Assessment of factors affecting the persistence of diarrhoeal cases after the explosive epidemic phase of diarrheal disease in Yazd province - summer 2013: an incidence base case-control study

Water and food born diseases are one of the important causes of morbidity and mortality in through the world. The objective of this study was to investigate factors affecting the persistence of diarrheal cases after the explosive epidemic phase of diarrheal disease in Yazd province. We designed a match case control study that was performed on base of incidence cases of diarrhea since 24 Aug, 2013 to 03 Sept, 2013.Characteristics of cases and control were obtained by interviewers using a pre-determined questionnaire. Logistic regression was used at 0.05 significant level. Totally 69 incidences cases of diarrhea were compared with 138 controls. Incidence rate of diarrhea in Yazd province was 13.79 per thousand. The adjusted odds ratio estimate for presence a patient stricken with gastroenteritis in the household was 3.63 [95% CI: 1.43, 9.20]. The adjusted odds ratio for low education, history of the trip, history of contact with patient and eating outside the home were 1.75, 1.55, 1.93 and 1.37 respectively, that increase odds of disease but their effects was not statistically significant. In this study the most important risk factor for diarrhea was history of contact with the person with the disease in the household. This result may indicate the lack of personal hygiene by patients and their relatives and thus transmission of disease to others peoples. Therefore the role of health education and informing about transmission and preventive ways is very important in prevention and control of outbreaks of diarrhea diseases.