Int. J. Environ. Res. Public Health 2012, 9 900 During March (weeks 11–12) and October (weeks 40–41) a total of 300 (66 children ≤10 years, 12 adolescents aged 11–17 years and 222 adults ≥18 years) and 264 (53 children aged ≤10 years, 13 adolescents aged 11–17 years and 198 adults ≥18 years) patients with gastroenteritis were admitted to GTH and JJH, respectively. Analysis of clinical features of the patients recorded in both outbreaks indicated presence of diarrhea in 95–97.6%, vomiting in 83.3–86.2% and fever in 24–26.2% of the patients. The majority of the patients suffered from the illness for 2 to 3 days. 3.2. Enteric Virus Positivity Of the 218 faecal specimens from the two outbreaks of gastroenteritis, 95 (43.6%) tested positive for enteric virus. These included 46 (63.9%) of 72 and 49 (33.6%) of 146 from March and October, 2006 respectively. Tables 1, 2 show the distribution of single and mixed viruses detected in the two outbreaks Single viral infections of RVAs and EVs predominated in both outbreaks. Other viruses (RVBs, NoVs, AdVs, HAstVs and AiVs) were detected at lower levels (Table 1). The majority (84.6% and 88.9%) of patients with mixed enteric viral infections showed the presence of two viruses in both outbreaks. Mixed infections with three viruses were detected only in 7.7% and 11.1% of the patients. An infant, aged 10 months admitted to GTH in March showed infection with four viruses (Table 2). Table 1. Distribution of single enteric viruses detected in the outbreak cases of gastroenteritis. Enteric virus RVA RVB NoV AdV HAstV EV AiV No. positive (%) March 2006 (n = 33) October 2006 (n = 40) 11 (33.3) 10 (25) 4 (12.1) 4 (10) 4 (12.1) 4 (10) 2 (6.1) 3 (7.5) 1 (3) 0 10 (30.3) 16 (40) 1 (3) 3 (7.5) Table 2. Distribution of mixed enteric viruses detected in the outbreak cases of gastroenteritis. AdV HAstV EV Period of outbreak March, 2006 (n = 13) M-689 M-791 M-633 M-705 M-693 M-636 M-778 M-651 M-777 M-771 M-714 M-635 M-634 RVA + + + + + + + + RVB + + + NoV + + + + + + + + + + + + + + + + + +