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Volume 17, Number 5—May 2011

Research

Experimental Infection of Amblyomma aureolatum Ticks with Rickettsia rickettsii

Marcelo B. LabrunaComments to Author , Maria Ogrzewalska, João F. Soares, Thiago F. Martins, Herbert S. Soares, Jonas Moraes-Filho, Fernanda A. Nieri-Bastos, Aliny P. Almeida, and Adriano Pinter
Author affiliations: Author affiliations: University of São Paulo, São Paulo, Brazil (M.B. Labruna, M. Ogrzewalska, J.F. Soares, T.F. Martins, H.S. Soares, J. Moraes-Filho, F.A. Nieri-Bastos, A.P. Almeida); Superintendency of Control of Endemic Diseases, São Paulo (A. Pinter)

Main Article

Table 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.

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