Table 4. Summary of the maximum likelihood estimates (MLEs) of the mosquito Japanese encephalitis virus (JEV) infection rate per year, and the mosquito collection sites (all sites, northern, central, southern, and eastern regions).
| All sites | Northern | Central | Southern | Eastern | ||||||
| Year/Region | IR (95%CI); No. positive pools/No. pools/No. individuals1 | No. GI/No. GIII2 | IR (95%CI); No. positive pools/No. pools/No. individuals | No. GI/No. GIII | IR (95%CI); No. positive pools/No. pools/No. individuals | No. GI/No. GIII | IR (95%CI); No. positive pools/No. pools/No. individuals | No. GI/No. GIII | IR (95%CI); No. positive pools/No. pools/No. individuals | No. GI/No. GIII |
| 2005 | 12.12 (10.57–13.85); 206/742/20020 | 0/99 | 16.31 (13.70–19.31); 128/340/9810 | 0/39 | 6.06 (4.32–8.30); 36/218/6478 | 0/26 | 6.66 (3.87–10.83); 15/97/2562 | 0/15 | 27.68 (19.10–39.27); 27/87/1170 | 0/19 |
| 2006 | 5.35 (3.91–7.17); 42/236/8659 | 0/42 | 10.32 (7.17–14.52); 31/92/3613 | 0/31 | 3.84 (1.97–6.86); 10/73/2785 | 0/10 | 0 (0.00–3.70); 0/24/960 | 0/0 | 0.77 (0.04–3.75); 1/47/1301 | 0/1 |
| 2007 | 0.59 (0.11–1.93); 2/87/3410 | 0/2 | 5.04 (0.30–25.91); 1/7/202 | 0/1 | 0 (0.00–2.93); 0/31/1240 | 0/0 | 0 (0.00–2.81); 0/32/1288 | 0/0 | 1.47 (0.09–7.20); 1/17/680 | 0/1 |
| 2008 | 11.04 (8.08–14.81); 42/159/4454 | 2/40 | 19.45 (13.24–27.96); 28/64/1894 | 2/26 | 7.10 (2.93–14.86); 6/35/921 | 0/6 | 3.38 (1.10–8.14); 4/43/1229 | 0/4 | 11.02 (3.63–27.09); 4/17/410 | 0/4 |
| 2009 | 2.05 (1.60–2.60); 65/801/33039 | 14/33 | 1.77 (1.27–2.40); 38/548/22326 | 6/15 | 3.56 (1.76–6.54); 9/61/2699 | 8/0 | 0.16 (0.01–0.80); 1/143/6064 | 0/1 | 10.48 (6.39–16.50); 17/49/1950 | 0/17 |
| 2010 | 3.27 (2.50–4.22); 56/482/18385 | 46/10 | 4.31 (2.60–6.78); 17/118/4355 | 17/0 | 7.13 (4.39–11.09); 18/75/2924 | 11/7 | 0.60 (0.25–1.24); 6/260/10097 | 3/3 | 23.17 (13.34–39.37); 15/29/1009 | 15/0 |
| 2011 | 6.01 (4.21–8.37); 33/146/6314 | 33/0 | 3.08 (1.72–5.15); 13/107/4522 | 13/0 | 15.87 (9.99–24.63); 20/39/1792 | 20/0 | ND | ND | ||
| 2012 | 7.54 (5.71–9.81); 53/195/8352 | 51/2 | 5.36 (3.49–7.94); 23/118/4854 | 21/2 | 7.35 (4.22–12.12); 14/45/2238 | 14/0 | 17.00 (5.76–45.24); 4/8/310 | 4/0 | 18.57 (10.15–33.02); 12/24/950 | 12/0 |
| Total | 5.35 (4.90–5.83); 499/2848/102633 | 146/228 | 6.01 (5.34–6.74); 279/1394/51576 | 59/114 | 6.02 (4.99–7.22); 113/577/21077 | 53/49 | 1.37 (0.94–1.93); 30/607/22510 | 7/23 | 12.48 (9.97–15.50); 77/270/7470 | 27/42 |
1
The maximal likelihood estimation of the JEV infection rate per 1000 mosquitoes and the 95% confidence interval (lower limit-upper limit); and the number of JEV positive pools/the number of pools tested/the number of mosquitoes tested by RT-PCR.
2
Numbers of Genotype I and genotype III JEV positive pools determined by RT-PCR and DNA sequencing.