title: Caryospora uptoni and Frenkelia sp.-like coccidial infections in red-tailed hawks (Buteo borealis).
abstract: The feces from 16 red-tailed hawks (Buteo borealis) were examined by fecal flotation for the presence of coccidial oocysts or sporocysts. Oocysts of Caryospora uptoni were found in five (31%), sporocysts of a Frenkelia sp.-like coccidium were found in eight (50%), and mixed infections with both species of coccidia were found in three (19%) red-tailed hawks. Neither oocysts nor sporocysts were found in six (38%) red-tailed hawks. Sexual stages of C. uptoni were found in the duodenum and jejunum of a naturally infected red-tailed hawk. Sexual stages were located in enterocytes on the distal three-fourths of the villi. This study shows that over 60% of red-tailed hawks may be passing coccidial oocysts/sporocysts in their feces and provides morphological information for diagnosing C. uptoni infections in histological sections.
authors.affiliation: Department of Pathobiology, College of Veterinary Medicine, Auburn University, Alabama 36849.
authors.forename: D S
authors.initials: DS
authors.lastname: Lindsay
authors.forename: B L
authors.initials: BL
authors.lastname: Blagburn
mesh_terms: D000818:Animals; D016782:Apicomplexa / Q000254:growth & development / Q000302:isolation & purification; D001715:Bird Diseases / Q000469:parasitology*; D001717:Birds / Q000469:parasitology; D005243:Feces / Q000469:parasitology; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000662:veterinary*; D011529:Protozoan Infections, Animal