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Age grades and infection rates of Rhipicephalus appendiculatus Neumann (Acari: Ixodidae) to assess theileriosis challenge in the field

Published online by Cambridge University Press:  10 July 2009

Alan R. Walker  and
June D. Fletcher
Alan R. Walker
Affiliation:
Centre for Tropical Veterinary Medicine, University of Edinburgh, Roslin, Midlothian, EH25 9RG, UK
June D. Fletcher
Affiliation:
Centre for Tropical Veterinary Medicine, University of Edinburgh, Roslin, Midlothian, EH25 9RG, UK
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Abstract

Data are presented from five series of 240 adults of Rhipicephalus appendiculatus Neumann kept in the laboratory, in which a steady decline in the numbers of granules in e cells of type 3 acini of the salivary glands occurred. This was readily detected in whole gland preparations of the salivary glands stained with methyl green and pyronin, and the same specimens could be used for detecting Theileria parasites in the salivary glands. Characteristics for grading these ticks into three physiological age grades are given, and a formula is provided for incorporating the age grade with infection rate. This gives a value for comparative estimates of the challenge posed by field populations of ticks for the transmission of Theileria to cattle.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 75 , Issue 4 , December 1985 , pp. 653 - 660
Copyright
Copyright © Cambridge University Press 1985

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