首页 > 最新文献

Indian Journal of Medical Microbiology最新文献

英文 中文
Fulminant Pneumocystis jirovecii pneumonia presenting as multi-organ dysfunction syndrome in an immunocompetent host 在免疫功能正常的宿主中表现为多器官功能障碍综合征的暴发性肺囊虫肺炎
IF 1.3 4区 医学 Q4 IMMUNOLOGY Pub Date : 2025-12-10 DOI: 10.1016/j.ijmmb.2025.101037
Debasish Biswal , Arupparna Sengupta , Mohit Sharma , Bijay Ranjan Mirdha , Aayush Chawla , Rohit Kumar Garg , Sadia Khan , Anubhav Pandey , Sharmila Sengupta
Present case describes an apparently healthy adult who developed severe Pneumocystis jirovecii pneumonia (PJP) leading to multiple organ dysfunction syndrome. The patient presented with month-long fever, fatiguability and recent onset dyspnoea, subsequently developing acute respiratory distress syndrome (ARDS), acute kidney injury and haematological complications. Definitive diagnosis was made through microscopic examination of P.jirovecii cysts stained by Grocott Gomori Methenamine Silver (GMS) and positive PCR assay of broncho-alveolar lavage fluid. This case highlights the evolving spectrum of PJP manifestations and emphasizes the need for early diagnosis and appropriate management in apparently immunocompetent hosts.
本病例描述了一个表面上健康的成年人发展成严重的肺囊虫肺炎(PJP)导致多器官功能障碍综合征。患者表现为长达一个月的发热、疲劳和近期发作的呼吸困难,随后出现急性呼吸窘迫综合征(ARDS)、急性肾损伤和血液学并发症。通过Grocott Gomori Methenamine Silver (GMS)染色镜检和支气管肺泡灌洗液PCR阳性检测,明确诊断p.j roveci囊肿。本病例强调了PJP表现谱的演变,并强调了在明显免疫功能正常的宿主中早期诊断和适当治疗的必要性。
{"title":"Fulminant Pneumocystis jirovecii pneumonia presenting as multi-organ dysfunction syndrome in an immunocompetent host","authors":"Debasish Biswal ,&nbsp;Arupparna Sengupta ,&nbsp;Mohit Sharma ,&nbsp;Bijay Ranjan Mirdha ,&nbsp;Aayush Chawla ,&nbsp;Rohit Kumar Garg ,&nbsp;Sadia Khan ,&nbsp;Anubhav Pandey ,&nbsp;Sharmila Sengupta","doi":"10.1016/j.ijmmb.2025.101037","DOIUrl":"10.1016/j.ijmmb.2025.101037","url":null,"abstract":"<div><div>Present case describes an apparently healthy adult who developed severe <em>Pneumocystis jirovecii</em> pneumonia (PJP) leading to multiple organ dysfunction syndrome. The patient presented with month-long fever, fatiguability and recent onset dyspnoea, subsequently developing acute respiratory distress syndrome (ARDS), acute kidney injury and haematological complications. Definitive diagnosis was made through microscopic examination of <em>P.jirovecii</em> cysts stained by Grocott Gomori Methenamine Silver (GMS) and positive PCR assay of broncho-alveolar lavage fluid. This case highlights the evolving spectrum of PJP manifestations and emphasizes the need for early diagnosis and appropriate management in apparently immunocompetent hosts.</div></div>","PeriodicalId":13284,"journal":{"name":"Indian Journal of Medical Microbiology","volume":"59 ","pages":"Article 101037"},"PeriodicalIF":1.3,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145732941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rational test selection in immunology laboratory: Investigating the utility of repeated antinuclear antibody tests 免疫学实验室合理试验选择:探讨重复抗核抗体试验的效用
IF 1.3 4区 医学 Q4 IMMUNOLOGY Pub Date : 2025-12-09 DOI: 10.1016/j.ijmmb.2025.101035
Emrah Salman

Background

The primary reason for increased lab use is inappropriate or needless test requests. Our study examined the benefits of repeated antinuclear antibody (ANA) testing and the reasons for ANA test requests in accordance with reasonable test selection and inappropriate scenarios.

Methods

We examined 2.5 years of data from a Turkish tertiary hospital in this retrospective cohort analysis. ANA and other autoimmune test data and clinical information of all patients whose ANA result changed from negative to positive on repeat testing were gathered from the hospital record system.

Results

44,341 individuals had 51,959 ANA tests between February 2019 and June 2021. ANA tests were positive in 7551 (17 %) of 44,341 patients and 9303 (17.9 %) of 51,959 tests. On 14.6 % (7618 out of 51,959) of tests requested and 13.2 % (5891 out of 44,341) of patients, repeat tests were performed. Of the 5891 patients retested, 171 were initially negative but later positive. A minority (3.7 %) of initially negative ANA patients experienced a change to a titer of ≥1:100 in our 2.5-year investigation. A novel ANA associated rheumatic disease (AARD) was detected in 17 patients. The new positive ANA test had a positive predictive value of 15.1 % following an initially negative ANA test.

Conclusions

It is common to repeat ANA testing. ANA tests that yielded negative results in the beginning frequently repeat without change. Repetition had no effect on clinical prediction of AARD. Repeat ANA testing in hospital patients is ineffective rather than useful.
实验室使用增加的主要原因是不适当或不必要的测试要求。本研究探讨了重复抗核抗体(ANA)检测的益处,以及在合理的检测选择和不适当的情况下要求进行ANA检测的原因。方法回顾性队列分析了土耳其一家三级医院2.5年的数据。收集医院档案系统中所有重复检测ANA由阴性变为阳性的患者的ANA及其他自身免疫检测数据和临床信息。结果在2019年2月至2021年6月期间,44,341人进行了51,959次ANA测试。44,341例患者中有7551例(17%)ANA检测阳性,51,959例患者中有9303例(17.9%)ANA检测阳性。14.6%(51,959人中有7618人)和13.2%(44341人中有5891人)的患者进行了重复检查。在重新检测的5891名患者中,171名患者最初呈阴性,但后来呈阳性。在我们为期2.5年的调查中,少数(3.7%)最初阴性的ANA患者的滴度变化为≥1:100。在17例患者中发现了一种新型的ANA相关风湿病(AARD)。新的阳性ANA试验在最初的阴性ANA试验后具有15.1%的阳性预测值。结论重复ANA检测较为常见。一开始产生阴性结果的ANA测试经常重复而没有变化。重复对AARD的临床预测无影响。在医院患者中重复ANA检测是无效的,而不是有用的。
{"title":"Rational test selection in immunology laboratory: Investigating the utility of repeated antinuclear antibody tests","authors":"Emrah Salman","doi":"10.1016/j.ijmmb.2025.101035","DOIUrl":"10.1016/j.ijmmb.2025.101035","url":null,"abstract":"<div><h3>Background</h3><div>The primary reason for increased lab use is inappropriate or needless test requests. Our study examined the benefits of repeated antinuclear antibody (ANA) testing and the reasons for ANA test requests in accordance with reasonable test selection and inappropriate scenarios.</div></div><div><h3>Methods</h3><div>We examined 2.5 years of data from a Turkish tertiary hospital in this retrospective cohort analysis. ANA and other autoimmune test data and clinical information of all patients whose ANA result changed from negative to positive on repeat testing were gathered from the hospital record system.</div></div><div><h3>Results</h3><div>44,341 individuals had 51,959 ANA tests between February 2019 and June 2021. ANA tests were positive in 7551 (17 %) of 44,341 patients and 9303 (17.9 %) of 51,959 tests. On 14.6 % (7618 out of 51,959) of tests requested and 13.2 % (5891 out of 44,341) of patients, repeat tests were performed. Of the 5891 patients retested, 171 were initially negative but later positive. A minority (3.7 %) of initially negative ANA patients experienced a change to a titer of ≥1:100 in our 2.5-year investigation. A novel ANA associated rheumatic disease (AARD) was detected in 17 patients. The new positive ANA test had a positive predictive value of 15.1 % following an initially negative ANA test.</div></div><div><h3>Conclusions</h3><div>It is common to repeat ANA testing. ANA tests that yielded negative results in the beginning frequently repeat without change. Repetition had no effect on clinical prediction of AARD. Repeat ANA testing in hospital patients is ineffective rather than useful.</div></div>","PeriodicalId":13284,"journal":{"name":"Indian Journal of Medical Microbiology","volume":"59 ","pages":"Article 101035"},"PeriodicalIF":1.3,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145732942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Emergence and clonal transmission of Elizabethkingia meningoseptica in adult and paediatric intensive care units: An integrated clinical, microbiological, and genomic analysis “成人和儿科重症监护病房中伊丽莎白脑膜炎败血症的出现和克隆传播:综合临床、微生物学和基因组分析”。
IF 1.3 4区 医学 Q4 IMMUNOLOGY Pub Date : 2025-12-01 DOI: 10.1016/j.ijmmb.2025.101032
Debasish Biswal , Sharmila Sengupta , Ripenmeet Salhotra , Pankhuri Kumari , Maninder Dhaliwal , Sadia Khan , Aayush Chawla , Veena Raghunathan , Sandeep Mangla
Elizabethkingia meningoseptica is an emerging nosocomial pathogen with complex antimicrobial resistance. We conducted a retrospective study in intensive care units (August 2022–December 2024) involving thirteen patients (ten adults, three paediatric). Universal resistance to piperacillin/tazobactam, aminoglycosides but susceptibility to minocycline was observed. Environmental sampling revealed contamination in water outlets and sink holes. Whole genome sequencing demonstrated clonal relationships between clinical and environmental isolates, confirming nosocomial transmission. Neurological complications were significantly associated with mortality. Following targeted interventions including enhanced disinfection and thermal water flushing, no new cases occurred during three-month follow-up. This study highlights environmental surveillance and integrated infection control importance.
伊莉莎白菌脑膜炎败血症是一种具有复杂抗菌素耐药性的新出现的医院病原体。我们在重症监护室进行了一项回顾性研究(2022年8月至2024年12月),涉及13名患者(10名成人,3名儿科)。普遍对哌拉西林/他唑巴坦、氨基糖苷类耐药,但对米诺环素敏感。环境抽样显示,出水口和污水坑受到污染。全基因组测序显示临床和环境分离株之间存在克隆关系,证实了医院传播。神经系统并发症与死亡率显著相关。经过有针对性的干预措施,包括加强消毒和热水冲洗,在三个月的随访期间没有发生新的病例。本研究强调了环境监测和综合感染控制的重要性。
{"title":"Emergence and clonal transmission of Elizabethkingia meningoseptica in adult and paediatric intensive care units: An integrated clinical, microbiological, and genomic analysis","authors":"Debasish Biswal ,&nbsp;Sharmila Sengupta ,&nbsp;Ripenmeet Salhotra ,&nbsp;Pankhuri Kumari ,&nbsp;Maninder Dhaliwal ,&nbsp;Sadia Khan ,&nbsp;Aayush Chawla ,&nbsp;Veena Raghunathan ,&nbsp;Sandeep Mangla","doi":"10.1016/j.ijmmb.2025.101032","DOIUrl":"10.1016/j.ijmmb.2025.101032","url":null,"abstract":"<div><div><em>Elizabethkingia meningoseptica</em> is an emerging nosocomial pathogen with complex antimicrobial resistance. We conducted a retrospective study in intensive care units (August 2022–December 2024) involving thirteen patients (ten adults, three paediatric). Universal resistance to piperacillin/tazobactam, aminoglycosides but susceptibility to minocycline was observed. Environmental sampling revealed contamination in water outlets and sink holes. Whole genome sequencing demonstrated clonal relationships between clinical and environmental isolates, confirming nosocomial transmission. Neurological complications were significantly associated with mortality. Following targeted interventions including enhanced disinfection and thermal water flushing, no new cases occurred during three-month follow-up. This study highlights environmental surveillance and integrated infection control importance.</div></div>","PeriodicalId":13284,"journal":{"name":"Indian Journal of Medical Microbiology","volume":"59 ","pages":"Article 101032"},"PeriodicalIF":1.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145668261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Outbreak of Burkholderia cepacia bacteremia consequent to contaminated ultrasound gel-a report from a tertiary care centre in South Tamilnadu, India 受污染的超声凝胶导致的洋葱伯克霍尔德菌血症暴发——来自印度南泰米尔纳德邦一个三级保健中心的报告。
IF 1.3 4区 医学 Q4 IMMUNOLOGY Pub Date : 2025-11-28 DOI: 10.1016/j.ijmmb.2025.101033
G. Vithiya , V. Mangayarkarasi
We report an outbreak of Burkholderia cepacia bacteremia in a cardiothoracic surgery intensive care unit. Four cases of bloodstream infections were reported between August 16, 2024 and August 31, 2024. Microbiological surveillance of clean and sterile material from the unit revealed growth of B. cepacia from opened and sealed ultrasound gel bottles. Further cultures acquired from ultrasound gel containers from other units also grew B. cepacia and hence displaced by single use sterile gel. The outbreak was regarded terminated by the first week of September 2024 as no additional cases were described.
我们报告在心胸外科重症监护病房爆发的洋葱伯克氏菌菌血症。在2024年8月16日至8月31日期间报告了4例血液感染病例。对来自该单位的清洁和无菌材料的微生物监测显示,从打开和密封的超声凝胶瓶中生长的洋葱芽孢杆菌。从其他单位的超声凝胶容器中获得的进一步培养物也生长了洋葱芽孢杆菌,因此用一次性无菌凝胶代替。由于没有报告新的病例,疫情被认为在2024年9月的第一周结束。
{"title":"Outbreak of Burkholderia cepacia bacteremia consequent to contaminated ultrasound gel-a report from a tertiary care centre in South Tamilnadu, India","authors":"G. Vithiya ,&nbsp;V. Mangayarkarasi","doi":"10.1016/j.ijmmb.2025.101033","DOIUrl":"10.1016/j.ijmmb.2025.101033","url":null,"abstract":"<div><div>We report an outbreak of <em>Burkholderia cepacia</em> bacteremia in a cardiothoracic surgery intensive care unit. Four cases of bloodstream infections were reported between August 16, 2024 and August 31, 2024. Microbiological surveillance of clean and sterile material from the unit revealed growth of <em>B. cepacia</em> from opened and sealed ultrasound gel bottles. Further cultures acquired from ultrasound gel containers from other units also grew <em>B. cepacia</em> and hence displaced by single use sterile gel. The outbreak was regarded terminated by the first week of September 2024 as no additional cases were described.</div></div>","PeriodicalId":13284,"journal":{"name":"Indian Journal of Medical Microbiology","volume":"59 ","pages":"Article 101033"},"PeriodicalIF":1.3,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145648423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prevalence of Chlamydia trachomatis, Ureaplasma spp., Mycoplasma hominis and Mycoplasma genitalium in patients with sterile pyuria 无菌性脓尿患者沙眼衣原体、脲原体、人支原体和生殖支原体的患病率
IF 1.3 4区 医学 Q4 IMMUNOLOGY Pub Date : 2025-11-25 DOI: 10.1016/j.ijmmb.2025.101030
Anivita Aggarwal , Debasish Biswal , Jyoti Rawre , Naval Vikram , Naveet Wig , Manish Soneja , Sreenivas Vishnubhatla , Benu Dhawan

Introduction

Sterile pyuria poses a diagnostic challenge due to varied aetiologies. Atypical pathogens including Chlamydia trachomatis and genital mycoplasmas are considered etiological agents but are under-reported, especially in resource-limited settings. This study determined the prevalence of these atypical pathogens in sterile pyuria patients.

Materials and methods

This 4-year prospective observational study screened 640 adults admitted to Medicine wards of a tertiary care hospital for sterile pyuria, defined as urine microscopy showing >10 WBCs/HPF with no bacterial growth on culture. All sterile pyuria patients were evaluated for Chlamydia trachomatis (CT), Ureaplasma spp., Mycoplasma hominis (MH) and Mycoplasma genitalium (MG) from first void urine samples. Mycoplasma hominis and Ureaplasma spp. were detected by culture and PCR assay. Chlamydia trachomatis was detected by PCR assay. Mycoplasma genitalium was detected by Real-time PCR assay. Additional assessments for other potential causes were carried out. Patients were treated with doxycycline or azithromycin and followed for outcomes. Risk factors for infection with these atypical agents were explored.

Results

Of 640 patients screened, 100 (15.6 %) had sterile pyuria. Atypical pathogens were detected in 40 %. CT, Ureaplasma spp., and MH were detected in 19 %, 15 % and 5 % respectively. One patient tested positive for MG. Multivariate logistic regression identified multiple sexual partners (adjusted OR 12.01, 95 % CI 2.07–69.40, p = 0.005) and past pelvic surgery (adjusted OR 5.64, 95 % CI 1.43–22.24, p = 0.013) as risk factors. Twenty-five (62.5 %) of 40 patients achieved complete clinical and microbiological cure with treatment. Laboratory records revealed genitourinary tuberculosis in 2 patients.

Conclusion

This study identified 40 % prevalence of atypical pathogens in sterile pyuria patients. Unlike previous assumptions, genitourinary tuberculosis was not a common cause in our population. Our findings emphasize the necessity for comprehensive screening for CT, Ureaplasma spp., MH, and MG in sterile pyuria patients.
无菌脓尿由于病因多样,给诊断带来了挑战。包括沙眼衣原体和生殖器支原体在内的非典型病原体被认为是病原体,但报告不足,特别是在资源有限的情况下。本研究确定了无菌脓尿患者中这些非典型病原体的患病率。材料和方法这项为期4年的前瞻性观察研究筛选了一家三级医院内科病房收治的640名无菌脓尿症成年人,定义为尿液显微镜显示10个白细胞/HPF,培养物上没有细菌生长。对所有无菌脓尿患者进行首次空尿沙眼衣原体(CT)、脲原体、人支原体(MH)和生殖支原体(MG)检测。用培养法和PCR法检测人支原体和脲原体。PCR检测沙眼衣原体。采用Real-time PCR法检测生殖支原体。对其他潜在原因进行了进一步评估。患者接受强力霉素或阿奇霉素治疗并随访结果。探讨了感染这些非典型病原体的危险因素。结果640例患者中,无菌脓尿100例(15.6%)。非典型病原体检出率为40%。CT、脲原体和MH检出率分别为19%、15%和5%。一名患者MG检测呈阳性。多因素logistic回归发现多个性伴侣(校正OR 12.01, 95% CI 2.07-69.40, p = 0.005)和既往盆腔手术(校正OR 5.64, 95% CI 1.43-22.24, p = 0.013)是危险因素。经治疗,40例患者中25例(62.5%)达到临床和微生物学完全治愈。实验室记录显示2例泌尿生殖系统结核。结论无菌性脓尿患者中非典型病原体的患病率为40%。与以前的假设不同,泌尿生殖系统结核病在我们的人群中并不常见。我们的研究结果强调了对无菌脓尿患者进行CT、脲原体、MH和MG综合筛查的必要性。
{"title":"Prevalence of Chlamydia trachomatis, Ureaplasma spp., Mycoplasma hominis and Mycoplasma genitalium in patients with sterile pyuria","authors":"Anivita Aggarwal ,&nbsp;Debasish Biswal ,&nbsp;Jyoti Rawre ,&nbsp;Naval Vikram ,&nbsp;Naveet Wig ,&nbsp;Manish Soneja ,&nbsp;Sreenivas Vishnubhatla ,&nbsp;Benu Dhawan","doi":"10.1016/j.ijmmb.2025.101030","DOIUrl":"10.1016/j.ijmmb.2025.101030","url":null,"abstract":"<div><h3>Introduction</h3><div>Sterile pyuria poses a diagnostic challenge due to varied aetiologies. Atypical pathogens including <em>Chlamydia trachomatis</em> and genital mycoplasmas are considered etiological agents but are under-reported, especially in resource-limited settings. This study determined the prevalence of these atypical pathogens in sterile pyuria patients.</div></div><div><h3>Materials and methods</h3><div>This 4-year prospective observational study screened 640 adults admitted to Medicine wards of a tertiary care hospital for sterile pyuria, defined as urine microscopy showing &gt;10 WBCs/HPF with no bacterial growth on culture. All sterile pyuria patients were evaluated for <em>Chlamydia trachomatis</em> (CT), <em>Ureaplasma</em> spp., <em>Mycoplasma hominis</em> (MH) and <em>Mycoplasma genitalium</em> (MG) from first void urine samples. <em>Mycoplasma hominis</em> and <em>Ureaplasma</em> spp. were detected by culture and PCR assay. <em>Chlamydia trachomatis</em> was detected by PCR assay. <em>Mycoplasma genitalium</em> was detected by Real-time PCR assay. Additional assessments for other potential causes were carried out. Patients were treated with doxycycline or azithromycin and followed for outcomes. Risk factors for infection with these atypical agents were explored.</div></div><div><h3>Results</h3><div>Of 640 patients screened, 100 (15.6 %) had sterile pyuria. Atypical pathogens were detected in 40 %. CT, <em>Ureaplasma</em> spp., and MH were detected in 19 %, 15 % and 5 % respectively. One patient tested positive for MG. Multivariate logistic regression identified multiple sexual partners (adjusted OR 12.01, 95 % CI 2.07–69.40, p = 0.005) and past pelvic surgery (adjusted OR 5.64, 95 % CI 1.43–22.24, p = 0.013) as risk factors. Twenty-five (62.5 %) of 40 patients achieved complete clinical and microbiological cure with treatment. Laboratory records revealed genitourinary tuberculosis in 2 patients.</div></div><div><h3>Conclusion</h3><div>This study identified 40 % prevalence of atypical pathogens in sterile pyuria patients. Unlike previous assumptions, genitourinary tuberculosis was not a common cause in our population. Our findings emphasize the necessity for comprehensive screening for CT, <em>Ureaplasma</em> spp., MH, and MG in sterile pyuria patients.</div></div>","PeriodicalId":13284,"journal":{"name":"Indian Journal of Medical Microbiology","volume":"59 ","pages":"Article 101030"},"PeriodicalIF":1.3,"publicationDate":"2025-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Catheter-related bloodstream infection by Kocuria rhizophila in a dialysis patient 1例透析患者导管相关性血液感染的嗜根瘤菌
IF 1.3 4区 医学 Q4 IMMUNOLOGY Pub Date : 2025-11-25 DOI: 10.1016/j.ijmmb.2025.101029
Aditi Gupta , Nithya S. Roy , Vibhor Tak , Manish Chaturvedy
Catheter related bloodstream infections are a common concern in hospitalized and immunocompromised patients. We report a case of CKD with an indwelling left IJV Permacath who developed fever and chills during dialysis. Investigations showed leukocytosis, elevated CRP (75 mg/L), and procalcitonin (9.1 ng/mL). Paired blood cultures grew Kocuria rhizophila, identified by MALDI-TOF, with a two-hour difference in positivity indicating CRBSI. Vancomycin led to improvement and antibiotic lock therapy was initiated. This case highlights that rare organisms such as K. rhizophila can be true pathogens in dialysis patients, and correct identification with MALDI-TOF alongside clinical correlation is crucial for appropriate management.
导管相关性血流感染是住院和免疫功能低下患者的常见问题。我们报告一例CKD与留置左IJV Permacath谁在透析期间出现发烧和发冷。调查显示白细胞增多,CRP升高(75 mg/L),降钙素原(9.1 ng/mL)。配对的血培养物培养出由MALDI-TOF鉴定的嗜根瘤菌(Kocuria rhizophila),两小时的阳性差异表明CRBSI。万古霉素导致改善,并开始抗生素锁定治疗。这个病例强调了一些罕见的微生物,如嗜根K.菌,可能是透析患者的真正病原体,正确识别MALDI-TOF以及临床相关性对于适当的管理至关重要。
{"title":"Catheter-related bloodstream infection by Kocuria rhizophila in a dialysis patient","authors":"Aditi Gupta ,&nbsp;Nithya S. Roy ,&nbsp;Vibhor Tak ,&nbsp;Manish Chaturvedy","doi":"10.1016/j.ijmmb.2025.101029","DOIUrl":"10.1016/j.ijmmb.2025.101029","url":null,"abstract":"<div><div>Catheter related bloodstream infections are a common concern in hospitalized and immunocompromised patients. We report a case of CKD with an indwelling left IJV Permacath who developed fever and chills during dialysis. Investigations showed leukocytosis, elevated CRP (75 mg/L), and procalcitonin (9.1 ng/mL). Paired blood cultures grew <em>Kocuria rhizophila</em>, identified by MALDI-TOF, with a two-hour difference in positivity indicating CRBSI. Vancomycin led to improvement and antibiotic lock therapy was initiated. This case highlights that rare organisms such as <em>K. rhizophila</em> can be true pathogens in dialysis patients, and correct identification with MALDI-TOF alongside clinical correlation is crucial for appropriate management.</div></div>","PeriodicalId":13284,"journal":{"name":"Indian Journal of Medical Microbiology","volume":"59 ","pages":"Article 101029"},"PeriodicalIF":1.3,"publicationDate":"2025-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Meta-analysis of the diagnostic value of polymerase chain reaction-based nucleic acid detection methods for pertussis 聚合酶链反应核酸检测方法对百日咳诊断价值的meta分析
IF 1.3 4区 医学 Q4 IMMUNOLOGY Pub Date : 2025-11-24 DOI: 10.1016/j.ijmmb.2025.101031
Fengyuan He , Limin Mei , Linzi Zeng

Introduction

Pertussis is an acute respiratory disease primarily caused by Bordetella pertussis, and its incidence has shown a resurgence. Polymerase chain reaction (PCR) is a recognized molecular detection method, and various related detection methods have emerged.

Methods

This study is performed according to the PRISMA checklist. Relevant literature is adopted from the online databases. The quality of the included studies is assessed based on the REVMAN software (version 5.4). Statistical analysis is performed by STATA 14.0 and Meta-DiSc 1.4 software.

Results

The results of this meta-analysis show that four different PCR techniques—conventional PCR, real-time quantitative PCR (Q-PCR), multiplex PCR, and nested PCR—have a pooled sensitivity of 0.95 (95 % CI: 0.93–0.97), pooled specificity of 0.93 (95 % CI: 0.89–0.95), pooled positive likelihood ratio (PLR) of 12.22 (95 % CI: 8.62–17.33), pooled negative likelihood ratio (NLR) of 0.05 (95 % CI: 0.03–0.08), and pooled diagnostic odds ratio (DOR) of 244.88 (95 % CI: 133.34–449.72). Multiplex PCR has the highest pooled specificity, PLR, and DOR. Nested PCR has the highest sensitivity and the lowest NLR. PCR testing holds significant value in the early diagnosis of pertussis. Multiplex PCR, nested PCR, and Q-PCR outperform conventional PCR in diagnostic performance.

Conclusions

Each type of PCR test has its advantages and disadvantages, and clinical selection should consider factors such as testing purpose, personnel, and conditions.
简介百日咳是一种主要由百日咳博德泰拉引起的急性呼吸道疾病,其发病率呈死灰复燃趋势。聚合酶链反应(Polymerase chain reaction, PCR)是一种公认的分子检测方法,相关的检测方法层出不穷。方法本研究按照PRISMA检查表进行。相关文献采用在线数据库。采用REVMAN软件(版本5.4)评估纳入研究的质量。采用STATA 14.0和Meta-DiSc 1.4软件进行统计分析。结果常规PCR、实时定量PCR (Q-PCR)、多重PCR和巢式PCR 4种不同PCR技术的合并敏感性为0.95 (95% CI: 0.93 ~ 0.97),合并特异性为0.93 (95% CI: 0.89 ~ 0.95),合并阳性似然比(PLR)为12.22 (95% CI: 8.62 ~ 17.33),合并阴性似然比(NLR)为0.05 (95% CI: 0.03 ~ 0.08),合并诊断优势比(DOR)为244.88 (95% CI: 133.34 ~ 449.72)。多重PCR具有最高的聚合特异性、PLR和DOR。巢式PCR的灵敏度最高,NLR最低。PCR检测对百日咳的早期诊断有重要价值。多重PCR、巢式PCR和Q-PCR在诊断性能上优于传统PCR。结论每种PCR检测方法各有优缺点,临床应综合考虑检测目的、人员、条件等因素进行选择。
{"title":"Meta-analysis of the diagnostic value of polymerase chain reaction-based nucleic acid detection methods for pertussis","authors":"Fengyuan He ,&nbsp;Limin Mei ,&nbsp;Linzi Zeng","doi":"10.1016/j.ijmmb.2025.101031","DOIUrl":"10.1016/j.ijmmb.2025.101031","url":null,"abstract":"<div><h3>Introduction</h3><div>Pertussis is an acute respiratory disease primarily caused by <em>Bordetella pertussis</em>, and its incidence has shown a resurgence. Polymerase chain reaction (PCR) is a recognized molecular detection method, and various related detection methods have emerged.</div></div><div><h3>Methods</h3><div>This study is performed according to the PRISMA checklist. Relevant literature is adopted from the online databases. The quality of the included studies is assessed based on the REVMAN software (version 5.4). Statistical analysis is performed by STATA 14.0 and Meta-DiSc 1.4 software.</div></div><div><h3>Results</h3><div>The results of this meta-analysis show that four different PCR techniques—conventional PCR, real-time quantitative PCR (Q-PCR), multiplex PCR, and nested PCR—have a pooled sensitivity of 0.95 (95 % CI: 0.93–0.97), pooled specificity of 0.93 (95 % CI: 0.89–0.95), pooled positive likelihood ratio (PLR) of 12.22 (95 % CI: 8.62–17.33), pooled negative likelihood ratio (NLR) of 0.05 (95 % CI: 0.03–0.08), and pooled diagnostic odds ratio (DOR) of 244.88 (95 % CI: 133.34–449.72). Multiplex PCR has the highest pooled specificity, PLR, and DOR. Nested PCR has the highest sensitivity and the lowest NLR. PCR testing holds significant value in the early diagnosis of pertussis. Multiplex PCR, nested PCR, and Q-PCR outperform conventional PCR in diagnostic performance.</div></div><div><h3>Conclusions</h3><div>Each type of PCR test has its advantages and disadvantages, and clinical selection should consider factors such as testing purpose, personnel, and conditions.</div></div>","PeriodicalId":13284,"journal":{"name":"Indian Journal of Medical Microbiology","volume":"59 ","pages":"Article 101031"},"PeriodicalIF":1.3,"publicationDate":"2025-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Genetic plasticity of Escherichia coli causing bloodstream infections in India: A focus on phylogroups A to F 引起印度血液感染的大肠杆菌的遗传可塑性:A到F系统群的焦点。
IF 1.3 4区 医学 Q4 IMMUNOLOGY Pub Date : 2025-11-22 DOI: 10.1016/j.ijmmb.2025.101026
Karthik Gunasekaran , Irulappan Madhumathi , Santhosh Raj , Greesma Grace Thomas , Venkatesh Narashiman , Vishnukumar Ramesh , Subbulakshmi Rajendran , Ramprakash Rayala , Ayyanraj Neeravi , Binesh Lal , Kamini Walia , Balaji Veeraraghavan

Background

Escherichia coli is a major pathogen in bloodstream infections (BSIs), with increasing concern over antimicrobial resistance (AMR) and the evolving pathogenic potential of phylogroups traditionally considered commensal. This study investigates the genetic characteristics of E. coli isolates causing BSIs in India, with a focus on phylogroups A to F.

Methods

204 E. coli bloodstream isolates received at a tertiary hospital in India were whole genome sequenced. Phylogroups, sequence types (STs), antimicrobial resistance genes (ARGs), virulence factors (VFs), and plasmid replicon types were determined. Bioinformatics analyses include MLST, ResFinder, VirulenceFinder, PlasmidFinder, and ClermonTyping for phylogroup assignment.

Results

Phylogroup B2 (35 %) was the most prevalent, followed by phylogroup A (32 %) and D (19 %). ST131 (B2) emerged as the dominant clone (22 %). Phylogroup A isolates, previously considered commensal and primarily associated with high AMR, now demonstrated notable acquisition of virulence factors such as fimH and iutA, indicating an emerging role as significant BSI pathogens. These isolates also showed high clonal diversity (e.g., ST167, ST410, ST617). Key resistance genes included blaCTX-M (53 %) and blaTEM (25 %), frequently associated with IncF plasmids. Multi-replicon plasmid profiles, particularly IncF variants, were significantly associated with co-carriage of both AMR and VF genes, contributing to enhanced pathogenicity.

Conclusion

This study highlights the emerging role of phylogroup A E. coli, traditionally commensal and AMR-rich as a leading cause of BSIs in India following the acquisition of virulence factors. In parallel, B2 clones like ST131 continue to drive infections through their established virulence and resistance repertoire. Such multi-replicon IncF plasmids driving AMR–VF co-selection, calls for focused surveillance and intervention in E. coli BSIs.
背景:大肠杆菌是血流感染(bsi)的主要病原体,人们越来越关注抗菌素耐药性(AMR)和传统上被认为是共生的系统群不断发展的致病潜力。本研究调查了印度引起bsi的大肠杆菌分离株的遗传特征,重点研究了系统群a至f。方法:对印度一家三级医院接收的204株大肠杆菌血液分离株进行了全基因组测序。测定系统群、序列型(STs)、耐药基因(ARGs)、毒力因子(VFs)和质粒复制子类型。生物信息学分析包括MLST, ResFinder, VirulenceFinder, PlasmidFinder和ClermonTyping用于系统群分配。结果:系统群B2(35%)最多,其次是系统群A(32%)和D(19%)。ST131 (B2)为优势克隆(22%)。系统群A分离物,以前被认为是共生的,主要与高AMR相关,现在显示出显著的毒力因子,如fimH和iutA,表明其作为重要BSI病原体的作用正在显现。这些分离株也表现出较高的克隆多样性(如ST167、ST410、ST617)。关键抗性基因包括blaCTX-M(53%)和blaTEM(25%),通常与IncF质粒相关。多复制子质粒谱,特别是IncF变异,与AMR和VF基因的共同携带显著相关,有助于增强致病性。结论:本研究强调了系统群A大肠杆菌的新作用,传统上是共生的,富含AMR,是获得毒力因子后印度bsi的主要原因。与此同时,像ST131这样的B2克隆继续通过其既定的毒力和抗性库驱动感染。这种多复制子IncF质粒驱动AMR-VF共选择,要求对大肠杆菌bsi进行重点监测和干预。
{"title":"Genetic plasticity of Escherichia coli causing bloodstream infections in India: A focus on phylogroups A to F","authors":"Karthik Gunasekaran ,&nbsp;Irulappan Madhumathi ,&nbsp;Santhosh Raj ,&nbsp;Greesma Grace Thomas ,&nbsp;Venkatesh Narashiman ,&nbsp;Vishnukumar Ramesh ,&nbsp;Subbulakshmi Rajendran ,&nbsp;Ramprakash Rayala ,&nbsp;Ayyanraj Neeravi ,&nbsp;Binesh Lal ,&nbsp;Kamini Walia ,&nbsp;Balaji Veeraraghavan","doi":"10.1016/j.ijmmb.2025.101026","DOIUrl":"10.1016/j.ijmmb.2025.101026","url":null,"abstract":"<div><h3>Background</h3><div><em>Escherichia coli</em> is a major pathogen in bloodstream infections (BSIs), with increasing concern over antimicrobial resistance (AMR) and the evolving pathogenic potential of phylogroups traditionally considered commensal. This study investigates the genetic characteristics of <em>E. coli</em> isolates causing BSIs in India, with a focus on phylogroups A to F.</div></div><div><h3>Methods</h3><div>204 <em>E. coli</em> bloodstream isolates received at a tertiary hospital in India were whole genome sequenced. Phylogroups, sequence types (STs), antimicrobial resistance genes (ARGs), virulence factors (VFs), and plasmid replicon types were determined. Bioinformatics analyses include MLST, ResFinder, VirulenceFinder, PlasmidFinder, and ClermonTyping for phylogroup assignment.</div></div><div><h3>Results</h3><div>Phylogroup B2 (35 %) was the most prevalent, followed by phylogroup A (32 %) and D (19 %). ST131 (B2) emerged as the dominant clone (22 %). Phylogroup A isolates, previously considered commensal and primarily associated with high AMR, now demonstrated notable acquisition of virulence factors such as <em>fimH</em> and <em>iutA</em>, indicating an emerging role as significant BSI pathogens. These isolates also showed high clonal diversity (e.g., ST167, ST410, ST617). Key resistance genes included blaCTX-M (53 %) and blaTEM (25 %), frequently associated with IncF plasmids. Multi-replicon plasmid profiles, particularly IncF variants, were significantly associated with co-carriage of both AMR and VF genes, contributing to enhanced pathogenicity.</div></div><div><h3>Conclusion</h3><div>This study highlights the emerging role of phylogroup A <em>E. coli</em>, traditionally commensal and AMR-rich as a leading cause of BSIs in India following the acquisition of virulence factors. In parallel, B2 clones like ST131 continue to drive infections through their established virulence and resistance repertoire. Such multi-replicon IncF plasmids driving AMR–VF co-selection, calls for focused surveillance and intervention in <em>E. coli</em> BSIs.</div></div>","PeriodicalId":13284,"journal":{"name":"Indian Journal of Medical Microbiology","volume":"59 ","pages":"Article 101026"},"PeriodicalIF":1.3,"publicationDate":"2025-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145587295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Out of Sight, Should not be out of mind: A perplexing case of Malaria 眼不见,心不应忘:一个令人困惑的疟疾病例。
IF 1.3 4区 医学 Q4 IMMUNOLOGY Pub Date : 2025-11-21 DOI: 10.1016/j.ijmmb.2025.101028
Shilpi Saxena , Reena Das , Sumeeta Khurana , Saleem Amjad Mirza , Kamal Deep Joshi , Harleen Kaur
Malaria diagnosis is often difficult in cases with low parasitaemia and atypical presentations. We report a 30-year-old male with high-grade fever, chills, and vomiting. At admission, he was afebrile, pale, and had progressive splenomegaly. Despite extensive investigations, including multiple peripheral blood smears and malaria rapid diagnostic tests, results were negative. Bone marrow examination revealed rare red blood cells with Plasmodium spp., confirmed by PCR from the marrow aspirate slide. He completely recovered after treatment with Artemether-Lumefantrine and Primaquine. This case underscores the value of bone marrow microscopy and PCR in diagnosing malaria in patients with unexplained cytopenias and splenomegaly.
在低寄生虫血症和非典型表现的病例中,疟疾诊断往往很困难。我们报告一名30岁男性患者出现高热、寒战和呕吐。入院时,他发热,脸色苍白,并有进行性脾大。尽管进行了广泛的调查,包括多次外周血涂片和疟疾快速诊断测试,但结果均为阴性。骨髓检查发现罕见的带有疟原虫的红细胞,经骨髓吸片PCR证实。经甲醚-氨苯曲明和伯氨喹治疗后完全康复。本病例强调了骨髓显微镜和PCR在诊断不明原因的细胞减少和脾肿大患者的疟疾中的价值。
{"title":"Out of Sight, Should not be out of mind: A perplexing case of Malaria","authors":"Shilpi Saxena ,&nbsp;Reena Das ,&nbsp;Sumeeta Khurana ,&nbsp;Saleem Amjad Mirza ,&nbsp;Kamal Deep Joshi ,&nbsp;Harleen Kaur","doi":"10.1016/j.ijmmb.2025.101028","DOIUrl":"10.1016/j.ijmmb.2025.101028","url":null,"abstract":"<div><div>Malaria diagnosis is often difficult in cases with low parasitaemia and atypical presentations. We report a 30-year-old male with high-grade fever, chills, and vomiting. At admission, he was afebrile, pale, and had progressive splenomegaly. Despite extensive investigations, including multiple peripheral blood smears and malaria rapid diagnostic tests, results were negative. Bone marrow examination revealed rare red blood cells with <em>Plasmodium</em> spp., confirmed by PCR from the marrow aspirate slide. He completely recovered after treatment with Artemether-Lumefantrine and Primaquine. This case underscores the value of bone marrow microscopy and PCR in diagnosing malaria in patients with unexplained cytopenias and splenomegaly.</div></div>","PeriodicalId":13284,"journal":{"name":"Indian Journal of Medical Microbiology","volume":"59 ","pages":"Article 101028"},"PeriodicalIF":1.3,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145587349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Molecular epidemiology of human rhinovirus from clinical cases of Dibrugarh, Assam, India 印度阿萨姆邦迪布鲁加尔邦临床病例中人鼻病毒的分子流行病学研究
IF 1.3 4区 医学 Q4 IMMUNOLOGY Pub Date : 2025-11-21 DOI: 10.1016/j.ijmmb.2025.101027
Mandakini Das , Biswajyoti Borkakoty , Nargis K. Bali , Neelanjana Sarmah , Aniruddha Jakharia , Rahul Hazarika , Chandrakanta Bhattacharya , Aktarul Islam Siddique , Kishore Sarma , Kimmi Sarmah , Harpreet Kaur

Purpose

Human rhinovirus (HRV), a member of the Enterovirus genus of the Picornaviridae family is a major respiratory pathogen and the leading cause of upper respiratory tract infections. Given the limited information on HRV prevalence and molecular epidemiology in Northeast India, this study investigated circulating HRV strains in the region from 2015 to 2018.

Methods

Nasopharyngeal and throat swab samples were collected and RNA was extracted for HRV detection using qRT-PCR. HRV-positive samples were subjected to bidirectional Sanger sequencing targeting the 549 bp VP4/VP2 region. Obtained sequences were aligned and analyzed phylogenetically using bioinformatics tools to determine genotype distribution and genetic diversity.

Results

Among 2642 cases, 354 (13.3 %) tested positive for HRV. HRV-C was the predominant species (48.7 %), followed by HRV-A (38.4 %) and HRV-B (7.6 %). HRV infection was significantly associated with lower respiratory symptoms such as cough (p < 0.001) and breathlessness (p < 0.026). The study identified 27 different HRV genotypes in the 39 sequenced samples, with HRV-C15 being the most common (9/39) overall and associated with disease severity (p = 0.003). Seasonality analysis indicated peak HRV circulation between August and November (48.8 %, 173/354), with the lowest detected in June–July (14.1 %). HRV-C was more frequently observed in severe acute respiratory infection (SARI) cases and demonstrated the highest heterogeneity, with an intra-species nucleotide mean p-distance of 24.0 %.

Conclusion

In conclusion, this study presents the first report on the prevalence of human rhinovirus (HRV) among influenza-like illness (ILI) cases in Dibrugarh, Assam, India. HRV-C exhibited distinct epidemiological characteristics compared to HRV-A and HRV-B strains. Molecular epidemiological analysis revealed notable nucleotide variation in the VP4/VP2 region, with HRV-C15 emerging as the predominant genotype associated with increased disease severity. Further research involving larger sample sizes and detailed clinical follow-up is essential to better understand the genotype distribution and genetic diversity of HRV strains circulating in the region.
目的:人鼻病毒(HRV)是小核糖核酸病毒科肠病毒属的一员,是一种主要的呼吸道病原体,是上呼吸道感染的主要原因。鉴于印度东北部HRV患病率和分子流行病学信息有限,本研究调查了2015年至2018年该地区流行的HRV菌株。方法:采集鼻咽和咽拭子标本,提取RNA,采用qRT-PCR检测HRV。hrv阳性样本针对549 bp VP4/VP2区域进行双向Sanger测序。利用生物信息学工具对获得的序列进行比对和系统发育分析,以确定基因型分布和遗传多样性。结果:2642例中,HRV阳性354例(13.3%)。HRV-C是优势种(48.7%),其次是HRV-A(38.4%)和HRV-B(7.6%)。HRV感染与咳嗽等下呼吸道症状显著相关(结论:本研究首次报道了印度阿萨姆邦迪布鲁加尔省流感样疾病(ILI)病例中人鼻病毒(HRV)的流行情况。与HRV-A和HRV-B株相比,HRV-C株具有明显的流行病学特征。分子流行病学分析显示VP2/VP4区域的核苷酸显著变异,HRV-C15成为与疾病严重程度增加相关的主要基因型。为了更好地了解该地区流行的HRV毒株的基因型分布和遗传多样性,需要开展更大样本量和详细临床随访的进一步研究。
{"title":"Molecular epidemiology of human rhinovirus from clinical cases of Dibrugarh, Assam, India","authors":"Mandakini Das ,&nbsp;Biswajyoti Borkakoty ,&nbsp;Nargis K. Bali ,&nbsp;Neelanjana Sarmah ,&nbsp;Aniruddha Jakharia ,&nbsp;Rahul Hazarika ,&nbsp;Chandrakanta Bhattacharya ,&nbsp;Aktarul Islam Siddique ,&nbsp;Kishore Sarma ,&nbsp;Kimmi Sarmah ,&nbsp;Harpreet Kaur","doi":"10.1016/j.ijmmb.2025.101027","DOIUrl":"10.1016/j.ijmmb.2025.101027","url":null,"abstract":"<div><h3>Purpose</h3><div>Human rhinovirus (HRV), a member of the <em>Enterovirus</em> genus of the <em>Picornaviridae</em> family is a major respiratory pathogen and the leading cause of upper respiratory tract infections. Given the limited information on HRV prevalence and molecular epidemiology in Northeast India, this study investigated circulating HRV strains in the region from 2015 to 2018.</div></div><div><h3>Methods</h3><div>Nasopharyngeal and throat swab samples were collected and RNA was extracted for HRV detection using qRT-PCR. HRV-positive samples were subjected to bidirectional Sanger sequencing targeting the 549 bp VP4/VP2 region. Obtained sequences were aligned and analyzed phylogenetically using bioinformatics tools to determine genotype distribution and genetic diversity.</div></div><div><h3>Results</h3><div>Among 2642 cases, 354 (13.3 %) tested positive for HRV. HRV-C was the predominant species (48.7 %), followed by HRV-A (38.4 %) and HRV-B (7.6 %). HRV infection was significantly associated with lower respiratory symptoms such as cough (p &lt; 0.001) and breathlessness (p &lt; 0.026). The study identified 27 different HRV genotypes in the 39 sequenced samples, with HRV-C15 being the most common (9/39) overall and associated with disease severity (p = 0.003). Seasonality analysis indicated peak HRV circulation between August and November (48.8 %, 173/354), with the lowest detected in June–July (14.1 %). HRV-C was more frequently observed in severe acute respiratory infection (SARI) cases and demonstrated the highest heterogeneity, with an intra-species nucleotide mean p-distance of 24.0 %.</div></div><div><h3>Conclusion</h3><div>In conclusion, this study presents the first report on the prevalence of human rhinovirus (HRV) among influenza-like illness (ILI) cases in Dibrugarh, Assam, India. HRV-C exhibited distinct epidemiological characteristics compared to HRV-A and HRV-B strains. Molecular epidemiological analysis revealed notable nucleotide variation in the VP4/VP2 region, with HRV-C15 emerging as the predominant genotype associated with increased disease severity. Further research involving larger sample sizes and detailed clinical follow-up is essential to better understand the genotype distribution and genetic diversity of HRV strains circulating in the region.</div></div>","PeriodicalId":13284,"journal":{"name":"Indian Journal of Medical Microbiology","volume":"59 ","pages":"Article 101027"},"PeriodicalIF":1.3,"publicationDate":"2025-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145587306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Indian Journal of Medical Microbiology
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1