当前位置： SCI文献检索 > INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY期刊下所有文献 > Restoring the selectivity of modified charcoal cefoperazone deoxycholate agar for the isolation of Campylobacter species using tazobactam, a β-lactamase inhibitor.

Restoring the selectivity of modified charcoal cefoperazone deoxycholate agar for the isolation of Campylobacter species using tazobactam, a β-lactamase inhibitor.

Abstract：

:Extended spectrum β-lactamase (ESBL) producing Escherichia coli have emerged as a contaminant on modified charcoal cefoperazone deoxycholate agar (mCCDA) when attempting to selectively isolate Campylobacter spp. from poultry. E. coli are particularly problematic given their ability to grow under microaerophilic conditions and have been shown to outcompete Campylobacter species making Campylobacter detection or enumeration difficult. This paper recommends a novel method for restoring the selectivity of mCCDA using tazobactam, a β-lactamase inhibitor. The method significantly inhibited ESBL E. coli growth in spiked or naturally contaminated broiler caecal samples (p≤0.01) when compared to conventional mCCDA. This effect was seen at concentrations as low as 1mg/L tazobactam. TmCCDA(1) was found to inhibit up to 8 log10 CFU/mL of ESBL E. coli in mixed pure cultures and 7.5 log10 CFU/mL in caecal samples. Furthermore TmCCDA concentrations up to 10 mg/L had no statistically significant inhibitory effect (p≥0.05) on the recovery of a panel of 27 Campylobacter jejuni and 5 Campylobacter coli isolates when compared to conventional mCCDA. From this study it is suggested that tazobactam, which is more chemically stable than clavulanic acid or sulbactam, is more suitable for restoring the selectivity of mCCDA for the detection or isolation of campylobacters.

journal_name

Int J Food Microbiol

journal_title

International journal of food microbiology

authors

Smith S,Meade J,McGill K,Gibbons J,Bolton D,Whyte P

doi

10.1016/j.ijfoodmicro.2015.06.014

subject

Has Abstract

pub_date

2015-10-01 00:00:00

pages

131-5

eissn

0168-1605

issn

1879-3460

pii

S0168-1605(15)30038-6

journal_volume

210

pub_type

杂志文章

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