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Table 1 Transmission efficiencies of infected fleas held at different experimental temperatures during the late phase period

From: Effects of temperature on the transmission of Yersinia Pestis by the flea, Xenopsylla Cheopis, in the late phase period

Temp (°C)

Days p.i.

Flea infection prevalence (%)

Average no. fed, infected fleas per mouse (total in treatment group)

No. of mice infected (exposed)

Percent per flea transmission efficiency (95% CI)

10

7

100

5.0 (35)

3 (7)

9.81 (2.74, 25.74)

 

10

97.1

5.8 (35)

1 (6)

2.75 (0.17, 12.75)

 

14

75.9

6.8 (54)

3 (8)

6.31 (1.75, 16.31)

23

7

88.6

6.3 (44)

0 (7)

0 (0, 6.60)

 

10

95.2

6.0 (42)

4 (7)

12.48 (4.33, 30.48)

 

14

92.3

5.6 (39)

4 (7)

14.11 (4.73, 34.11)

 

17

100

4.3 (30)

4 (7)

17.42 (6.04, 37.42)

 

21

94.1

4.9 (34)

5 (7)

21.77 (8.67, 48.81)

 

28

79.2

4.0 (24)

1 (6)

4.27 (0.25, 20.27)

27

7

98.1

6.5 (52)

0 (8)

0 (0, 5.80)

 

10

96.9

4.6 (32)

2 (7)

7.04 (1.30, 23.02)

 

14

92.3

5.6 (39)

1 (7)

2.52 (0.15, 11.93)

 

17

85.7

4.0 (28)

3 (7)

15.41 (4.03, 44.01)

 

21

83.8

5.3 (37)

4 (7)

13.50 (4.75, 31.81)

 

28

61.9

5.3 (21)

0 (4)

0 (0, 11.67)

30

7

95.0

5.6 (39)

0 (7)

0 (0, 7.46)

 

10

100

5.3 (37)

3 (7)

9.47 (2.64, 25.19)

 

14

95.4

6.1 (43)

3 (7)

8.30 (2.32, 22.62)

 

17

100

4.1 (29)

2 (7)

7.67 (1.42, 24.58)

 

21

93.3

5.0 (30)

0 (6)

0 (0, 9.03)

 

28

91.2

6.8 (34)

1 (5)

2.72 (0.18, 12.69)