Rapid and automated detection of salmonella by electrical measurements

Easter, M.C.; Gibson, D. M.

doi:10.1017/s0022172400061477

Cited by 76 publications

(34 citation statements)

References 10 publications

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“…Numerous papers have been published on the subject of media engineering for Salmonella detection with emphasis on the optimization of the electrical signal and the support of selective growth of Salmonella. The initial impedance detection medium for Salmonella was selenite-cystine/trimethylamine oxide/dulcitol (Easter and Gibson, 1985). Due to negative results for some Salmonella strains, dulcitol in the medium was replaced by mannitol (Gibson, 1987;Ogden and Cann, 1987).…”

Section: Classic Impedance Microbiologymentioning

confidence: 99%

Food‐borne Pathogenic Bacteria

Shi

Xie

Zhou

2017

Food Safety in China

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The realization of rapid, sensitive, and specific methods to detect foodborne pathogenic bacteria is central to implementing effective practice to ensure food safety and security. As a principle of transduction, the impedance technique has been applied in the field of microbiology as a means to detect and/or quantify foodborne pathogenic bacteria. The integration of impedance with biological recognition technology for detection of bacteria has led to the development of impedance biosensors that are finding wide-spread use in the recent years. This paper reviews the progress and applications of impedance microbiology for foodborne pathogenic bacteria detection, particularly the new aspects that have been added to this subject in the past few years, including the use of interdigitated microelectrodes, the development of chip-based impedance microbiology, and the use of equivalent circuits for analysis of the impedance systems. This paper also reviews the significant developments of impedance biosensors for bacteria detection in the past 5 years, focusing on microfabricated microelectrodes-based and microfluidic-based Faradaic electrochemical impedance biosensors, non-Faradaic impedance biosensors, and the integration of impedance biosensors with other techniques such as dielectrophoresis and electropermeabilization. Published by Elsevier Inc.

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Section: Classic Impedance Microbiologymentioning

confidence: 99%

Food‐borne Pathogenic Bacteria

Shi

Xie

Zhou

2017

Food Safety in China

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“…It has been reported that 927 outbreaks of foodborne disease (36,479 cases) took place in Japan in 1989.1} Of these, 146 outbreaks (6,750 cases) were caused by Salmonella.Ĉ onventional Salmonella detection from foods requires a minimumof 4 days after sample receipt to obtain presumptive results. Rapid detection of Salmonella in foods is important for quality assurance in the food industry.…”

Section: Foodborne Illnessmentioning

confidence: 99%

Purification and Some Properties of a Novel Ethanol Dehydrogenase with High Activity against Dulcitol 1-Phosphate from Salmonella Typhimurium IFO 12529.

Miyamoto

Yonemura

Yoshimoto

et al. 1991

Agricultural and Biological Chemistry

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A novel ethanol dehydrogenase with high activity against dulcitol 1-phosphate (D1P-EDH) was purified from Salmonella typhimurium IFO 12529 grown in a medium containing dulcitol as a carbon source. D1P-EDH was purified from a crude extract of S. typhimurium cells by (NH4)2SO4 precipitation and columnchromatographies on Blue-Cellulofine, Sephacryl S-300, and Zorbax GF-250. D1P-EDHwas purified 277-fold with an activity yield of 21.3%. The purified preparation gave a single band on an electrophoregram. The activity staining of the electrophoregram of the (NH4)2SO4 precipitate indicated that there was no isozyme of D1P-EDHin the extract. The molecular weight of D1P-EDHwas estimated to be 158,000 by gel filtration and 40,000 by SDS-polyacrylamide gel electrophoresis.D1P-EDHshowed its maximal activity in a pH range from 9.0 to 9.5. D1P-EDHwas stable in a pH range from 6.0 to 10.0 and was also stable at 30°C for 120min. The purified preparation oxidized fructose 6-phosphate and galactose 6-phosphate to the same extent as DIP and oxidized much more ethanol than DIP. D1P-EDHactivity was strongly inhibited by /7-chloromercuribenzoic acid and NaN3though it was activated by Al3+, Ba2+, Ca2 +, andFe2+.

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“…These include electrical methods (Easter and Gibson 1985), immunoassays (e.g. Jones et al 1995), immunomagnetic separation (e.g.…”

Section: Introductionmentioning

confidence: 99%

Use of pyrrolidonyl peptidase to distinguishCitrobacterfromSalmonella

Bennett

MacPhee

Betts

et al. 1999

Letters in Applied Microbiology

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In the routine testing of foods for Salmonella, Citrobacter and other members of the Enterobacteriaceae often produce colonies which are almost indistinguishable from Salmonella on commonly used selective agars. Biochemical confirmation of such colonies can be expensive and time‐consuming. It has been suggested that the enzyme pyrrolidonyl peptidase (PYRase) could be used as a rapid test to distinguish Citrobacter colonies (PYRase‐positive) from Salmonella (PYRase‐negative). Pure cultures of Salmonella, Citrobacter and other Enterobacteriaceae were tested for PYRase activity; all strains of Salmonella tested were PYRase‐negative, and all Citrobacter tested were PYRase‐positive. Inoculated and naturally contaminated food samples were tested for the presence of Salmonella by a standard cultural method. A PYR test was used to test Salmonella‐like colonies isolated on selective agar and potentially, eliminate PYR‐positive isolates from further biochemical testing. The test was able to screen out 6% of colonies selected from samples inoculated with Salmonella, and 43% of colonies selected from uninoculated samples.

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Rapid and automated detection of salmonella by electrical measurements

Cited by 76 publications

References 10 publications

Food‐borne Pathogenic Bacteria

Food‐borne Pathogenic Bacteria

Purification and Some Properties of a Novel Ethanol Dehydrogenase with High Activity against Dulcitol 1-Phosphate from Salmonella Typhimurium IFO 12529.

Use of pyrrolidonyl peptidase to distinguishCitrobacterfromSalmonella

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