Table 2. Virus transmission rates in single and dual infections.
| Exposure | 3 d.p.i. observed | 3 d.p.i. predicted* | 7 d.p.i. observed | 7 d.p.i. predicted* | 14 d.p.i. observed | 14 d.p.i. predicted* | Total |
|---|---|---|---|---|---|---|---|
| CHIKV only† | 18/105 (17.1%) | − | 28/120 (23.3%) | − | 82/160 (51.3%) | − | 128/385 (33.2%) |
| DENV-2 only† | 0/72 (0%) | − | 11/80 (13.8%) | − | 12/69 (17.4%) | − | 23/221 (10.4%) |
| ZIKV only† | 0/100 (0%) | − | 5/117 (4.3%) | − | 21/144 (14.6%) | − | 26/361 (7.2%) |
| CHIKV+DENV-2‡ | 0/62 (0%) | 0% | 5/80 (6.3%) | 3.2% | 9/80 (11.3%) | 8.9% | 14/222 (6.3%) |
| CHIKV+ZIKV‡ | 1/80 (1.3%) | 0% | 3/80 (3.8%) | 1.0% | 7/120 (5.8%) | 7.5% | 11/380 (2.9%) |
| DENV-2+ZIKV‡ | 0/78 (0%) | 0% | 0/80 (0%) | 0.6% | 7/80 (8.8%) | 2.5% | 7/232 (3%) |
*Predicted probability of co-transmission was calculated by multiplication of single transmission proportions.
†Ae. aegypti exposed to viruses individually; numbers indicate transmission potential for one virus.
‡Ae. aegypti exposed to two viruses; numbers indicate transmission potential for both viruses simultaneously.