Table 2. Cont. RVB NoV AdV HAstV + + + + + + + + + RVA + + + + + + EV + + + + Period of outbreak October, 2006 (n = 9) M-836 M-859 M-029 M-038 M-308 M-864 M-857 M-361 M-364 3.3. Age Distribution Enteric virus positivity was not different in children and adults, however was higher as compared to that of adolescents in both outbreaks (45.7% and 50% vs. 4.3% in March, 49% and 49% vs. 2% in October). 3.4. Nucleotide Sequencing and Phylogenetic Analyses The partial regions of conserved and/or variable genes of all of the enteric viruses detected in single and mixed infections were sequenced and analyzed phylogenetically. Int. J. Environ. Res. Public Health 2012, 9 901 Phylogenetic analysis of NSP2 gene (229 bp) sequences of all 11[seven (March) and four (October)] RVB strains showed clustering with the strains from Indian-Bangladeshi lineage of genotype G2 (Figure 3, Table 3). The nucleotide identity with the Indian, Bangladeshi and Myanmarese strains was noted to be 99.1–100% while it was 92.9–94.7% with Chinese strains (ADRV and WH-1). 3.4.1. RVA 3.4.2. RVB Of the 35 [nineteen (March) and sixteen (October)] RVA strains sequenced for VP6 gene (220 bp), 19 [54.3%, four (March) and fifteen (October)] and 8 [22.8%, seven (March) and one (October) showed 91.5–100% nucleotide identities with reference human RVA strains. Five (14.2%) and 3 (8.5%) strains, all from March, were closer to simian and bovine strains of RVAs, respectively, with 89.4–100% nucleotide identities (Figure 2). Eleven (31.4%, all from October) and 20 [57.1%, ten (March) and ten (October)] of 35 strains were typed for VP7 (G) and VP4 (P) genes, respectively, while 10 (28.6%) all from October were typed for both genes. Distribution of genotypes of RVAs detected in the cases of gastroenteritis from March and October is shown in Table 3.