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ABSTRACTEight isolates of Desulfovibriospp. have been obtained over 5 years from abdominal or brain abscesses or blood. In seven patients these strains were part of a mixed flora. One strain was isolated in pure culture from the blood of a patient with peritonitis of appendicular origin. According to the 16S rRNA gene sequences, this strain was close to Desulfovibrio fairfieldensis. The present report describes the fourth isolate of this recently described species to be isolated in pure culture or as a predominant part of the flora and to be associated with infectious processes. Thus, D. fairfieldensismay possess a higher pathogenic potential than other Desulfovibriospecies.

ABSTRACTFifty-six Pasteurella multocidastrains (40 P. multocidasubsp. septicaand 16 P. multocidasubsp. multocidastrains) isolated from the mouths of 56 dogs among the 134 living in a French canine military training center (132e Groupe Cynophile de l’Arme´e de Terre, Suippes, France) were studied by use of enterobacterial repetitive intergenic consensus-PCR (ERIC-PCR) and restriction fragment length polymorphism (RFLP) techniques. Both techniques showed genomic heterogeneity of the strains studied. However, RFLP was more discriminatory than ERIC-PCR for differentiating P. multocidastrains. All but three pairs of strains were discriminated by RFLP, suggesting a limited circulation of strains between these dogs living in proximity. Although ERIC-PCR is easier and faster to perform, it cannot be recommended for epidemiological studies of P. multocidastrains.