A total of 7.4% of the samples tested were positive for HBoV. No statistically significant differences were seen in the prevalence of HBoV between cases and asymptomatic controls, POR = 0.79 (Table 2) . Peak HBoV infection was observed in children under the age of 5, both in cases and controls, with significantly higher HBoV incidence in children between 1 and 4 in asymptomatic controls than in the cases of gastroenteritis (POR = 0.6; p,0.02). The number of HBoV positives in older age groups was too small for meaningful statistical analysis.