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 2
Molting and oviposition success of Amblyomma aureolatum ticks infected by Rickettsia rickettsii (infected group) and noninfected (control group) through 4 consecutive generations (F1 to F4) in the laboratory*
| Tick generation |
No. larvae that molted to nymphs/ no. recovered engorged larvae (% molting success) | No. nymphs that molted to adults/ no. recovered engorged nymphs (% molting success) | No. females that oviposited/ no. recovered engorged females (% oviposition success) | |||||
|---|---|---|---|---|---|---|---|---|
| Infected |
Control |
Infected |
Control |
Infected |
Control |
|||
| F1 | 632/679 (93.1) | 226/250 (90.4) | 68/71 (95.8) | 25/29 (86.2) | 12/16 (75) | 13/13 (100) | ||
| F2 | 300/349 (86.0) | 791/959 (82.5) | 57/60 (95.0) | 24/28 (85.7) | 5/10 (50) | 7/9 (77.8) | ||
| F3 | 292/443 (65.9) | 737/1,179 (62.5) | 49/110 (44.5) | 51/68 (75.0)† | 5/7 (71.4) | 6/7 (85.7) | ||
| F4 |
721/1,278 (56.4) |
868/1,358 (63.9)† |
138/148 (93.2) |
46/52 (88.5) |
– |
– |
||
| Total | 1,945/2,749 (70.7) | 2,622/3,746 (70.0) | 312/389 (80.2) | 146/177 (82.5) | 22/33 (66.7) | 26/29 (89.7)† | ||
*–, data not collected.
†Molting or oviposition success values for infected and control ticks of the same tick stage were significantly different (p<0.05).
