title: Serogrouping of Bacteroides nodosus isolates from 62 sources in the United States.
abstract: Bacteroides nodosus isolates from 62 sources in the United States were obtained from sheep with infectious foot diseases. Serotypic analysis of these isolates revealed 21 serotypes (designated I-XXI). These serotypes were compared with British and Australian/New Zealand B nodosus strains by use of reciprocal tube agglutination tests. These tests, as well as the cross-matching tube agglutination tests of the US serotypes, resulted in arranging the US serotypes into 11 serogroups, and comparing these serogroups with their Australian/New Zealand serogroup and British serotype counterparts. Three US serogroups and 1 additional British serotype had little or no relationship to any of the Australian/New Zealand serogroups A-H (the vaccine strains). One or more of these unrelated serogroups were found in 29% of the sources studied. The most frequently found US serotype was serotype XV at 29%. The most frequently found US serogroups were the serogroups analogous to serogroup B (43.5%) and serogroup H (37%); the other serogroups were found in 22.6% or less of the sources studied. Evaluation of 3 sources revealed that multiple serotypes in a single flock are common, multiple serotypes from a single lesion are possible, B nodosus isolates obtained from goats (unlike those from cattle) appear identical to the isolates obtained from sheep, and disease can appear in vaccinated animals, even in a flock that appears to be harboring only a single serogroup-B serotype (the serogroup for which there are 3 strains in the current vaccine).
authors.affiliation: College of Veterinary Medicine, Oregon State University, Corvallis 97331-4802.
authors.forename: J L
authors.initials: JL
authors.lastname: Gradin
authors.forename: A E
authors.initials: AE
authors.lastname: Sonn
authors.forename: L
authors.initials: L
authors.lastname: Petrovska
mesh_terms: D000372:Agglutination Tests; D000818:Animals; D001315:Australia; D001428:Bacterial Vaccines; D001439:Bacteroides / Q000145:classification* / Q000302:isolation & purification*; D001442:Bacteroides Infections / Q000382:microbiology / Q000662:veterinary*; D009520:New Zealand; D009922:Oregon; D012703:Serotyping / Q000662:veterinary; D012756:Sheep / Q000382:microbiology*; D012757:Sheep Diseases; D006113:United Kingdom; D014481:United States
chemical_list: D001428:Bacterial Vaccines