title: Isolation of Arcanobacterium hippocoleae from a case of placentitis and stillbirth in a mare.
abstract: Based on the scarcity of reports in veterinary medicine literature, it appears that Arcanobacterium spp. are rarely isolated from horses. Recently, a single isolate from vaginal discharge in a mare was characterized as a new species, Arcanobacterium hippocoleae. The present report describes a case of necrosuppurative placentitis and stillbirth in an American Quarterhorse mare. Numerous colonies of irregular, Gram-positive, rod-shaped bacteria were observed by histological examination within fibrin lattice associated with placental lesions. Arcanobacterium hippocoleae was isolated in large numbers from the placenta, lung, and stomach contents. To the authors' knowledge, this is the first report of placentitis associated with Arcanobacterium spp. in a horse and the third reported isolation of A. hippocoleae from a horse.
authors.affiliation: Department of Comparative Medicine, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37901-1071, USA. bemis@utk.edu
authors.forename: David A
authors.initials: DA
authors.lastname: Bemis
authors.forename: Mary Jean
authors.initials: MJ
authors.lastname: Bryant
authors.forename: Stephen A
authors.initials: SA
authors.lastname: Kania
authors.forename: Shelley J
authors.initials: SJ
authors.lastname: Newman
mesh_terms: D000192:Actinomycetales / Q000235:genetics / Q000302:isolation & purification*; D000193:Actinomycetales Infections / Q000473:pathology / Q000662:veterinary*; D000818:Animals; D017931:DNA Primers; D005260:Female; D006736:Horses; D010920:Placenta / Q000382:microbiology / Q000473:pathology*; D016133:Polymerase Chain Reaction; D011247:Pregnancy; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D050497:Stillbirth / Q000662:veterinary*
chemical_list: D017931:DNA Primers; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S