Protozoan Parasitic Infection

Résumé fourni par la source

Poultry has protozoa that are classified into multiple taxonomic groupings. In poultry, two types of parasites are significant: the coccidia and the mastiogophora (flagellates). Some parasites, which cause coccidiosis, have short, direct life cycles and are therefore preferred, while other parasites that involve intermediate hosts typically do not pose a threat to commercial poultry. A significant exception is blackhead disease (histomoniasis), which has a complex life cycle involving intermediate hosts, but relies on chickens as reservoir hosts and spreads easily among turkeys within a flock. Most coccidia found in poultry belong to the genus Eimeria, however, there are also some species of Isospora and Cryptosporidium. The most well-known are the Eimeria, of which seven significant species have been identified in chickens and several more in turkeys. Anywhere chickens are raised, whether in huge commercial operations or tiny backyard flocks, parasites are an issue that can result in severe financial losses. This chapter will provide a quick overview of the main poultry protozoan parasitic species, along with some pathophysiology.

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