Table 1.
Descriptive measures and infection rates in Aedes aegypti males collected indoors in houses of suspected ABV-infected cases from Yucatán, Mexico, 2016–2017
| Entomologic measure | Collection year | Total | |
|---|---|---|---|
| 2016 | 2017 | ||
| # of houses screened | 83 | 117 | 200 |
| # of infested houses with Ae. aegypti (% of infested houses) | 72 (86.7%) | 107(91.4%) | 179 (89.5%) |
| # of infested houses with Ae. aegypti females (% of positive houses) | 66 (91.7%) | 103 (96.3%) | 169 (94.4%) |
| # of infested houses with Ae. aegypti males (% of positive houses) | 56 (77.8%) | 87 (84.5%) | 143 (79.9%) |
| Total # of Ae. aegypti | 1,341 | 2,098 | 3,439 |
| # of Ae. aegypti females (% of females) | 851 (63.5%) | 1,310 (62.4%) | 2,161 (62.8%) |
| # of Ae. aegypti males (% of males) | 490 (36.5%) | 788 (37.5%) | 1,278 (37.2%) |
| Sex ratio F:M | 1.7:1 | 1.7:1 | 1.7:1 |
| Ae. aegypti males | |||
| # of positive Ae. aegypti males for any virus (% males tested) | 75 (15.3%) | 11 (1.4%) | 86 (6.7%) |
| # of positive Ae. aegypti males for CHIKV (% males tested) | 73 (14.9%) | 0 (0%) | 73 (5.7%) |
| # of positive Ae. aegypti males for DENV (% males tested) | 2 (0.4%) | 10 (1.3%) | 12 (0.9%) |
| # of positive Ae. aegypti males for ZIKV (% males tested) | 0 (0%) | 1 (0.1%) | 1 (0.1%) |
| Fraction of each virus to all ABV positive male mosquitoes (CHIKV, DENV, ZIKV) | (98.6%, 2.6%, 0%) | (0%, 90.9%, 9.9%) | (84.8%, 13.9%, 1.1%) |
| # of houses with positive Ae. aegypti (+) for any virus (% of tested mosquitoes/infested houses) | 30 (41.6%) | 22 (20.5%) | 52 (29.5%) |
| # of houses with positive Ae. aegypti males (+) for any virus (% of males tested/infested houses with males) | 23 (41.1%) | 7 (8.0%) | 30 (21.0%) |
| # of houses (+) CHIKV (% of males tested/infested houses with males) | 21 (37.5%) | 0 (0%) | 21 (14.7%) |
| # of houses (+) DENV (% of males tested/infested houses with males) | 1 (1.8%) | 6 (6.9%) | 7 (4.9%) |
| # of houses (+) ZIKV (% of males tested/ infested houses with males) | – | – | – |
| # of houses (+) ZIKV + DENV (% of males tested/ infested houses with males) | 0 (0%) | 1 (1.1%) | 1 (0.7%) |
| # of houses (+) CHIKV + DENV (% of males tested/ infested houses with males) | 1 (1.8%) | 0 (0%) | 1 (0.7%) |