Hammondia pardalis sp. n. (Sarcocystidae) from the Ocelot, Felis pardalis, and Experimental Infection of Other Felines |
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Authors: | LARRY D. HENDRICKS JOHN V. ERNST CHARLES H. COURTNEY CLARENCE A. SPEER |
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Affiliation: | U.S. Army Medical Research Unit Panama, Walter Reed Army Institute of Research, Box 1809, APO New York 09826;Regional Parasite Research Laboratory, USDA-ARS-SR, P.O. Drawer 952, Auburn, Alabama 36830;Department of Microbiology, University of Montana, Missoula, Montana 59801 |
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Abstract: | Synopsis. Hammondia pardals sp. n. (Eimeriorina: Sarcocystidae) from Panama Canal Zone is described as an obligate heteroxenous coccidian, with felids as the final host and laboratory mice as the experimental intermediate host. Ovoid oocysts. measuring 40.8 (36–46) × 28.5 (25–35) m. are shed unsporulated. Oocysts were infective only for the intermediate host. the laboratory mouse, Mus musculus , and the intracellular cysts were infective only for felids. Attempted passage of tissue cysts from mouse to mouse was unsuccessful. Mice fed 5 × 104 sporulated oocysts were found to harbor small intracellular cysts, 13–16 × 10–15 m, in the mesenteric lymph nodes, lungs, and intestinal submucosa 15 days postinfection. The meronts in these early cysts were stubby and measured 3 × 6 m. The prepatent period in the felids was 5 to 8 days and the patent period 5–13 days. Experimental infections of definitive hosts were successful with 6/6 domestic laboratory-reared kittens, Felis catus ; 5/5 ocelots, F. pardalis ; and 1/1 jaguarundi, F. yagouaroundi. None of the exposed raccoons, Procyon lotor , shed oocysts. |
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Keywords: | Index Key Words: Hammondia pardalis ocelot (Felis pardalis) felids laboratory mouse: Panama Canal Zone. |
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