• 제목/요약/키워드: food poisoning bacteria

검색결과 188건 처리시간 0.021초

보리새싹 함유 녹즙의 살균공정 한계기준 설정에 관한 연구 (Study of the Limitation Standards Setting of Sterilization Processing to Vagetable Juice Contain Barley Sprout)

  • 방인희;정미연;권상철
    • 한국산학기술학회논문지
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    • 제17권7호
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    • pp.367-373
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    • 2016
  • 본 연구는 보리새싹 함유 녹즙의 제조공정 중 자외선살균공정의 한계기준 설정을 위한 목적으로 실시하였다. 본 실험에 사용된 시료는 녹즙의 주원료인 보리새싹, 유기신선초, 당근, 유기민들레, 케일, 돌미나리, 신선초, 양배추는 2015년 12월 1일~2016년 3월 1일까지 충북 진천군 소재에 있는 CSJ 업체에서 제공받았다. 제조공정도는 일반적인 녹즙 제조업체의 제조공정을 참고로 작성하였다. 녹즙의 배합비율은 Table 1과 같이 새싹채소(다채, 콜라비, 유채, 블로콜리) 18%와 새싹보리 3%, 신선초 18%, 오렌지 농축과즙 1%, 사과농축과즙 1%, 플라토올리고당 6%, 채소 발효즙 10%, 레몬농축액 0.4%와 정제수 39.6%를 사용하였다. 본 연구에서 사용한 비가열 살균방법은 자외선 살균방법으로 1차 230W 10단, 2차 320W 8단과 3차 320W 5단으로 살균기 모터속도는 1, 2차 25Hz와 3차 40Hz속도로 살균을 실시한 이후의 미생물검사 결과 민들레의 경우 세척 후 $2.56{\times}10^8CFU/mL$에서 법적기준인 100,000 CFU/mL보다 낮은 $5.96{\times}10^3CFU/mL$로 감소하였고, Coliform 과 식중독균들은 모두 검출되지 않았다. 따라서 보리새싹을 함유한 녹즙의 자외선살균방법을 이용한 미생물학적 한계기준 설정에 기초가 될 것으로 사료된다.

Efficiency of Hurdle Technology Applied to Raw Cured Meat (Si-Raw)Processing

  • Chen, Ming-Tsao;Lin, Young-Sun;Tsai, Hung-Tsung;Kuo, Hsiu-Lan
    • Asian-Australasian Journal of Animal Sciences
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    • 제15권11호
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    • pp.1646-1652
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    • 2002
  • Si-Raw is a raw cured meat (raw, cured meat fermented with steamed rice) produced by the aboriginal people of Taiwan. In order to prevent food poisoning or intoxication from botulism, new methods of monitoring the production base on hurdle technology were investigated. New methods investigated incorporated citric acid, sodium hypophosphite, Monascus anka mash, plum paste or lactic acid bacteria inoculum added separately to meat with steamed rice and salt to lower the Aw (water activity) and pH values of the products to control the microbial growth. Results showed that anaerobic bacterial counts, lactic acid bacterial counts and aerobic bacterial counts for the products of all treatments were less than $10^6$, $10^5$ and $10^2cfu/g$, respectively. Sodium chloride content of all products was above 5.46%, water activity was below 0.939 and pH value was below 4.27. IMP was lower and ATP and hypoxanthine were higher. ATP concentrations were higher in the samples which contained the anka mash. Result of sensory panel test indicated that most people preferred the products with added sodium hypophosphite. Except for the fact that the content of tryptamine in the sample with Monascus anka mash was higher, the amine concentrations for all treatments were lower than those of other fermented meat products. The amino acid nitrogen content was higher in the product made from raw meat treated with citric acid, but lower in the other products. Neither Clostridium botulinum nor Trichinella spiralis were detected in any of the treatments. The result may indicate that hurdle technology is effective for hygiene and safe producing Si-Raw.

산업체 급식소에서 제공되는 음식의 조리후 보관방법에 따른 품질평가 (A Study on the Quality Control for the Holding Method of Food Served by an Industry Foodservice Establishment)

  • 김혜영;고성희
    • 한국식품조리과학회지
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    • 제12권2호
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    • pp.129-137
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    • 1996
  • The purpose of this study was that to estimate the microbial and sensory quality by the method and time of holding in the step of holding of Cow's Knee Broth, Stir-Fry Pork and Cooked Cuttlefish that were provide at the industry foodservice establishment, then to suggest safer feeding by the reasonable holding method. The results are as follows: Cow's Knee Broth: holding at room temperature was shown that the number of mi- crobiology by passage of the holding time was higer than the case of holding at steam table, but it was lower after reheating it. As a result of sensory test, it was exellent to holding at steam table and to reheat after holding room temperature within four hours and six hours each. Stir-Fry Pork: as a result of microbial analysis, in the case of holding at the steam table microbes increased safer two hours, but after four and six hours they little reduced. In the case of holding at room temperature the number of microbes increased according to the passage of time. As a result of sensory analysis, its taste of room temperature holding was fine until four and six hours each. Cooked Cuttlefish: as a microbial analysis, it was shown that the amount of total plate counts of room temperature holding ten times as high as the latter after six hours. As the result of sensory analysis, the cold holding was better until six hours and the room temperature holding was fine just until two hours. As a result of food poisoning bacteria, it was negative in every test in sample against Salmonella, Staphylococcus aureus, Vibrio parahaemolyticus.

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해양미생물 Sphingomonas paucimobilis AS-1이 생산하는 새로운 extracelluar agarase의 정제 및 특성 (Purification and Properties of a Novel Extracellular Agarase from Marine Bacterium, Sphingomonas paucimobilis AS-1)

  • 정일선;김유정;송효주;갈상완;최영주
    • 생명과학회지
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    • 제18권1호
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    • pp.103-108
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    • 2008
  • Agar로부터 oligosaccharides를 제조하기 위하여 효소(agarase)를 이용한 분해법이 시도되면서 agarase의 균주의 분리 및 유전자에 대한 많은 연구가 수행되고 있다. 본 연구에서는 해양으로부터 agarase를 생성하는 균주를 분리 동정하고 균주의 특성을 조사하였다. 분리된 균주는 VITEK 2 compact version 분석 결과 Sphingomonas paucimobilis AS-1로 동정되었다. 정제된 효소의 최적 활성 조건 및 agar 분해산물의 항산화활성을 조사하였다. 분리된 균주의 최적배양조건은 marine broth 2216에서 온도 $27^{\circ}C$, pH 7일 때 가장 균주의 생육이 높았다. Agarase 효소는 salt침전, ion exchange와 gel filtration chromatography에 의해 114.4 units/mg으로 104배 정제되었다. 정제된 agarase의 SDS-PACE 결과 분자량이 약 80 kDa의 band를 얻었다. 최적 효소활성은 온도 $40^{\circ}C$, pH 7일 때 나타났다. Agar 첨가한 배지에 agar 분해균을 접종한 후 분해산물의 시간에 따른 항산화활성은 12시간 배양 후 72%의 가장 높은 전자소거능(EDA)을 나타내었다. Agar 분해산물은 식중독균의 생육은 저해하는 것으로 나타났으며 젖산균의 생육은 약간 촉진하는 경향을 나타냈다.

꿩고기 가공제품의 저장중 미생물과 휘발성 염기태질소의 변화 (Changes in Microbial Contents and Volatile Basic Nitrogen of Pheasant Meat Products during Storage)

  • 최성현;김찬조;최성희;오홍록
    • 농업과학연구
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    • 제25권2호
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    • pp.168-175
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    • 1998
  • 꿩고기 가공제품들의 저장성을 평가하기 위하여 이들 제품을 온도별로 저장하면서 호기성 및 혐기성 세균과 식중독균을 검사하고 VBN 함량을 측정하여 그 신선도 유지상태를 검사하였다. 1. 가공제품의 저장 중 Salmonella, Shigella, Staphylococcus속 균 등 식중독 원인균과 Escherichia coli는 어느 제품에서도 검출되지 않았다. 2. 저장온도가 높을수록 호기성 및 혐기성 미생물의 증식속도가 빨라 $20^{\circ}C$$30^{\circ}C$ 저장에서는 대부분의 제품들이 5~10일 이내에 $10^6/g$ 이상의 균수를 보였으나 frank sausage, Ioin harm, pressed ham, salad 제품은 $20^{\circ}C$ 저장시 20~30일까지 $10^5/g$ 이하의 균수를 보였다. 3. $10^{\circ}C$ 저장에서는 훈연제품, 전기구이, pressed ham은 10일 이내에 $10^4/g$ 이상을 보였으나, frank sausage, Ioin ham, salad 제품은 $10^3/g$ 이하를 보여 비교적 좋은 저장성을 보였다. 4. 가공제품의 저장온도가 높을수록 VBN 함량이 높았으며, 훈연제품, 전기구이, frank sausage는 $10^{\circ}C$ 저장에서도 5일에 40mg%, 10일에 80mg% 이상을 보여 가식한계를 벗어났으나, Ioin ham, pressed ham, salad는 $10^{\circ}C$ 저장에서 10일까지 20mg%이하의 VBN 값을 보여 비교적 양호한 저장성을 보였다. 이상의 결과로 보아 꿩고기 가공제품들은 비교적 저장성이 약한 것으로 보이나 이들중 Ioin ham과 salad는 타제품에 비하여 저장성이 좋아 $10^{\circ}C$에서 약 10일 정도의 보존이 가능하다고 사료되며, Ioin ham과 salad 외의 제품들은 $10^{\circ}C$ 이하의 냉장 및 냉동유통이 바람직하다고 사료된다.

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Listeria monocytogenes와 Salmonella spp.에 대한 Sodium Hypochlorite 및 Benzalkonium Chloride의 유효성 평가 (Evaluation on Efficacies of Sodium Hypochlorite and Benzalkonium Chloride against Listeria monocytogenes and Salmonella spp.)

  • 김형일;윤혜정;최현철;전대훈;엄미옥;성준현;박나영;원선아;김남희;성덕화;곽효선;권기성;이영자
    • 한국식품위생안전성학회지
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    • 제22권2호
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    • pp.132-136
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    • 2007
  • 살균소독력 평가균주로 사용되는 E. coli ATCC 10536과 Staphylococcus aureus ATCC 6538균에 대하여 5 logCFU/ml 감소의 살균소독력을 보이는 살균소독제가 국내에서 식중독을 일으키고 있는 식중독 원인균 중 Salmonella spp.와 Listeria monocytogenes에 대하여도 같은 살균소독력을 나타내는지 비교평가하였다. 청정조건 및 오염조건에서 현탁액시험법을 사용하여 차아염소산나트륨과 염화벤잘코늄의 살균소독력을 평가하였다. 시험균주로는 E. coli ATCC 10536, Staphylococcus aureus ATCC 6538, Salmonella typhimurium ATCC 13311, Salmonella Enteritidis ATCC 13076, Listeria monocytogenes ATCC 19111, Salmonella spp. 10균주 및 Listeria monocytogenes 11균주를 사용하였다. 오염조건에서는 염화벤잘코늄만이 살균소독제의 유효성분 사용범위 농도 내에서 5 log 감소 이상의 살균소독력을 보였으나, 청정조건에서는 실험대상 균주 전부 5 log감소 이상의 살균소독력을 보였다.

대구시 북구지역의 식용얼음에서 세균 분포 및 동정 (Identification and Distribution of the Pathogenic Microorganisms Isolated from Edible Ice in North Area of Daegu, Korea)

  • 김수정
    • 미생물학회지
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    • 제45권1호
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    • pp.86-90
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    • 2009
  • 식용얼음은 식품의 제조 가공 조리 등에 직접 사용하거나 그대로 먹기 위해 먹는 물을 얼린 얼음을 뜻하며 얼음의 제조 및 판매 과정에서 미생물이 교차 오염되면 식중독 및 장염을 유발한다. 또한 식용얼음 뿐만 아니라 상수계통, 약수물, 상수와 냉온수기의 정수된 물에서도 여러 가지 원인에 의해서 세균이 증식하는 것으로 나타났다. 이런 이유로 대구시 북구지역에서 생산되는 식용얼음의 위생 상태를 살펴보고자 무작위로 15곳을 선정하여 Brain Heart Infusion 배지에서 세균을 배양한 결과 1곳을 제외한 14곳의 검체에서 균이 증식 되었고 그람염색 결과, 그람음성간균이 80% 차지하였고 그람양성구균 17% 그리고 그람음성구균 3%의 분포를 나타냈다. 그람음성간균의 잠정적인 동정방법으로 API 20E kit와 API 20NE kit를 이용한 결과 Enterobacter cloacae, Chryseomonas luteola, Pantoea spp., Klebsiella pneumoniae, Acinetobacter baumannii, Acinetobacter calcoaceticus, Providencia rettgeri 등이 검출 되었다. 5곳에서 분리된 그람양성구균을 API Staph kit를 이용한 잠정적 동정결과 L업소에서 분리된 균은 식중독을 일으키는 병원성이 강한 Staphylococcus aureus로 동정되었다. 본 연구에서는 대구시 북구 지역의 식용 얼음류에 존재하는 일반세균 및 병원성 세균의 분포를 조사함으로 식용얼음의 위생 상태에 대한 주의를 부각시키고 나아가 대구시 타지역의 식용얼음에 대한 세균분포 조사 및 위생상태 점검에 대한 필요성을 시사한다.

Comparison of Antimicrobial Activity of Electrolyzed Water Using Various Electrodes against Biofilm of Oral Pathogens

  • Yoo, Yun S;Shin, Hyun-Seung;Lee, Sung-Hoon
    • International Journal of Oral Biology
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    • 제40권3호
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    • pp.135-141
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    • 2015
  • Biofilms of oral microbes can cause various diseases in the oral cavity, such as dental caries, periodontitis and mucosal disease. Electrolyzed water generated by an electric current passed via water using a metal electrode has an antimicrobial effect on pathogenic bacteria which cause food poisoning. This study investigated the antimicrobial activity of electrolyzed waters using various metal electrodes on the floatage and biofilms of oral microbes. The electrolyzed water was generated by passing electric current using copper, silver and platinum electrodes. The electrolyzed water has a neutral pH. Streptococcus mutans, Porphyromonas gingivalis and Tannerella forsythia were cultured, and were used to form a biofilm using specific media. The floatage and biofilm of the microbes were then treated with the electrolyzed water. The electrolyzed water using platinum electrode (EWP) exhibited strong antimicrobial activity against the floatage and biofilm of the oral microbes. However, the electrolyzed water using copper and silver electrodes had no effect. The EWP disrupted the biofilm of oral microbes, except the S. mutans biofilm. Comparing the different electrolyzed waters that we created the platinum electrode generated water may be an ideal candidate for prevention of dental caries and periodontitis.

식육 및 식육가공품 섭취에 따른 안전성 및 식중독 위험성 인식 (Perception of Food Safety and Risk of Foodborne Illness with Consumption of Meat and Processed Meat Products)

  • 최소정;박진화;김한솔;조준일;주인선;곽효선;허진재;윤기선
    • 한국식품조리과학회지
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    • 제32권4호
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    • pp.476-491
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    • 2016
  • Purpose: This study investigated consumers' perception of food safety and risk from foodborne illness and consumption pattern of meat and processed meat products in Korea. Methods: A quantitative survey was performed by trained interviewers, surveying 1,500 adults who were randomly selected from six major provinces in Korea. Results: Most of the respondents reported foodborne illness risk related to the consumption of raw meat but not related to heated meat and processed meat products. As respondents perceived the risk of food poisoning from raw meat, the purchase and intake decreased (p<0.001). Most of the respondents considered a low possibility of foodborne illness at home. Seventy-seven percent of the respondents thought that bacteria and virus are the main causes of foodborne illness. Improper storage practice (40.7%) and unsafe food material (29.3%) were the main risk factors contributing to foodborne illness. Perception and practice of food safety was significantly different by the residency area. The most preferred meat, processed meat, and processed ground meat products were pork (58%), ham (31.1%), and pork cutlet (40.4%), respectively. The most preferred cooking method was roasting, regardless of the type of meat, but the second preference for cooking method was significantly affected by the type of meat (p<0.001): stir-fried pork, beef with seasoning, fried-chicken and boiled duck. Frequency of eating out was 0.75/day on weekdays and 0.78/day on weekends at the mainly Korean BBQ restaurant. Conclusion: The results of this study could be used to develop science-based education materials for consumer and the specific guideline of risk management of meat and processed meat products.

발효유제품내에서 Escherichia coli O157:H7과 Salmonella ser. typhimurium의 생존 (Survival of Escherichia coli O157:H7 and Salmonella ser. typhimurium in Fermented Milk Products)

  • 김현욱;안영태;임정현;강호진;장영호
    • 한국식품위생안전성학회지
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    • 제12권3호
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    • pp.175-180
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    • 1997
  • Escherichia coli O157:H7 and Salmonella ser. typhimurium are pathogens involved in food poisoning in numerous countries. This study aimed to obtain knowleges on the survival of E. coli O157:H7 KSC 109 and S. ser. typhimurium ATCC 14028 in fermentedmilk products which were on sale in Suwon Yakult supplier. To the final concentration of 103~104 cfu/$m\ell$ of E. coli O157:H7 KSC 109 or S. wer. typhimurium ATCC 14028 in the fermented milks, Metchnikoff, Ace, Yakult, Mastoni and Super 100 were inoculated with these pathogens and then were stored at 4$^{\circ}C$ and viable cells of these pathogens were periodically counted. The results showed that the survival of two pathogens differed in the different types of fermented milks tested. Number of suriviving E. coli O157:H7 KSC 109 and S. ser. typimurium ATCC 14028 cells (initial inoculum, 103~104 cfu/$m\ell$) were decreased to 101, 102 cfu/$m\ell$ in Ace after 100 hours, and were decreased gradually to 101 cfu/$m\ell$ in Yakult after 250 hours. In the other fermented milks, viable cells of E. coli O157:H7 KSC 109 was not drastically decreased but those of S. ser. typhimurium ATCC 14028 was decreased gradually to 102 (Mastoni), and to 101 cfu/$m\ell$ (Super 100) after 250 hours. It appeared that S. ser. typhimurium ATCC 14028 was more susceptible than E. coli O157:H7 KSC 109 at low pH. Vibale cells of E. coli O157:H7 KSC 109 was not drastically decreased in most of fermented milks tested except Ace and Yakult, but in general, S. ser. typhimurium ATCC 14028 was drastically decreased in most of the fermented milks. The major ingibition factor against these pathogens in the fermented milks during storage at 4$^{\circ}C$ appeared to be the acidity and the metabolites produced by the starters bacteria used in fermented milk products.

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