Living reference work entry
Greek: neos = new; sporos = seed; Latin: canis = dog.
Species of Coccidia (phylum Apicomplexa = Alveolata).
This species which might be identical with the originally described species Hammondia heydorni runs its life cycle in dogs and coyotes, which excrete spherical, about 10 μm-sized oocysts (Fig. 1), which form outside of the body two sporocysts each with four sporozoites. Infections of many vertebrate hosts besides cattle lead to the formation of tachyzoites (Fig. 2) and later to a low number of tissue-cysts of the thin-walled Toxoplasma type. Tachyzoites and tissue-cysts are infectious for dogs, which, however, excrete extremely low numbers of oocysts. Malformations or death of puppies of dogs or abortions of fetal calves are said to occur due to infections with Neospora, since, e.g., cattle has a wide distribution of high degrees of antibody titers (Figs. 3 and 4).
KeywordsLife Cycle Antibody Titer Fecal Sample Microscopical Analysis Wide Distribution
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