식품접촉물질에 부착된 Listeria monocytogenes의 증식 및 제거에 관한 연구

• 영문명: Studies on Growth and Decontamination of Listeria Monocytogenes Attached to Food Contact Surface Materials
• 발행기관: 한국환경보건학회
• 저자명: 윤정희 고영림 나승식 이용욱
• 간행물 정보: 『한국환경보건학회지』제27권 제1호, 75~82쪽, 전체 8쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 2001.03.30

영문 초록

Microorganisms can attach firmly to food contact surface material and the resitance of adherent bacteria differ markedly from planktonic cells. Therefore, adherent cells are a potential contamination problem to the food preparation because of their high resistance. to sanitation and heat treatment. This study was carried out in order to investigate growth and decontamination of Listeria monocytogenes attached to stainless steel, glass and plastic. Listeria monocytogenes cells could attach to all types of surface at three temperatures after contact times for 24 hrs. The numbers of adherent cells were greater at higher temperatures, but not increased with incubation time. When recovery of adherent cells was investigated, after 24 grs, the numbers of adherent cells were about 10^7 ,10^10,11^11 at 4℃, 25℃, 30℃ repectively. Planctonic cells decreased by 2 log cycles after exposure to the domestic sanitizer. Adherent cells showed high resistance to domestic sanitizers and that was dependent upon surface materials studied, being greatest on plastic followed by stainless steel and glass. Adherent cells were more resistant to heat treatment than planktonic cells. When adherent cells were exposed to the temperature of 50℃, 55℃, 57.5℃ for 10 min, their populations did not decrease significantly. When the temprature increased to 60℃, cells attached to all types of surfaces were completely inactivated for 10 min.

키워드

Listeria monocytogenes Adherent cell Stainless steel Plastic Glass Domestic sanitizer Heat treatment