Monitoring influenza virus oseltamivir resistance - our experience to date.

IF 0.5 4区 医学 Q4 MICROBIOLOGY Epidemiologie Mikrobiologie Imunologie Pub Date : 2021-01-01
L Nováková, M Havlíčková
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Abstract

Objective: The monitoring of influenza virus resistance is a routine part of influenza virus surveillance conducted by the National Reference Laboratory for Influenza and Non-Influenza Respiratory Viral Diseases (NRL/INI) at the National Institute of Public Health (NIPH). The aim is to detect neuraminidase inhibitor (oseltamivir) resistance in patients diagnosed with influenza.

Material and methods: A total of 326 influenza virus isolates from tissue culture were included in the study. They were obtained from inpatient and outpatient nasopharyngeal swabs which were referred to the NRL/INI during the seasons 2013/2014 to 2019/2020 and turned out to be RTPCR (reverse transcription polymerase chain reaction) positive for RNA (ribonucleic acid) of influenza virus A or B. The MDCK (Madin-Darby canine kidney) tissue culture cells were used for virus isolation from nasopharyngeal swabs. Oseltamivir resistance was tested using the NA-Star Influenza Neuraminidase Inhibitor Resistance Detection Kit (Applied Biosystems, Foster City, CA).

Results: Nine of 326 positive specimens were oseltamivir resistant. Resistant strains showed IC50 values 100 times as high on average as those in oseltamivir sensitive strains.

Conclusions: Monitoring influenza virus resistance is helpful in controlling reasonable prescription of antivirals and thus becomes an integral part of influenza virus surveillance. Antiviral resistance monitoring is necessary not only in hospitalized patients on antivirals but also in symptomatically treated outpatients as the detection of antiviral drug resistant strains in the latter group can suggest the emergence and/or spread of antiviral drug resistance in the population.

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监测流感病毒对奥司他韦的耐药性——我们迄今的经验。
目的:流感病毒耐药性监测是国家公共卫生研究所(NIPH)流感和非流感呼吸道病毒疾病国家参考实验室(NRL/INI)开展的流感病毒监测的常规组成部分。目的是检测诊断为流感的患者对神经氨酸酶抑制剂(奥司他韦)的耐药性。材料和方法:从组织培养中分离出326株流感病毒。从2013/2014年至2019/2020年期间提交NRL/INI的住院和门诊鼻咽拭子中获得流感病毒A或b的RNA(核糖核酸)逆转录聚合酶链反应(RTPCR)阳性。采用MDCK (Madin-Darby犬肾)组织培养细胞从鼻咽拭子中分离病毒。使用NA-Star流感神经氨酸酶抑制剂耐药性检测试剂盒(应用生物系统公司,福斯特城,CA)检测奥司他韦耐药性。结果:326例阳性标本中9例对奥司他韦耐药。耐药菌株的IC50值比奥司他韦敏感菌株平均高100倍。结论:流感病毒耐药性监测有助于控制合理的抗病毒药物处方,成为流感病毒监测的重要组成部分。抗病毒药物耐药性监测不仅对接受抗病毒药物治疗的住院患者有必要,而且对对症治疗的门诊患者也有必要,因为在后者中检测到抗病毒药物耐药菌株可以提示人群中出现和/或传播抗病毒药物耐药。
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来源期刊
Epidemiologie Mikrobiologie Imunologie
Epidemiologie Mikrobiologie Imunologie Medicine-Immunology and Allergy
CiteScore
0.90
自引率
0.00%
发文量
20
期刊介绍: The journal publishes original papers, information from practice, reviews on epidemiological and microbiological subjects. Sufficient space is devoted to diagnostic methods from medical microbiology, parasitology, immunology, and to general aspects and discussions pertaining to preventive medicine. It also brings translations and book reviews useful for medical doctors and research workers and professionals in public health.
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