Table 3. Yearly prevalence of RSV subgroups (A/B) and genotypes in Nha Trang, Khanh Hoa province during January 2010–December 2012.
| Pediatric ARI cases admitted to KHGH# (Jan 2010–Dec 2012) | |||
|---|---|---|---|
| Year of sample collection | 2010 (Jan–Dec) | 2011 (Jan–Dec) | 2012 (Jan–Dec) |
| Total ARI cases (n = 1854) | (n = 542) | (n = 513) | (n = 799) |
| RSV positive ARI cases (n = 426) | n = 135 (24.9%) | n = 80 (15.6%) | n = 211 (26.4%) |
| RSV subgroup A | 63 (46.7%) | 32 (40.0%) | 158 (74.9%) |
| RSV subgroup B | 38 (28.2%) | 25 (31.3%) | 14 (6.6%) |
| RSV-A and B mixed-infection | 3 (2.2%) | 2 (2.5%) | 11 (5.2%) |
| p-value¶ | p = 0.711† | p < 0.001§ | |
| (Not classified) | 31 (23.0%) | 21 (26.3%) | 28 (13.3%) |
| RSV-A genotype (n = 269) | (n = 66) | (n = 34) | (n = 169) |
| NA1 genotype | 66 (100%) | 34 (100%) | 38 (22.5%) |
| ON1 genotype | 0 | 0 | 123 (72.8%) |
| (Not classified) | 0 | 0 | 8 (4.7%) |
| RSV-B genotype (n = 93) | (n = 41) | (n = 27) | (n = 25) |
| BA9 genotype | 31 (75.6%) | 17 (63.0%) | 9 (36.0%) |
| BA10 genotype | 6 (14.6%) | 6 (22.2%) | 0 |
| BA-C genotype | 1 (2.4%) | 3 (11.1%) | 8 (32.0%) |
| (Not classified) | 3 (7.3%) | 1 (3.7%) | 8 (32.0%) |
| Total RSV-A&B genotype confirmed | n = 107 (in 2010) | n = 61 (in 2011) | n = 194 (in 2012) |
#KHGH is abbreviation for Khanh Hoa General Hospital in Nha Trang city, Khanh Hoa province.
¶For the statistical tests for RSV subgroups (A/B) proportion comparison among sampling years, two-tailed Fisher’s exact tests were performed. Statistically significant p-value was indicated in bold font.
†p-value was for RSV subgroups (A/B) proportion comparison between year of 2010 and 2011.
§p-value was for RSV subgroups (A/B) proportion comparison among 2010, 2011 and 2012.