Pediatric Infectious Disease Journal最新文献

Background: Human bocavirus 1 (HBoV1) is a respiratory pathogen predominantly affecting children. However, its epidemiology and clinical impact remain poorly understood. This study aimed to investigate the seasonality, disease burden and clinical features of HBoV1 infection in hospitalized pediatric patients in Japan.

Methods: We conducted a retrospective study at Tokyo Metropolitan Children's Medical Center from September 2023 to August 2024. Children ≤15 years old hospitalized with respiratory tract infections requiring oxygen therapy and/or noninvasive/invasive mechanical ventilation were included. HBoV1 DNA levels were quantified using real-time polymerase chain reaction (PCR), and acute HBoV1 infection was defined as ≥10 5 copies/mL. A quantitative PCR test was also performed for respiratory viruses simultaneously detected by a multiplex PCR, to distinguish between HBoV1 monoinfection and coinfection with other viruses.

Results: Among 327 eligible patients, acute HBoV1 infection was found in 13% (44/327), with peak incidence in June and July 2024. HBoV1 monoinfection was 41% (18/44). The patients with HBoV1 monoinfection had a median age of 25 months (interquartile range, 14-50), and 39% had underlying diseases. Fever and cough were common symptoms, and wheezing was observed in half of the patients. Intensive care unit admission was required in 33% of the patients with HBoV1 monoinfection, with 67% of them requiring mechanical ventilation. HBoV1 was the 3rd most common cause in patients admitted to the intensive care unit (19%).

Conclusions: HBoV1 was prevalent in the late spring and early summer during the 2023 to 2024 season in Tokyo, Japan. HBoV1 may contribute substantially to the burden of severe pediatric respiratory tract infections.

We conducted verbal autopsies and abstracted medical records of deceased youth living with HIV to identify missed opportunities for intervention. Of 60 deceased youth, the median age was 20 years, 65% acquired HIV perinatally and 67% were female. Overall, 55% of deaths occurred in hospitals, and 74% had adherence challenges. Mental health challenges and viral failure were key contributors to mortality.

Background: Postexposure prophylaxis (PEP) is critical in preventing HIV acquisition after risky exposures, particularly in pediatric sexual assault victims. Despite its importance, adherence and follow-up remain significant challenges.

Objectives: This study evaluates PEP and follow-up adherence and efficacy among pediatric sexual assault victims treated at a tertiary care hospital in Turkey.

Methods: A retrospective analysis was conducted on 119 pediatric patients 1 month to 18 years of age, treated between September 2017 and September 2022. Data were collected on demographics, PEP initiation and completion, follow-up rates and serologic testing for HIV. PEP compliance, follow-up adherence and outcomes were analyzed.

Results: PEP was initiated in 97% of the eligible 119 patients, with 70% completing the regimen. Compliance showed no significant differences by sex or age. Follow-up adherence decreased progressively, from 55% at the first month to 30% by the sixth month. Nausea and vomiting occurred in one case, indicating a low incidence of side effects. None of the patients seroconverted to HIV.

Conclusion: A structured care system involving multidisciplinary collaboration, pioneered by pediatric infectious diseases, can lead to high PEP initiation and completion rates in children. Single-pill PEP regimens may enhance adherence. However, the decline in follow-up rates underscores the need for improved follow-up mechanisms and future interventions.

Background: Human Adenovirus (HAdV) is a common cause of acute respiratory infections, typically mild in healthy individuals. However, in late 2022, an outbreak of severe acute respiratory infection caused by HAdV emerged among children in Colombia and other countries.

Methods: We described an HAdV outbreak between February 2022 and April 2023. Children with severe acute respiratory infection and HAdV infection confirmed by polymerase chain reaction were included in 4 institutions in Antioquia, Colombia. Our study investigated the clinical manifestations and circulating HAdV genotypes before, during and after this HAdV outbreak.

Results: A total of 133 HAdV cases were analyzed, 37 (27.8%) cases were classified as the preoutbreak group, 88 (66.1%) as the outbreak and 8 (6.0%) as the postoutbreak group. Predominant symptoms were fever (87.0%), rhinorrhea (57.1%) and dyspnea (36.8%). The need for intensive care unit admission and supplemental oxygen increased during the outbreak and peaked in the postoutbreak period. Phylogenetic analysis revealed that 71.4% (10/14) of preoutbreak sequences belonged to genotype HAdV-C89, while during the outbreak, 75.6% (28/37) were HAdV-B3. Clinical symptoms did not significantly differ between HAdV-C89 and HAdV-B3 infections, but children infected with HAdV-B3 were significantly older.

Conclusions: This study highlights the shifting dynamics of HAdV genotypes in children and their epidemiologic impact. The emergence of HAdV-B3 in the post-COVID-19 period contributed to a severe acute respiratory infection outbreak, emphasizing the need for ongoing surveillance.

Background: Visceral Leishmaniasis is a systemic vector-borne infection with a poor prognosis if not treated. Classical antiparasitic therapy with liposomal amphotericin B (LAmB) is effective, but occasionally not well-tolerated.

Case presentation: An 11-month-old male infant was admitted to our hospital due to prolonged fever, following an RSV infection. The patient had pale skin and splenomegaly, but was hemodynamically stable. An infectious cause was investigated through serology for Leishmania species , Brucella melitensis , Toxoplasma gondii , EBV, CMV, PB19 and Salmonella species . After admission, the infant developed Hemophagocytic lymphohistiocytosis (HLH, with pancytopenia, triglycerides: 346 U/L, ferritin: 1071 ng/mL; γ-globulin was administered without clinical response). On the second hospitalization day, the Leishmania rapid test was positive, while blood polymerase chain reaction identified Leishmania Infantum as the cause of infection, and LAmB was initiated. After the 4th dose, the patient developed hypokalemia, bradycardia and premature supraventricular complexes. The arrhythmia persisted despite electrolyte replacement; amphotericin-induced cardiotoxicity was suspected, and LAmB was discontinued. Oral miltefosine was started after approval by the National Public Health Organization, since the medicine was given in Greece for the first time to a pediatric patient. Miltefosine therapy lasted 1 month, with remission. Hepatotoxicity occurred at the end of the treatment and gradually resolved over the following 4 months with complete normalization of hepatic markers. The child remained asymptomatic at the 1-year follow-up.

Conclusions: Leishmaniasis should always be investigated in pediatric patients with secondary HLH, especially in endemic countries. Cardiotoxicity of LAmB is extremely rare; in this case, however, miltefosine is an effective and safe alternative.

Background: Identifying the cause of infection is important for clinical management and public health decisions, including vaccination strategies. In low-resource settings, causes of fever are often not identified. In this study, molecular testing panels were used to identify the causes of pediatric fever in the Kathmandu Valley, Nepal. A dengue fever outbreak facilitated the investigation of dengue diagnostics.

Methods: Children under 14 years of age were recruited to this prospective cohort study at Patan Hospital, Nepal. Clinical data and routine diagnostics were used to classify cases, including nonstructural protein 1 (NS1) antigen testing for dengue. Additional molecular diagnostics were performed on blood (12 viral, 26 bacterial and 6 fungal targets) and respiratory samples (17 viral and 3 bacterial targets).

Results: From September 1, 2021, to April 19, 2023, 565 children were enrolled, median age 3 (interquartile-range 1-7) years. Pathogens identified included dengue virus (n = 101), respiratory syncytial virus (n = 30), influenza (n = 25), typhoidal Salmonella spp. (n = 7) and Neisseria meningitidis (n = 2). During the dengue outbreak, dengue polymerase chain reaction (PCR) and NS1 positivity rates were both high early in dengue disease, but if >3 days of symptoms, PCR positivity rates declined (10.3%) while NS1 positivity remained high into the second week of illness (80%).

Conclusions: This prospective cohort study is the most comprehensive effort to date to describe the causes of pediatric fever in the Kathmandu Valley, Nepal. The United States Centers for Disease Control and Prevention recommends dengue PCR or NS1 antigen testing during the first 7 days of dengue fever. Our data indicate that PCR positivity declines after 3 days of symptoms, resulting in missed cases when relying solely on PCR.