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Published on: February 20, 2015
Acute dermatitis caused by Amblyomma variegatum larvae on chickens
1Department of Veterinary Pathology and Microbiology, University of Nigeria, Nsukka, Nigeria.
Avian Pathology : Journal of the W.V.P.A
|October 1, 1990
Summary
Larval Amblyomma variegatum ticks caused acute dermatitis in Nigerian chickens. Histopathology revealed skin hemorrhages and inflammation, suggesting free-range conditions contributed to this infestation.
Area of Science:
- Veterinary Dermatology
- Parasitology
- Poultry Science
Background:
- Amblyomma variegatum is a significant tick vector in tropical regions.
- Poultry farming, especially free-range systems, can increase exposure to ectoparasites.
- Dermatitis in chickens can lead to significant economic losses in the poultry industry.
Purpose of the Study:
- To document and characterize acute dermatitis in Nigerian chickens caused by Amblyomma variegatum larvae.
- To investigate the pathological changes associated with this specific parasitic infestation.
- To identify potential risk factors contributing to the outbreak.
Main Methods:
- Gross examination of affected adult local Nigerian chickens.
- Detailed histopathological analysis of skin lesions.
- Observation and documentation of parasitic larvae within the lesions.
Main Results:
- Acute dermatitis was confirmed, directly linked to Amblyomma variegatum larvae infestation.
- Skin lesions exhibited hemorrhages, presence of numerous larvae, necrosis, and eosinophilic infiltration.
- Free-range housing system was identified as a likely predisposing factor for the infestation.
Conclusions:
- Larval Amblyomma variegatum infestation is a cause of acute dermatitis in Nigerian chickens.
- Histopathological findings confirm a severe inflammatory response to the parasitic larvae.
- Management strategies for free-range poultry should consider tick control measures to prevent such infestations.
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