Study on rapid Conductance Detection of Salmonellas in Foods

Abstract

Abstract: A conductance method was proposed for the rapid detection of salmonellae in food, by adding trimethylamine- N- oxide to increase the conductance changes of the selective media Tetrathionate Broth(TTB), continuously monitored the conductance changes of the media caused by bacterial metabolism, judge the salmonellae Presence by the changes expressed as percentage decrease of the initial values.In comparing the conductance method with the standard culture method, the conductance method could result in 19 positive of 21 known samples with, recovery over 90% ; where as the standard culture method resulted only in 18 of 21, The testing result of the two methods are consistent.For negative investigation the results could be obtained within 48 h.It showed that the conductance method was very suitable as a screening method for salmonellae defection in foods and unique to its rapidess and reliablity.

Key words: , Conductance Detection Salmonellas Food；

CHEN Guang-Quan, Zhang-Hui-Yuan, Rao-Hong, Yuan-Jun. Study on rapid Conductance Detection of Salmonellas in Foods[J]. FOOD SCIENCE, 2001, 22(9): 66-70.

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Study on rapid Conductance Detection of Salmonellas in Foods

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