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1 April 1984 ENDOGENOUS DEVELOPMENT AND PATHOGENICITY OF EIMERIA ANGUSTA IN THE RUFFED GROUSE, BONASA UMBELLUS
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Abstract

Oocysts of Eimeria angusta were recovered from the cecum of a captive ruffed grouse which died of coccidial typhlitis. Five experimental passages were made in grouse over a 2-yr period. Prepatent period was 6.5–7.0 days; sporulation time at 22 C was 54–60 hr. Endogenous stages were not found in grouse killed 1 and 2 days after inoculation (DAI). A few immature schizonts were in cecal epithelium 4 DAI. Developing and mature schizonts, and undifferentiated gamonts were in cecal epithelium 5 DAI. Developing micro- and macrogamonts, but no oocysts, were present 6.5 DAI. Fibrinohemorrhagic typhlitis, associated with large numbers of gamonts and oocysts in the epithelium, was found 9 DAI. Cecal glands were hypertrophic and there was a heavy mixed inflammatory cell reaction. Diarrhea, depression and reduced feed intake occurred 7–10 DAI with most severe signs and greatest oocyst passage 8 or 9 DAI. Most infected birds lost weight 5–8 or 9 DAI, but none died.

Barker, Garbutt, and Middleton: ENDOGENOUS DEVELOPMENT AND PATHOGENICITY OF EIMERIA ANGUSTA IN THE RUFFED GROUSE, BONASA UMBELLUS
Ian K. Barker, Allan Garbutt, and Alex L. Middleton "ENDOGENOUS DEVELOPMENT AND PATHOGENICITY OF EIMERIA ANGUSTA IN THE RUFFED GROUSE, BONASA UMBELLUS," Journal of Wildlife Diseases 20(2), (1 April 1984). https://doi.org/10.7589/0090-3558-20.2.100
Received: 27 June 1983; Published: 1 April 1984
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