ABSTRACT
A total of 15 isolates of Salmonella enterica serovar 4,5,12:i:- obtained from diseased cows and patients in Iwate Prefecture, Japan, were characterized to clarify the genetic basis of this serovar. S. Typhimurium- specific IS200 was detected from all the isolates. A 94-kb plasmid and the spvB gene were detected from all but one of the 15 isolates. The results of PCR mapping of the fljAB operon and its flanking regions indicate that there are deletions or mutations in this chromosomal region. These data suggest that the 15 isolates are monophasic variants of S. Typhimurium. Epidemiological relationships between the isolates obtained from cattle and humans were not suspected based on the comparison of data employing plasmid profiling and pulsed-field gel electrophoresis.
Subject(s)
Cattle Diseases/microbiology , Salmonella Infections, Animal/microbiology , Salmonella enterica/classification , Zoonoses/microbiology , ADP Ribose Transferases/chemistry , ADP Ribose Transferases/genetics , Animals , Cattle , Cattle Diseases/genetics , DNA, Bacterial/chemistry , DNA, Bacterial/genetics , Electrophoresis, Gel, Pulsed-Field/veterinary , Humans , Japan , Microbial Sensitivity Tests/veterinary , Polymerase Chain Reaction/veterinary , Polymorphism, Restriction Fragment Length , Salmonella Infections, Animal/genetics , Salmonella enterica/genetics , Virulence Factors/chemistry , Virulence Factors/geneticsABSTRACT
We attempted to isolate Listeria monocytogenes from skin, contents of large intestines and carcasses of cattle introduced to a slaughterhouse in order to identify source of contamination for this pathogen. Sixty skin samples, 60 samples of the contents of large intestines and 30 carcass samples were colleted in June, August and November 2003 for use in this study. Listeria spp. and L. monocytogenes were isolated from 30 (50%) and 3 (5%) of the cattle skin samples, respectively. However, no Listeria spp., including L. monocytogenes, were isolated from intestinal contents or carcasses. Seven isolates were obtained, of which five and two strains were serotypes 1/2a and 1/2b, respectively. Genetic analysis suggested that there was persistent inhabitation of the pathogen around the area investigated in this study.
