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Development of resistance to nymphs of Amblyomma cajennense ticks (Acari : Ixodidae) in dogs

Mukai, Luciana S.; Castro Netto, A.; Szabó, M. P J; Bechara, G. H.
Fonte: New York Acad Sciences Publicador: New York Acad Sciences
Tipo: Conferência ou Objeto de Conferência Formato: 180-183
ENG
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Ticks have long been regarded as constraints to humans and domestic animals, but hosts often develop resistance to ticks after repeated infestations. The purpose of this investigation was to study the possible acquisition of immunity in domestic dogs to nymphs of A. cajennense by determining the tick alimentary performance after successive controlled infestations. Mean engorged weight of nymphs was not significantly different among the three infestations; molting rate from nymph to adult ticks, and the percentage of nymph recovery were also very close in all infestations. These results are similar to those obtained in studies of the dog-adult Rhipicephalus sanguineus interface. It is concluded that domestic dogs do not develop resistance against nymphs of A. cajennense ticks.