Abstract
ABSTRACT Genus Eimeria is a group of obligate Protista parasites within phylum Apicomplexa that causes a major threat to animal production. Little information is available about the coccidia of pigeons. This study was undertaken to study experimental infection in domesticated pigeons, its clinical signs, and pathological interpretation due to Eimeria species. Eimeria labbeana-like oocysts were used as a model parasite for experimental infection of pigeons. Twenty pigeons were brought and examined for 7 days to ensure they were coccidia-free. Five pigeons were separated into parasite passage. The remaining pigeons were divided into a control group of five pigeons, and ten pigeons were infected with 3×104 E. labbeana-like oocysts. Infected pigeons showed ruffled feathers, greenish watery diarrhea, weakness, blood-tinged droppings, etc. Pre-patent and patent durations were five and fourteen days of oral inoculation of Eimeria. Oocysts shedding began on the 5th-day p.i. and peaked on the 8th-day p.i. There is a significant loss in body weight due to infection. Histopathological examination showed damage to intestinal mucosa with various Eimeria developmental stages in the duodenal of the small intestine. This study is considered basic information on the first detection of biology of Eimeria species infecting pigeons in Saudi Arabia.
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