Volume 17, Number 5—May 2011
Research
Experimental Infection of Amblyomma aureolatum Ticks with Rickettsia rickettsii
Marcelo B. Labruna
, Maria Ogrzewalska, João F. Soares, Thiago F. Martins, Herbert S. Soares, Jonas Moraes-Filho, Fernanda A. Nieri-Bastos, Aliny P. Almeida, and Adriano Pinter
, Maria Ogrzewalska, João F. Soares, Thiago F. Martins, Herbert S. Soares, Jonas Moraes-Filho, Fernanda A. Nieri-Bastos, Aliny P. Almeida, and Adriano PinterTable A1
Reproductive data of Amblyomma aureolatum engorged female ticks infected by Rickettsia rickettsii (infected group) and noninfected (control group) through 3 consecutive generations in the laboratory*
| Tick generation | Engorged weight, mg |
Egg mass weight, mg |
% Egg hatching |
CEI |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Infected | Control | Infected | Control | Infected | Control | Infected | Control | ||||
| F1 | 849.0 ± 218.5 (375.2–1,220.9) | 968.2 ± 258.8 (509.0–1,517.3) | 278.0 ± 129.3 (60.2–466.2) | 430.1 ± 185.6† (152.1–703.0) | 29.3 ± 27.7 (0–90) | 13.5 ± 9.1 (1–40) | 34.7 ± 13.4 (5.9–51.2) | 43.9 ± 12.9 (22.0–61.0) | |||
| F2 | 740.0 ± 203.9 (332.5–1,034.2) | 474.6 ± 197.9† (198.0–856.4) | 141.0 ± 113.0 (23.1–338.9) | 221.3 ± 94.9 (60.7–314.0) | 71.0 ± 37.2 (0–100) | 74.3 ± 27.7 (30–100) | 21.0 ± 16.5 (5.2–50.2) | 43.5 ± 7.2† (30.6–51.8) | |||
| F3 |
615.8 ± 138.2
(410.0–790.0) |
1045.3 ± 118.5†
(890.0–1,213.0) |
337.5 ± 138.3
(189.0–487.0) |
413.6 ± 241.6
(122.0–740.0) |
62.0 ± 27.1
(20–100) |
47.0 ± 39.6
(1–95) |
52.3 ± 6.5
(44.1–61.6) |
37.8 ± 20.5
(13.3–61.0) |
|||
| Total | 766.5 ± 219.4 (332.5–1,220.9) | 833.6 ± 323.3 (198.0–1,517.3) | 260.4 ± 138.6 (23.1–487.0) | 370.1 ± 203.2† (60.7–740.0) | 46.2 ± 35.4 (0–100) | 37.6 ± 35.8 (1–100) | 35.6 ± 16.8 (5.2–61.6) | 42.4 ± 14.1 (13.3–61.0) | |||
*Values are mean ± standard error (range). CEI, conversion efficiency index = egg mass weight/female engorged weight × 100.
†Significantly different (p<0.05) values between infected and control groups for each tick biologic parameter.
