Pediatric Hepatitis and Respiratory Viruses: A Spatiotemporal Ecologic Analysis

Area of Science:

• Pediatric infectious diseases
• Epidemiology
• Virology

Background:

• Clusters of severe pediatric hepatitis emerged globally in early 2022.
• The exact cause remains unidentified, with human adenovirus 41 suggested in some cases.
• This study focuses on Australian pediatric hepatitis cases.

Purpose of the Study:

• To investigate spatiotemporal associations between pediatric hepatitis clusters and common respiratory viruses in Victoria, Australia.
• To determine if respiratory adenoviruses or SARS-CoV-2 are linked to these hepatitis clusters.
• To analyze population data for potential links between hepatitis and viral respiratory infections.

Main Methods:

• Utilized SaTScan software for spatiotemporal cluster analysis of pediatric hepatitis and respiratory viruses.
• Employed negative binomial regression to assess associations between hepatitis and respiratory viruses.
• Analyzed data from Victoria, Australia, spanning July 1, 2011, to June 30, 2022.

Main Results:

• Identified positive spatiotemporal associations between pediatric hepatitis clusters and common respiratory viruses.
• Found no significant association between hepatitis clusters and respiratory adenoviruses or SARS-CoV-2.
• Observed an increase in hepatitis clusters in 2021 and 2022, consistent with international trends.

Conclusions:

• The novel hepatitis outbreak shows broad associations with respiratory viruses.
• Respiratory adenoviruses and SARS-CoV-2 are unlikely to be the primary drivers of this hepatitis outbreak.
• Further research is needed to elucidate the specific causative agents and mechanisms.