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Studies to determine the taxonomic status of Eimeria mitis, Tyzzer 1929 and E. mivati, Edgar and Seibold 1964

Published online by Cambridge University Press:  06 April 2009

M. W. Shirley
Houghton Poultry Research Station, Houghton, Huntingdon PE 17 2DA
T. K. Jeffers
Lilly Research Laboratories, Division of Eli Lilly and Company, Greenfield, Indiana 46140, USA
P. L. Long
Department of Poultry Science, University of Georgia, Athens, Georgia 30602, USA


We have examined several taxonomic features of a number of strains of Eimeria from many sources world wide. The strains were isolated on the basis of their small spherical (or sub-spherical) oocysts. From a study of mean oocyst dimensions, electrophoretic variation of enzymes, ability to develop in embryonated eggs, absence of gross lesions in heavily infected chickens, and cross-immunity, all the strains were found to belong to one species. For convenience, the parasites when isolated, were referred to as strains of E. mitis/mivati-type, but after characterization they were clearly found to be E. mitis. In contrast, a laboratory strain of E. mivati supplied to one of us (M.W.S.) was found to be a mixture of E. acervulina and E. mitis. Evidence from these and other studies supports the notion that E. mivati is a nomina dubia.

Research Article
Copyright © Cambridge University Press 1983

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