The incidence of sporadic GII norovirus gastroenteritis associated with hospitalization was examined among 515 children aged <5 years in a prospective study in Israel. Using real-time polymerase chain reaction, norovirus was detected in stools of 89 (17.3%) children, yielding an estimated incidence of 3.3 per 1000 children. Genotypes GII.3 (40.4%) and GII.4a (21.3%) predominated, though year-to-year variation was observed.
From the *Department of Epidemiology and Preventive Medicine, School of Public Health, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel; †Department of Medicine, Center for Vaccine Development, School of Medicine, University of Maryland, Baltimore, MD; ‡Departments of Pediatrics Hillel Yaffe Medical Center, Hadera; §Departments of Pediatrics Laniado Medical Center, Natanya; ¶Medical Central Virology Laboratory, Ministry of Health, Tel Hashomer; ‖Pediatric Infectious Disease Unit, Carmel Medical Center, Haifa; **Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.
The first year of the study was supported by the Department of Immunization, Vaccination and Biologicals, World Health Organization (V27-181-190).
The authors have no other funding or conflicts of interest to disclose.
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Address for correspondence: Khitam Muhsen, PhD, Center for Vaccine Development, University of Maryland, School of Medicine, 685 West Baltimore Street, HSF-II room 480, Baltimore, MD 21201. E-mail: firstname.lastname@example.org, email@example.com.