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Zhou Y.J.,Institute of Food Safety and Assessment | Dai Y.,Institute of Food Safety and Assessment | Yuan B.J.,Institute of Food Safety and Assessment | Zhen S.Q.,Institute of Food Safety and Assessment | And 5 more authors.
Epidemiology and Infection | Year: 2013

To determine the burden and distribution of acute gastrointestinal illness (AGI) in the population, a cross-sectional, monthly face-to-face survey of 10 959 residents was conducted in Jiangsu province between July 2010 and June 2011. The adjusted monthly prevalence was 4·7% with 0·63 AGI episodes/person per year. The prevalence was the highest in children aged <5 years and lowest in persons aged 65 years. A bimodal seasonal distribution was observed with peaks in summer and winter. Regional difference of AGI prevalence was substantial [lowest 0·5% in Taicang, highest 15·1% in Xinqu (Wuxi prefecture)]. Healthcare was sought by 38·4% of the ill respondents. The use of antibiotics was reported by 65·2% of the ill respondents and 38·9% took antidiarrhoeals. In the multivariable model, gender, education, season, sentinel site and travel were significant risk factors of being a case of AGI. These results highlight the substantial burden of AGI and the risk factors associated with AGI in Jiangsu province, China. © 2012 Cambridge University Press.

Yan W.X.,China National Center for Food Safety Risk Assessment | Dai Y.,Institute of Food Safety and Assessment | Zhou Y.J.,Institute of Food Safety and Assessment | Liu H.,U.S. Center for Disease Control and Prevention | And 3 more authors.
Epidemiology and Infection | Year: 2015

To determine risk factors for sporadic Vibrio parahaemolyticus gastroenteritis, we conducted a population-based case-control study in sentinel hospital surveillance areas of Shanghai and Jiangsu province, China. Seventy-one patients with diarrhoea and confirmed V. parahaemolyticus infections were enrolled, and they were matched with 142 controls for gender, age and residential area. From the multivariable analysis, V. parahaemolyticus infections were associated with antibiotics taken during the 4 weeks prior to illness [odds ratio (OR) 8·1, 95% confidence interval (CI) 1·2-56·4)], frequent eating out (OR 3·3, 95% CI 1·1-10·1), and shellfish consumption (OR 3·2, 95% CI 1·0-9·9), with population-attributable fractions of 0·09, 0·25, and 0·14, respectively. Protective factors included keeping the aquatic products refrigerated (OR 0·4, 95% CI 0·1-0·9) and pork consumption (OR 0·2, 95% CI 0·1-0·8). Further study of the association of V. parahaemolyticus gastroenteritis with prior antibiotic use and shellfish consumption is needed. © 2014 Cambridge University Press.

Zhou Y.,Institute of Food Safety and Assessment | Du S.,University of North Carolina at Chapel Hill | Su C.,National Institute for Nutrition and Health | Zhang B.,National Institute for Nutrition and Health | And 2 more authors.
Food Policy | Year: 2015

The processed food sector in low- and middle-income countries has grown rapidly. Little is understood about its effect on obesity. Using data from 14,976 participants aged two and older in the 2011 China Health and Nutrition Survey, this paper examines patterns of processed food consumption and their impacts on obesity while considering the endogeneity of those who purchase processed foods. A major assumption of our analysis of the impact of processed foods on overweight and obesity was that the consumption of processed foods is endogenous due to their accessibility and urbanicity levels. The results show that 74.5% of participants consumed processed foods, excluding edible oils and other condiments; 28.5% of participants' total daily energy intake (EI) was from processed foods. Children and teenagers in megacities had the highest proportion of EI (40.2%) from processed foods. People who lived in megacities or highly urbanized neighborhoods with higher incomes and educational achievement consumed more processed foods. When controlling for endogeneity, only the body mass index (BMI) and risk of being overweight of children ages two to eighteen are adversely associated with processed foods (+4.97. BMI units, 95% confidence interval (CI): 1.66-8.28; odds ratio (OR) = 3.63, 95% CI: 1.45-9.13). Processed food purchases represent less than a third of current Chinese food purchases. However, processed food purchases are growing at the rate of 50% per year, and we must begin to understand the implications for the future. © 2015 Elsevier Ltd.

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