Prevention of Salmonella cross-contamination in an oilmeal manufacturing plant.
OBJECTIVE
The mechanisms of Salmonella contamination in an oilmeal plant were investigated and the basic data were collected in order to achieve control of Salmonella in oilmeal.


RESULTS
Salmonella was detected in all contamination vectors and environmental factors investigated, namely: operators, processing floor, dust in the air and rodents. In particular, high concentrations of Salmonella were detected on the processing floor of the manufacturing area, which has high oil content. Steam was the most effective disinfection method used for the processing floor, as the effects of heat sterilization and disinfection may work in tandem. In addition, restricting the movement of operators of the production chain remarkably reduced Salmonella contamination, even in areas of otherwise high contamination.


CONCLUSIONS
Within the oilmeal plant, high Salmonella contamination rates for the processing floor represent the greatest risk of contamination of oilmeal via operators, dust in the air and rodents. Therefore, control of the processing floor is the most important means for reducing the oilmeal contamination rate.


CONCLUSIONS
Specific Salmonella control methods for oilmeal plants have been established.
Morita
T
T
Yokohama Isogo Plant, The Nisshin OilliO Group, Ltd., Isogo-ku, Yokohama, Japan. t-morita@nisshin-oillio.com
Kitazawa
H
H
Iida
T
T
Kamata
S
S
D000821:Animal Feed; D000818:Animals; D004197:Disease Reservoirs; D004199:Disease Vectors; D004203:Disinfection; D004391:Dust; D004531:Eggs; D016521:Electrophoresis, Gel, Pulsed-Field; D005525:Food-Processing Industry / Q000458:organization & administration; D006358:Hot Temperature; D006801:Humans; D016272:Occupational Health; D009821:Oils; D011200:Poultry; D011201:Poultry Diseases / Q000517:prevention & control* / Q000635:transmission; D051381:Rats; D012478:Salmonella Food Poisoning / Q000517:prevention & control* / Q000635:transmission; D012481:Salmonella Infections, Animal / Q000517:prevention & control* / Q000635:transmission; D012477:Salmonella enteritidis / Q000302:isolation & purification; D012703:Serotyping; D014867:Water
D004391:Dust; D009821:Oils; D014867:Water