Table 1. Nonviremic transmission of WNV between Cx. p. quinquefasciatus mosquitoes.
| Days p.i. of donor mosquitoes (experiment) | Infectious blood meal virus titer/ml | Mean donor whole body virus titer* | No. of donors engorged | No. of recipients infected/n (%)† | Mean recipient whole body titer (n)† |
|---|---|---|---|---|---|
| 7 (1a) | 7.95 | 5.49 ± 0.88 | 48 | 2/36 (5.6) | 4.29 ± 4.57 (2) |
| 14 (1b) | 7.95 | 5.67 ± 1.66 | 39 | 10/173 (5.8) | 4.55 ± 2.27 (10) |
| 14 (2) | 8.52 | 6.70 ± 0.62 | 7 | 1/50 (2.0) | 4.52 ± 0.00 (1) |
| 14 (3) | 8.95 | 6.09 ± 0.55 | 57 | 3/124 (2.4) | 5.47 ± 0.50 (3) |
| 14 (4) | 7.95 | 5.95 | 1 | 2/87 (2.3) | 4.74 ± 0.30 (2) |
All titers are expressed as tissue culture infectious dose endpoints (log10 TCID50 per ml or per mosquito).
*
Mean whole body titer based on TCID50 of 20 donor mosquitoes with blood in gut from cofeed (except for experiments 2 and 4, which had only 7 and 1 infected mosquitoes engorged on the mouse, respectively).
†
Recipients tested on day 14 subsequent to cofeeding with donors.