An attempt to identify the evolutionary origin of a novel serotype of Salmonella enterica isolated from harbour porpoises.
The isolation since 1991 of a new serotype of Salmonella enterica (antigenic formula 4,12:a:-) from harbour porpoises (Phocoena phocoena) at post-mortem examination raised the question of its evolutionary origin. Representative strains of S. enterica serotype 4,12:a:- and strains of eight other serotypes of serogroup 04 with phase-1 flagellar antigen H 'a' were examined by EcoRI ribotyping, IS200 fingerprinting and PCR-based profiling. Statistical analysis of results of multiple typing showed that strains of Salmonella serotype 4,12:a:- were genetically distant from those of antigenically similar salmonella serotypes, none of which seemed likely to be the progenitor of the 'porpoise' serotype.
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Crichton
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Taylor
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Mather
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Medical Microbiology, Ninewells Hospital and Medical School, Dundee DD1 9SY and *Scottish Salmonella Reference Laboratory, Stobhill Hospital, Glasgow G21 3UW.
D000818:Animals; D016172:DNA Fingerprinting; D015342:DNA Probes; D004269:DNA, Bacterial / Q000235:genetics; D019143:Evolution, Molecular; D010802:Phylogeny; D019576:Porpoises / Q000382:microbiology*; D012335:RNA, Ribosomal / Q000235:genetics; D019779:Salmonella enterica / Q000145:classification / Q000235:genetics*; D012703:Serotyping
D015342:DNA Probes; D004269:DNA, Bacterial; D012335:RNA, Ribosomal