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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/37145
Título: 
Acquired resistance of horses to Amblyomma cajennense (Fabricius, 1787) ticks
Autor(es): 
Instituição: 
  • Univ Franca
  • Universidade Estadual Paulista (UNESP)
ISSN: 
0304-4017
Resumo: 
Acquired immunity of horses to larvae, nymphs and adults of the Amblyomma cajennense tick was evaluated through three consecutive experimental infestations of tick-bite naive hosts. Data from these infestations were compared to those from field-sensitized horses and donkeys. It was observed that tick-bite naive horses developed a low level of resistance after two infestations as shown by a significant decrease in larval yield and a tendency for lower engorged weight of nymphs during third infestation. Ticks fed on field-sensitized horses had a similar biological performance to that observed on the third infestation of tick-bite naive horses but the mean engorged nymph weight was significantly lower than that of the first infestation from tick-bite naive horses. Donkeys presented the strongest resistance with significantly lower engorged weights of all instars and of the egg mass compared to the first infestation of tick-bite naive horses. Donkeys also displayed a significantly higher resistance than field-sensitized horses as demonstrated by significantly lower egg mass weights. Overall these results indicate that donkeys but not horses maintain a strong resistance to A. cajennense ticks. The importance of these findings in relation to vectoring of tick-borne diseases is discussed. (C) 2003 Elsevier B.V. All rights reserved.
Data de publicação: 
28-Nov-2003
Citação: 
Veterinary Parasitology. Amsterdam: Elsevier B.V., v. 117, n. 4, p. 271-283, 2003.
Duração: 
271-283
Publicador: 
Elsevier B.V.
Palavras-chaves: 
  • Amblyommna cajennense
  • donkey
  • horse
  • resistance
  • ixodidae
Fonte: 
http://dx.doi.org/10.1016/j.vetpar.2003.09.004
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/37145
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