Effectiveness of radiation processing for elimination of Salmonella Typhimurium from minimally processed pineapple (Ananas comosus Merr.).
The microbiological quality of market samples of minimally processed (MP) pineapple was examined. The effectiveness of radiation treatment in eliminating Salmonella Typhimurium from laboratory inoculated ready-to-eat pineapple slices was also studied. Microbiological quality of minimally processed pineapple samples from Mumbai market was poor; 8.8% of the samples were positive for Salmonella. D(10) (the radiation dose required to reduce bacterial population by 90%) value for S. Typhimurium inoculated in pineapple was 0.242 kGy. Inoculated pack studies in minimally processed pineapple showed that the treatment with a 2-kGy dose of gamma radiation could eliminate 5 log CFU/g of S. Typhimurium. The pathogen was not detected from radiation-processed samples up to 12 d during storage at 4 and 10 degrees C. The processing of market samples with 1 and 2 kGy was effective in improving the microbiological quality of these products.
Shashidhar
Ravindranath
R
Food Technology Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
Dhokane
Varsha S
VS
Hajare
Sachin N
SN
Sharma
Arun
A
Bandekar
Jayant R
JR
D031230:Ananas / Q000382:microbiology* / Q000528:radiation effects; D015169:Colony Count, Microbial; D003257:Consumer Product Safety; D004307:Dose-Response Relationship, Radiation; D005506:Food Contamination / Q000517:prevention & control*; D005511:Food Handling / Q000379:methods; D005514:Food Irradiation / Q000379:methods*; D005516:Food Microbiology; D005519:Food Preservation / Q000379:methods*; D005720:Gamma Rays; D012486:Salmonella typhimurium / Q000254:growth & development / Q000528:radiation effects*; D013649:Taste; D013696:Temperature; D013997:Time Factors