title: A cytotoxicity assay for Clostridium spiroforme enterotoxin in cecal fluid of rabbits.
abstract: Clostridium spiroforme enterotoxin-mediated diarrhea can be a common cause of mortality among weanling age rabbits. Definitive diagnosis of this disorder requires detection of the causative enterotoxin. Using filtered cecal supernatant from necropsy specimens, antibodies to C. spiroforme and its products and Vero cells, a cytotoxicity assay was performed on 22 rabbits with clinical signs and lesions consistent with C. spiroforme enterotoxin-mediated diarrhea. A cytotoxic effect was detected, generally within 4 h, in 18 of 22 rabbits. The cytotoxic effect was blocked by preincubation of the cecal material with antibodies to C. spiroforme and its products. Culture of cecal contents and smears of cecal contents identified C. spiroforme in 10/22 and 12/22 cases, respectively. This cytotoxicity assay provided a rapid and sensitive method for diagnosing C. spiroforme enterotoxin-mediated diarrhea.
authors.affiliation: Department of Pathology, New York State College of Veterinary Medicine, Cornell University, Ithaca 14850.
authors.forename: M T
authors.initials: MT
authors.lastname: Butt
authors.forename: R E
authors.initials: RE
authors.lastname: Papendick
authors.forename: L G
authors.initials: LG
authors.lastname: Carbone
authors.forename: F W
authors.initials: FW
authors.lastname: Quimby
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial; D001826:Body Fluids / Q000737:chemistry; D002432:Cecum / Q000737:chemistry*; D003013:Clostridium / Q000302:isolation & purification* / Q000378:metabolism; D003015:Clostridium Infections / Q000382:microbiology / Q000662:veterinary*; D003601:Cytotoxicity Tests, Immunologic; D003967:Diarrhea / Q000382:microbiology / Q000662:veterinary*; D004768:Enterotoxins / Q000032:analysis*; D011817:Rabbits; D014709:Vero Cells
chemical_list: D000907:Antibodies, Bacterial; D004768:Enterotoxins