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[Preliminary results of the determination of plasmid profiles of veterinary Salmonella isolates].

A plasmid of 60 Md magnitude was recorded from 40 in 41 Salmonella (S.) typhimurium strains, including the Copenhagen minus variant. A plasmid of that kind had been described in the international literature as serovar-specific of S. typhimurium. One S. typhimurium strain was without plasmid. Five contained the 60-Md and other plasmids. No relationship was found to exist between the 60-Md plasmid and biovar as well as chemotherapeutic resistance. Further studies will be necessary for consistent information on virulence association of this plasmid and its serovar specificity. Plasmid profiles were also checked in four S. enteritidis strain and additional serovars.