A mild form of strangles caused by an atypical Streptococcus equi.
A mild form of strangles caused by an atypical Streptococcus equi was recognized on a large horse breeding farm. The organism differed from most S equi isolates by disappearance of the mucoid capsule by 24 hours of culture, leaving a matt-type colony. Typically, the clinical signs were a transient (24-48 hour) fever, profuse nasal discharge, and anorexia. In about half the affected animals, there was moderate mandibular lymph node enlargement, and these glands usually ruptured or were drained. The use of a passive hemagglutination antibody test showed that subclinical infection was widespread in horses on the farm.
D000818:Animals; D000855:Anorexia / Q000209:etiology / Q000662:veterinary; D005334:Fever / Q000209:etiology; D006734:Horse Diseases / Q000382:microbiology*; D006736:Horses; D008199:Lymphadenitis / Q000662:veterinary*; D009297:Nasal Mucosa / Q000378:metabolism; D013290:Streptococcal Infections / Q000382:microbiology / Q000662:veterinary