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Characterization and horizontal transfer of class 1 integrons in Salmonella strains isolated from food products of animal origin.

Abstract：

:A total of 81 Salmonella isolates from retail meats and seafood in Hebei province, China, were assayed for the presence of and horizontal transfer of class 1 integrons. By the PCR screening for the integrons, class 1 integron was detected from strains in serotypes of Derby, Indiana, London and Choleraesuis, which were isolated from pork, chicken or seafood; however, two isolates contained the empty integron that lacked the resistance cassette, a potential hotspot for development of the multidrug resistance. In contrast, two other isolates had the antibiotic resistance gene cassettes within the class 1 integron, which were dfrA1-aadA1 and aadB-cmlA, respectively. The conjugation experiments demonstrated the plasmid-mediated transfer of the class 1 integrons. Furthermore, each of the integrons was transmitted to Streptococcus mutans via natural gene transformation. These findings suggest the possible transfer of class 1 integrons from foodborne pathogens to human residential bacteria via horizontal gene transfer.

journal_name

Int J Food Microbiol

journal_title

International journal of food microbiology

authors

Meng H,Zhang Z,Chen M,Su Y,Li L,Miyoshi S,Yan H,Shi L

doi

10.1016/j.ijfoodmicro.2011.07.006

subject

Has Abstract

pub_date

2011-10-03 00:00:00

pages

274-7

issue

3

eissn

0168-1605

issn

1879-3460

pii

S0168-1605(11)00380-1

journal_volume

149

pub_type

杂志文章

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