Table 3 Transmission by Pulex irritans infected using rat blood and fed sterile rat blood daily starting from day 2 after infection (group III)
From: Poor vector competence of the human flea, Pulex irritans, to transmit Yersinia pestis
Day post-infection | Total fleas | Fed flea number | Infection rate (%) | Mean CFU/flea | Blocked (B) fleas | Partially blocked (PB) fleas | B + PB fleas (%) | Total CFU transmitted | CFU transmitted per fed flea |
|---|---|---|---|---|---|---|---|---|---|
Exp #1 (fox; Fig. 3) | |||||||||
0 | ND | 92 | 70 | 3.4 × 104 | – | – | – | – | – |
2 | 90 | 77 | 80 | 1.1 × 106 | 0 | 0 | 0 | 12 | 0.15 |
8 | 59 | 44 | 50 | 4.6 × 106 | 0 | 0 | 0 | 0 | 0 |
15 | 34 | 25 | 36 | 2.6 × 106 | 0 | 0 | 0 | 41 | 1.6 |