title: Serotyping of Chlamydia. I. Isolates of ovine origin.
abstract: Eight chlamydial isolates of ovine origin were tested in a plaque reduction system using homologous and heterologous rooster antisera. The eight isolates could be separated into two separate immunotypes. Type 1 included isolates associated with ovine abortion and one agent recovered from the feces of an apparently normal sheep. Type 2 isolates were associated with polyarthritis and conjunctivitis. These two serotypes were not cross-reactive with several chlamydiae of avian origin. Further application of the plaque reduction test may provide a useful means of typing chlamydiae.
mesh_terms: D000818:Animals; D002645:Chickens / Q000276:immunology; D002689:Chlamydia / Q000145:classification* / Q000302:isolation & purification; D005260:Female; D007106:Immune Sera; D012703:Serotyping; D012756:Sheep; D010948:Viral Plaque Assay; D014817:Vitelline Membrane / Q000382:microbiology
chemical_list: D007106:Immune Sera