Comparative Evaluation of Infected and Noninfected Amblyomma triste Ticks with Rickettsia parkeri, the Agent of an Emerging Rickettsiosis in the New World
Table 3
Reproductive data of Amblyomma triste engorged females infected by Rickettsia parkeri (infected group) and noninfected (control group) through four consecutive generations (F1 to F4) in the laboratory.
Tick generation
Mean engorged weight (mg)+
Mean egg mass weight (mg)+
Mean CEI+
Mean % egg hatching+
Infected
Control
Infected
Control
Infected
Control
Infected
Control
F1
427.4 ± 145.5
479.2 ± 125.9
209.3 ± 89.0
231.4 ± 92.3
44.8 ± 11.5
45.0 ± 15.9
51.2 ± 29.8
72.2 ± 10.0*
F2
323.3 ± 131.0
328.3 ± 215.6
164.7 ± 68.2
168.7 ± 121.6
44.2 ± 11.7
48.5 ± 9.0
48.7 ± 27.4
73.6 ± 10.3*
F3
412.9 ± 89.7
303.1 ± 117.4
226.6 ± 63.4
158.0 ± 71.9
54.2 ± 4.4
50.0 ± 10.1
71.5 ± 11.8
73.6 ± 12.5
F4
407.0 ± 13.7
353.0 ± 11.3
218.7 ± 94.9
163.0 ± 85.6
51.6 ± 8.6
44.3 ± 13.1
71.0 ± 27.7
32.0 ± 37.5
Total
385.1 ± 136.1
375.0 ± 159.9
199.7 ± 81.5
185.1 ± 95.5
47.5 ± 10.7
47.0 ± 12.1
57.6 ± 27.6
65.7 ± 23.5
+values presented as mean ± standard deviation. CEI: conversion efficiency index = egg mass weight/female engorged weight × 100. *means significantly different () values between infected and control groups (horizontal lines) for each tick biological parameter.
