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Risk Surveillance and Assessment of Food Safety in Shanghai

Risk Surveillance and Assessment of Food Safety in Shanghai. Resume. Name: Chunfeng Wu Position : Shanghai Municipal Center for Disease Control and Prevention Education: 1999~2004 Bachelor of Medical Sciences Public Health College, Fudan University

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Risk Surveillance and Assessment of Food Safety in Shanghai

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  1. Risk Surveillance and Assessment of Food Safetyin Shanghai

  2. Resume • Name: Chunfeng Wu • Position: Shanghai Municipal Center for Disease Control and Prevention • Education: 1999~2004 Bachelor of Medical Sciences Public Health College, Fudan University 2008~ Reading for MPH in Fudan University

  3. Work Experience • 2004.7~ Work in Department of Food Hygiene and Food-borne Disease Control • 2008.5.22~2008.6.11 Go to Sichuan province to provide health and epidemic prevention after “Wenchuan Earthquake” • 2008.8.24~2008.9.2 Participate in a workshop held by U.S. CDC Epi-Ready Team : Foodborne Illness Response Strategies

  4. Framework of our jobs Food-borne Disease Surveillance Food Contamination Monitoring Research Risk Assessment Evaluate Prevention, Intervention Food-borne Outbreaks Investigation and Response

  5. Food-borne Diseases Surveillance • Food Contamination Monitoring • Others

  6. Food-borne Disease Surveillance • In order to estimate the incidence of food-borne diseases in Shanghai • Refer to the theory of FoodNet • Establish the surveillance in the beginning of 2006

  7. FoodNet • The project consists of active surveillance for foodborne diseases and related epidemiologic studies Covers population of 37.6 million or 13.8% of the United States population

  8. Burden of Illness PyramidCases reported through passive surveillance represent fraction of actual number of cases in community

  9. Passive surveillance system Hospital (pathogen surveillance) Community (food-borne diarrhea symptom surveillance) Food-borne Disease Surveillance School Drugstore The Current Surveillance Pyramid

  10. Community symptom surveillance • Select 4 communities every district • Sample 120 residents every community • Face to face investigation every month • Collect the data of food-borne diarrhea symptom • Deduce the incidence of food-borne diseases in general population

  11. Hospital pathogen surveillance • Select 6 hospitals every district • Report all the cases in Enteric Diseases Clinic obtain specimen such as stool test Salmonella/E coli/Vibrio/Shigella • Collect chemical food poisoning cases in emergency room • Conclude the main causes of food-borne disease

  12. No formal surveillance • Drugstore surveillance 2 stores every district Explore the status of antidiarrhoeal drug and enteric antiseptics One kind of data to estimate the burden • School surveillance 4 schools every district Determine the proportion of student absence for diarrhea Incidence in a particular population

  13. Passive surveillance • Report the food-borne outbreaks online • In a prescriptive time • Hospital district CDC municipal CDC

  14. During 1990 and 2000 in Shanghai, 68.8% foodborne outbreaks caused by bacterial, 23.9% caused by chemical

  15. 63.7% bacterial food-borne outbreaks caused by Vibrio parahaemolyticus

  16. Food Contamination Monitoring • Determine the level of food contamination and its dynamic trend • According to Global Environment Monitoring System - Food Contamination Monitoring and Assessment (GEMS/Food) and national monitoring programme • Establish the monitoring in 2002

  17. Sample the monitoring sites such as supermarkets based on population distribution and living standard urban 2007

  18. Consumers’ routine purchases were imitated in those places for sampling food • commissariat and commissariat products • vegetable and vegetable products • fruits and fruit products • meat and meat products • aquatic products • milk and milk products • Etc. About 100 kinds and 5,000 pieces of food sample every year

  19. Chemical contamination: • Heavy metal  • Pesticide • Veterinary drugs • Food additive • Etc. Food contamination • Bacterial contamination: • Salmonella • Listeria monocytohenes • Vibrio parahaemolyticus • E coli O157 • Staphylococcus • Etc.

  20. Others Risk assessment: • Finish the assessment of lead and cadmium • The main sources of lead and cadmium were rice, tint vegetables, fish and shrimp • Overall, the dietary lead and cadmium intakes were safe in Shanghai residents • Dietary cadmium intake was on a high level in children in whom P90 of cadmium intake is over PTWI

  21. My study: • Quantitative risk assessment of heavy metal in aquatic product • Finished gathering the data of aquatic product consumption • testing the concentration of lead and cadmium • Next to do • Monte Carlo simulation ? • software @RISK 5.0 analysis ?

  22. Primary results Status of Pb in aquatic product(mg/Kg) 0.81 0.9 0.8 0.7 0.6 0.41 0.39 mean 0.5 P90 0.27 0.4 max 0.24 0.19 0.2 0.3 0.13 0.092 0.091 0.2 0.078 0.036 0.1 crustacean 0 Marine fish mollusc Fresh water fish Pb concentration in mollusc is higher than in fresh water fish

  23. Status of Cd in aquatic product(mg/Kg) 0.91 1 0.9 0.8 0.7 0.55 0.6 mean 0.5 P90 0.4 max 0.3 0.18 0.15 0.16 0.079 0.2 0.081 0.031 0.022 0.015 0.013 0.1 0 crustacean Marine fish Fresh waterfish mollusc Cd concentration in mollusc and crustacean is much higher than in marine and fresh water fish

  24. Current situation • 《Food Safety Law》had brought into effect from Jun 1st CDC has responsibility of food-borne outbreaks investigation FDA do this job now, we have little experience to deal with the field epidemiological investigation

  25. 2010 World Expo will be held in Shanghai • will be held from May to Oct • 70~75 millions • person-times will visit • bacteria proliferate befittingly • pesticide using increase food contaminated incident food-borne outbreaks • food consumption increase • more people will eat in restaurants

  26. Development • Increase the quality and sensitivity of surveillance and monitoring • Practice food-borne outbreaks investigation and response • Accumulate experiences of risk assessment • Enrich the methods of intervention

  27. Activities • Be familiar with Epidemiological methods and applications in food-borne outbreaks investigation and response • Understand more about FoodNet, PulseNet…… How California conduct and act? • Know some fast-testing methods of food contamination • Participate in some jobs or workshops of exposure assessment , especially the use of model and software • Learn to do intervention such as health education and communication

  28. Thank you very much!

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