GENETIC-BASIS OF TETRACYCLINE RESISTANCE IN CLINICAL ISOLATES OF LISTERIA-MONOCYTOGENES

被引:86
|
作者
POYARTSALMERON, C
TRIEUCUOT, P
CARLIER, C
MACGOWAN, A
MCLAUCHLIN, J
COURVALIN, P
机构
[1] CENT PUBL HLTH LAB,DIV MICROBIOL REAGENTS & QUAL CONTROL,LONDON NW9 5HT,ENGLAND
[2] BRISTOL ROYAL INFIRM & GEN HOSP,BRISTOL BS2 8HW,AVON,ENGLAND
关键词
D O I
10.1128/AAC.36.2.463
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The genetic basis of tetracycline resistance was studied in 25 clinical isolates of Listeria monocytogenes. Resistance to tetracycline was associated with resistance to minocycline and due to the presence of the tet(M) gene in 24 strains. Association of tet(M) with int-Tn, the gene encoding the protein required for the movements of Tn1545-like conjugative transposons, was found in all strains. Cotransfer of tet(M) and int-Tn among L. monocytogenes cells and from L. monocytogenes to Enterococcus faecalis was detected in 7 of the 12 strains studied at frequencies similar to those obtained with the prototype element Tn1545. tet(L), the secondmost prevalent tetracycline resistance gene in enterococci and streptococci, was detected in the remaining strain, where it was borne by a 5-kb plasmid. These observations indicate that two types of movable genetic elements, transposons and plasmids, in enterococci and streptococci are responsible for emergence of drug resistance in L. monocytogenes.
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页码:463 / 466
页数:4
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