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INFECTIVITY FOR CATTLE OF ANAPLASMA MARGINALE EXTRACTED FROM BOOPHILUS MICROPLUS TICKS EXPOSED TO CERTAIN TEMPERATURES
Author(s) -
DALGLIESH R. J.,
STEWART N. P.
Publication year - 1982
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.1982.tb00574.x
Subject(s) - nymph , infectivity , biology , veterinary medicine , larva , inoculation , virology , strain (injury) , anaplasmosis , microbiology and biotechnology , tick , zoology , immunology , botany , anatomy , medicine , virus
SUMMARY:Boophilus microplus ticks collected from calves with patent Anaplasma marginale infections were incubated at either 4 to 5°C, 14°C, 22°C, 27°C or 37°C for up to 14 days. Extracts prepared either from larvae, nymphs, immature females, adult males or mixtures of both sexes were infective for 14 of the 16 splenectomised calves inoculated. Extracts either from nymphs or from adult ticks deriving from nymphs moulted in vitro were infective for 11 of 12 nonsplenectomised calves. Possible application of the findings to producing a vaccine strain of A. marginale is discussed.