Pb. Crichton et al., DISTRIBUTION OF INSERTION-SEQUENCE IS200 AMONG DIFFERENT CLONAL LINESOF THE RELATED SALMONELLA SEROTYPES LIVINGSTONE AND EIMSBUETTEL, Journal of Medical Microbiology, 47(9), 1998, pp. 791-797
The copy number and genetic location of IS200 have provided evidence o
f strain relatedness in many serotypes of Salmonella. In this study, 1
00 isolates of the related serotypes Livingstone (6,7:d:l,w) and Eimsb
uettel (6,7,<(14)under bar>:d:l,w), representing 10 ribotype/biotype (
RT/BT) groups isolated from human and non-human sources in seven count
ries over a 26-year period, were examined for their IS200 profiles. Th
e distribution of IS200 in strains of these serotypes was limited, bei
ng present in all 53 isolates of ribotype 1 (RT1) and its variant type
RT6, in one of five isolates of RT5 but in none of 42 isolates of RTs
2, 3 or 4, Although the seven IS200 profiles identified in RT1 isolat
es were of little value for further discrimination within different bi
otype groups, they were extremely valuable for confirming serotype: is
olates of RT1/BT8/IS200 profile A (or its variants) and those of RT1/B
T3/IS200 profile B (or its variants) were almost invariably associated
with serotypes Livingstone and Eimsbuettel, respectively.