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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/37145
Title: 
Acquired resistance of horses to Amblyomma cajennense (Fabricius, 1787) ticks
Author(s): 
Institution: 
  • Univ Franca
  • Universidade Estadual Paulista (UNESP)
ISSN: 
0304-4017
Abstract: 
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.
Issue Date: 
28-Nov-2003
Citation: 
Veterinary Parasitology. Amsterdam: Elsevier B.V., v. 117, n. 4, p. 271-283, 2003.
Time Duration: 
271-283
Publisher: 
Elsevier B.V.
Keywords: 
  • Amblyommna cajennense
  • donkey
  • horse
  • resistance
  • ixodidae
Source: 
http://dx.doi.org/10.1016/j.vetpar.2003.09.004
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/37145
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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