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The Veterinary Record, Vol 124, Issue 22, 583-584
Copyright © 1989 by British Veterinary Association

Papers & Articles

Delayed-type hypersensitivity test for assessing tick-immune status of cattle in Zambia

RE Smith, ET Mwase, A Heller-Haupt, PK Trinder, RG Pegram, AJ Wilsmore, and MG Varma

Royal Veterinary College, London.

Delayed-type hypersensitivity skin reactions were used to assess the tick resistance status of Tonga calves in Zambia. The antigen used in the tests was a homogenate of unfed nymphal Rhipicephalus appendiculatus which had been shown to give protective immunity in guinea pigs to adult female R appendiculatus. There was a significant negative correlation between the intensity of the reactions and the total number of ticks (Amblyomma variegatum, R appendiculatus, Hyalomma truncatum, Boophilus decoloratus and Rhipicephalus species) on the animals.




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Copyright © 1989 British Veterinary Association