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Coccidiosis associated with post‐weaning diarrhoea in beef calves in a dry tropical region
Author(s) -
PARKER R. J.,
BOOTHBY K.,
POLKINGHORNE I.,
HOLROYD R. G.
Publication year - 1984
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.1751-0813.1984.tb07236.x
Subject(s) - eimeria , coccidia , coccidiosis , weaning , veterinary medicine , biology , zoology , anthelmintic , helminths , tropics , parasite hosting , immunology , medicine , ecology , world wide web , computer science
SUMMARY The roles of helminths and coccidia in post‐weaning diarrhoea in beef calves in the dry tropics were investigated. Diarrhoea occurred approximately one month after weaning in both anthelmintic treated and untreated calves. The highest numbers of coccidial oocysts were seen 29 days after weaning and 3 necropsies confirmed Eimeria zuernii coccidiosis. In the absence of wet overcrowded conditions, disease may have been precipitated by environmental interactions leading to suppression of host immunity. Other Eimeria identified were E. bukidnonensis, E. wyomingensis, E. bovis, E. auburnensis, E. cylindrica, E. ellipsoidalis and E. subspherica. The last 5 species are believed not to have been previously documented in Australia. The presence of E. canadensis was strongly suspected.