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 (owl; Fig. 4A) | |||||||||
0 | ND | 54 | 100 | 4.9 × 103 | – | – | – | – | – |
3 | 29 | 25 | ND | ND | 0 | 0 | 0 | 0 | 0 |
6 | 21 | 19 | ND | ND | 0 | 4 | 21 | 0 | 0 |
8 | 17 | 13 | ND | ND | 1 | 3 | 31 | 59 | 4.5 |
10 | 8 | 7 | 50 | 2.9 × 106 | 0 | 0 | 0 | 0 | 0 |
Exp #2 (owl; Fig. 4B) | |||||||||
0 | ND | 57 | 100 | 6.1 × 104 | – | – | – | – | – |
3 | 36 | 36 | ND | ND | 0 | 4 | 11 | 23 | 0.6 |
6 | 19 | 19 | ND | ND | 0 | 0 | 0 | 107 | 5.6 |
8 | 11 | 11 | 89 | ND | 3 | 4 | 64 | 306 | 28 |
10 | 4 | 4 | 100 | 4.2 × 106 | 0 | 1 | 25 | 97 | 24 |
Exp #3 (fox; Fig. 4C) | |||||||||
0 | ND | 108 | 100 | 2.1 × 104 | – | – | – | – | – |
3 | 97 | 90 | 100 | 3.3 × 106 | 0 | 1 | 1 | 81 | 0.9 |
5 | 94 | 30 | 92 | 1.9 × 106 | 0 | 7 | 23 | 0 | 0 |
7 | 55 | 43 | 90 | 2.3 × 106 | 0 | 0 | 0 | 0 | 0 |
9 | 30 | 26 | ND | ND | 4 | 1 | 19 | 7 | 0.3 |
11 | 20 | 14 | ND | ND | 1 | 0 | 7 | 4 | 0.3 |
13 | 11 | 6 | 58 | 3.4 × 105 | 0 | 0 | 0 | 0 | 0 |
Exp #4 (fox; Fig. 4D) | |||||||||
0 | ND | 111 | 100 | 5.3 × 103 | – | – | – | – | – |
2 | 101 | 78 | 88 | 1.9 × 106 | 0 | 0 | 0 | 3 | 0.04 |
4 | 73 | 61 | ND | ND | 0 | 0 | 0 | ND | ND |
6 | 48 | 41 | ND | ND | 1 | 0 | 2 | 25 | 0.6 |
8 | 39 | 32 | ND | ND | 1 | 1 | 3 | 27 | 0.8 |
10 | 22 | 15 | ND | ND | 1 | 0 | 7 | 0 | 0 |
12 | 10 | 6 | 58 | 2.9 × 106 | 0 | 0 | 0 | 0 | 0 |
Exp #5 (fox; Fig. 4E) | |||||||||
0 | ND | 124 | 88 | 3.7 × 103 | – | – | – | – | – |
2 | 117 | 94 | ND | ND | 0 | 0 | 0 | 0 | 0 |
4 | 74 | 58 | 20 | 5.4 × 105 | 0 | 0 | 0 | 0 | 0 |
6 | 63 | 53 | ND | ND | 0 | 0 | 0 | 0 | 0 |
8 | 45 | 35 | ND | ND | 0 | 0 | 0 | 0 | 0 |
10 | 42 | 22 | ND | ND | 0 | 1 | 5 | 2 | 0.1 |
12 | 37 | 25 | ND | ND | 0 | 0 | 0 | 0 | 0 |
14 | 49 | 22 | ND | ND | 0 | 0 | 0 | 0 | 0 |
16 | 53 | 47 | ND | ND | 0 | 0 | 0 | 0 | 0 |
18 | 45 | 15 | ND | ND | 0 | 0 | 0 | 0 | 0 |
20 | 44 | 36 | ND | ND | 0 | 0 | 0 | 0 | 0 |
22 | 38 | 9 | ND | ND | 0 | 0 | 0 | 0 | 0 |
24 | 36 | 35 | ND | ND | 0 | 0 | 0 | 0 | 0 |
26 | 35 | 30 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |