Serogrouping of Bacteroides nodosus isolates from 62 sources in the United States

• Published in: American journal of veterinary research Vol. 54; no. 7; p. 1069
• Main Authors: Gradin, J.L, Sonn, A.E, Petrovska, L
• Format: Journal Article
• Language: English
• Published: United States 01.07.1993
• Subjects: Agglutination Tests; Animals; Australia; Bacterial Vaccines; BACTEROIDES; Bacteroides - classification; Bacteroides - isolation & purification; Bacteroides Infections - microbiology; Bacteroides Infections - veterinary; CLASIFICACION; CLASSIFICATION; ESTADOS UNIDOS DE AMERICA; ETATS UNIS; HATOS; LESION; LESIONES; New Zealand; Oregon; OVIN; OVINOS; SEROTIPOS; SEROTYPE; Serotyping - veterinary; Sheep - microbiology; Sheep Diseases; TROUPEAU; United Kingdom; United States; VACCINATION; VACUNACION
• DOI: 10.2460/ajvr.1993.54.07.1069
• ISSN: 0002-9645

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 serorype 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)