Colifast as

Grete Lorentzen

James D Berg

Olaug Taran Skjerdal

A rapid method for detecting spoilage of a food sample, particularly a fish sample, by detecting and enumerating sulfide-producing bacteria (SPB). A growth medium containing iron and sulfur is combined with the food sample forming an incubation mixture which is incubated for a period of time. In one embodiment, a plurality of fluorescence measurements are taken during an incubation period of about 3 hours to 17 hours at 30&#xb0; C. SPB are determined to be present in the sample if the fluorescence measurement initially increases and then decreases to form a fluorescence maximum (peak). The time to detection of the fluorescence peak can be used with a correlation schedule to enumerate the SPB in the food sample. In another embodiment, a visual test can also be used to identify color changes in the incubation mixture to provide a semi-quantitative enumeration of SPB effective after about 3 hours to 17 hours of incubation.

Rapid method of detection and enumeration of sulfide-producing bacteria in food products

A rapid method for detecting spoilage of a food sample, particularly a fish sample, by detecting and enumerating sulfide-producing bacteria (SPB). A growth medium containing iron and sulfur is combined with the food sample forming an incubation mixture which is incubated for a period of time. A plurality of fluorescence measurements are taken during an incubation period of about 4 hours to 17 hours at 30&deg; C. SPB are determined to be present in the sample if the fluorescence measurement initially increases and then decreases to form a fluorescence maximum (peak). The time to detection of the fluorescence peak can be used with a correlation schedule to enumerate the SPB in the food sample. A visual test can also be used to identify color changes in the incubation mixture to provide a semi-quantitative enumeration of SPB effective in about 4 hours to 17 hours at 30&deg; C.

Growing community of inventors

Tromsø, Norway

Grete Lorentzen