The life history and development ofToxascaris leonina(von Linstow 1902) in the dog and cat

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Abstract
1. The nomenclature and host specificity ofToxascaris leoninais reviewed and the conclusion reached that this parasite occurs in a wide range of feline and canine hosts. Notice is given of application to the International Commission on Zoological Nomenclature, for the suppression ofAscaris leptopteraRudolphi 1809 andA. micropteraRudolphi, 1819, which appear to be senior synonyms ofToxascaris leonina. The synonyms and hosts ofT. leoninaare tabulated.2. The distribution and growth of the larvae ofT. leoninain experimentally infected mice, cats, and dogs is reported. A feline and a canine strain were used for these infections and infection of cats and dogs was produced both by feeding the eggs containing second-stage larvae and by feeding mouse tissues containing third-stage larvae.
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