Cutaneous basophilia in the resistance of goats to Amblyomma cajennense nymphs after repeated infestations

Annals of the New York Academy of Sciences
Gaby Ermelindo Roberto Monteiro, G H Bechara

Abstract

The acquisition of resistance in goats against Amblyomma cajennense after repeated infestations and the role of inflammatory cells in this mechanism were investigated. Ten naive goats aged 6 months were distributed into two groups: test (n= 5), infested thrice at 30-day intervals; and control (n= 5), infested once. Nymphs (n= 115 per animal per infestation) were released inside alimentary chambers glued to the animal's dorsum and the following biological parameters were evaluated: yielding rate, nymphal engorgement weight, engorgement period, ecdise rate, and ecdise period. Skin fragments of tick bite sites were collected at 24, 48, 72, and 120 h post attachment for histopathology and inflammatory cells counts. The engorgement weight decreased significantly (P < 0.05) from the first infestation onward; nymphs weighed 41.7% and 37.1% less after the second and third infestations, respectively, as compared to those collected after the first infestation (12.55 mg +/- 3.21). Furthermore, the ecdise period increased significantly (P < 0.05) in the third infestation (18 days +/- 2.83) in comparison with the first infestation (15 days +/- 0.82) and the ecdise rate was significantly lower after the second infestation (71.91%+/- 17.38) i...Continue Reading

References

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Citations

Jul 29, 2010·The Journal of Clinical Investigation·Booki Min
Jan 9, 2014·The Onderstepoort Journal of Veterinary Research·Jeyanthi B P GopalrajEdward F Donkin
Jul 21, 2015·Journal of Proteomics·Jan KotálJindřich Chmelař
Jun 12, 2010·Transboundary and Emerging Diseases·C C ProsdocimiR E Del Vecchio
Jul 3, 2010·Experimental & Applied Acarology·Gaby Ermelindo Roberto MonteiroIsabel Kinney Ferreira de Miranda Santos
Sep 24, 2013·Experimental & Applied Acarology·Munyaradzi C MarufuMichael Chimonyo
Oct 31, 2020·Parasite Immunology·Soichiro YoshikawaHajime Karasuyama
Nov 7, 2020·Frontiers in Immunology·Hajime KarasuyamaSoichiro Yoshikawa
Jun 3, 2021·Trends in Immunology·Chrysoula KitsouUtpal Pal

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