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MEMBRANE LIFTING TECHNIQUE FOR RAPID DETECTION OF ESCHERICHIACOLI0157:H7 IN INOCULATED GROUND MEATS

 

作者: HSIU‐CHUAN SONIA TSAI,   MICHAEL F. SLAVIK,  

 

期刊: Journal of Rapid Methods&Automation in Microbiology  (WILEY Available online 1996)
卷期: Volume 4, issue 3  

页码: 165-172

 

ISSN:1060-3999

 

年代: 1996

 

DOI:10.1111/j.1745-4581.1996.tb00120.x

 

出版商: Blackwell Publishing Ltd

 

数据来源: WILEY

 

摘要:

A membrane lifting technique was developed for direct rapid detection of Escherichia coli 0157:H7 in inoculated ground meats. Duplicate groups of 2 meatballs were inoculated with volumes of 0.1‐ml of a serial dilution (1:10) of E. coli 0157:H7 or a mixed culture containing one strain of E. coli 0157:H7 and a non‐0157:H7E. coli serotype (E. coli ATCC 25922). Each meatball was sampled by sandwiching with 2 pieces of nitrocellulose membranes and pressing against each other to the center of the meatball. The membranes were in contact with the meats for 10 min to lift the bacteria. The membranes were removed and incubated on MacConkey‐sorbitol agar plates with the meat contact side up. After 18 h incubation at 37C, an immunostain was performed directly on the membranes for detection of the presence or absence of E. coli 0157:H7. This method was found to be sensitive enough to detect as few as 1 to 2 cells of E. coli 0157:H7 inoculated on surfaces of 18‐g meatballs. This method might be used as a rapid presumptive test for E. coli

 

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