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 generationMean engorged weight (mg)+Mean egg mass weight (mg)+Mean CEI+Mean % egg hatching+
Infected Control Infected Control Infected Control Infected Control

F1427.4 ± 145.5479.2 ± 125.9209.3 ± 89.0231.4 ± 92.344.8 ± 11.545.0 ± 15.951.2 ± 29.872.2 ± 10.0*
F2323.3 ± 131.0328.3 ± 215.6164.7 ± 68.2168.7 ± 121.644.2 ± 11.748.5 ± 9.048.7 ± 27.473.6 ± 10.3*
F3412.9 ± 89.7303.1 ± 117.4226.6 ± 63.4158.0 ± 71.954.2 ± 4.450.0 ± 10.171.5 ± 11.873.6 ± 12.5
F4407.0 ± 13.7353.0 ± 11.3218.7 ± 94.9163.0 ± 85.651.6 ± 8.644.3 ± 13.171.0 ± 27.732.0 ± 37.5

Total385.1 ± 136.1375.0 ± 159.9199.7 ± 81.5185.1 ± 95.547.5 ± 10.747.0 ± 12.157.6 ± 27.665.7 ± 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.