TABLE 3.
Dissemination efficiency of three CHIKV isolates in 22 A. aegypti and 13 A. albopictus populations from 10 American countries at day 10 postinfection
| Country | Mosquito populationa | % dissemination efficiency (no. of mosquitoes)b |
|||||
|---|---|---|---|---|---|---|---|
| CHIKV_0621 |
CHIKV_115 |
CHIKV_NC |
|||||
| A. aegypti | A. albopictus | A. aegypti | A. albopictus | A. aegypti | A. albopictus | ||
| United States | TYS | ND | 93.3 (30) | ND | 63.6 (11) | ND | ND |
| VRB | 100 (30) | 85.7 (7)* | ND | 96.7 (30) | ND | ND | |
| Mexico | MXC | 93.3 (30) | 70.0 (30)* | 100 (30) | 53.3 (30)*** | ND | ND |
| Panama | PAN | 100 (30) | 96.7 (30) | 96.7 (30) | 83.3 (30) | 100 (30) | 96.7 (30) |
| Venezuela | DEL | 100 (10) | ND | 100 (15) | ND | ND | ND |
| Peru | TUM | 100 (30) | ND | ND | ND | ND | ND |
| PUM | 100 (29) | ND | 100 (30) | ND | ND | ND | |
| Brazil | MAN | 100 (30) | 100 (36) | ND | 97.1 (34) | 100 (30) | 93.3 (30) |
| STR | 100 (30) | 100 (20) | ND | ND | ND | ND | |
| PNM | 100 (30) | 90 (30) | ND | ND | ND | ND | |
| CAB | 100 (30) | ND | ND | ND | ND | ND | |
| CPG | 100 (30) | ND | 100 (29) | ND | ND | ND | |
| JRB | 100 (30) | 100 (30) | 100 (30) | ND | ND | ND | |
| PAQ | 100 (30) | 87.5 (32)* | 100 (30) | ND | ND | ND | |
| VAZ | 96.7 (30) | 100 (32) | ND | ND | ND | ND | |
| BEL | 100 (30) | 88.9 (27) | ND | ND | ND | ND | |
| SAN | 100 (29) | 100 (30) | ND | ND | ND | ND | |
| Bolivia | BMA | 100 (30) | ND | 100 (30) | ND | ND | ND |
| Paraguay | SDG | 100 (30) | ND | ND | ND | ND | ND |
| ASU | 100 (30) | ND | 93.3 (30) | ND | ND | ND | |
| Uruguay | SAL | 100 (30) | ND | 100 (30) | ND | ND | ND |
| Argentina | MIA | ND | 93.3 (30) | ND | 80 (30) | ND | 96.7 (30) |
| ACO | 100 (30) | ND | 96.7 (30) | ND | ND | ND | |
| BUE | 96.7 (30) | ND | 100 (30) | ND | 90 (30) | ND | |
Mosquito populations (from north to south): TYS, Tyson, MO; VRB, Vero Beach, FL; MXC, Chiapas, Mexico; PAN, Panamá, Panama; DEL, Delta Amacuro, Venezuela; TUM, Tumbes, Peru; PUM, Punchana, Peru; MAN, Manaus, Brazil; STR, Santarém, Brazil; PNM, Parnamirim, Brazil; CAB, Campos Belos, Brazil; CPG, Campo Grande, Brazil; JRB, Jurujuba; Brazil; PAQ, Paquetá, Brazil; VAZ, Vaz Lobo, Brazil; BEL, Belford Roxo, Brazil; SAN, Santos, Brazil; BMA, Monteagudo, Bolivia; SDG, Salto del Guairá, Paraguay; ASU, Asunción, Paraguay; SAL, Salto, Uruguay; MIA, Misiones, Argentina; ACO, Corrientes, Argentina; BUE, Buenos Aires, Argentina.
Dissemination efficiency corresponds to the proportion of mosquitoes with disseminated virus in heads among tested ones. Numbers of analyzed mosquitoes are shown in parentheses. CHIKV_0621 was isolated from La Réunion (ECSA genotype, E1-226V and E1-98A substitutions), CHIKV_115 was isolated from La Réunion (ECSA genotype, E1-226A and E1-98A substitutions), and CHIKV_NC was isolated from New Caledonia (Asian genotype, E1-226A and E1-98T substitutions). ND, not determined. Statistically significant differences in dissemination efficiencies between the two mosquito species for a given virus are shown by asterisks (*, P < 0.05; ***, P < 0.001).