| Autor: |
CLARKE, FRANCOISE C., ELS, D. A., HELLER-HAUPT, A., RECHAV, Y., VARMA, M. G. R. |
| Zdroj: |
Medical & Veterinary Entomology; Jan1989, Vol. 3 Issue 1, p35-39, 5p |
| Abstrakt: |
ABSTRACT. Acquired immunity in guinea-pigs and rabbits to immature stages of the two-host tick Rhipicephalus evertsi evertsi Neumann was demonstrated. Repeated infestations of both hosts with larvae resulted in a significant reduction in the weight of later engorged nymphs. A sharp decline in the numbers of nymphs which successfully fed on both hosts was also observed. This study provides evidence for a gradual decrease in the mean weight of engorged nymphs towards the end of the detachment period suggesting that, in two-host ticks, the onset of nymphal feeding acts as an immune booster in a host already primed by the larval feed and that this results in a reduced feeding performance. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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