Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 48 6 2019 06 02 1099 1105 Farzaneh AMINHARATI Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran AND International Campus, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Mohammad Hassan EHRAMPOUSH Department of Environmental Health Engineering, School of Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Mohammad Mehdi SOLTAN DALLAL Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran AND Food Microbiology Research Center, Tehran University of Medical Sciences, Tehran, Iran Mehdi YASERI Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Abbas Ali DEHGHANI TAFTI Department of Disaster and Emergency Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Zahra RAJABI Food Microbiology Research Center, Tehran University of Medical Sciences, Tehran, Iran 2019 06 02 Background: The aim of this study was to assess associations of Citrobacter freundii foodborne outbreaks with environmental factors in various regions of Yazd Province, Iran, 2012–2016. Methods: The public health surveillance data were used for one period of five years reported foodborne disease outbreaks in various regions of the Province. Multilevel regression statistical method was used to analyze associations of climatic and demographic variables with outbreaks. Significant associations were tested using likelihood ratio tests. Results: Results showed a significant association between C. freundii outbreaks and air dust conditions, age groups and various regional cities. Conclusion: The current study revealed necessity of etiologic agent identification for use in foodborne disease outbreak guidance in future outbreaks. Systemic surveillance schemes can help prevent and control similar scenarios using reports of environmental effects on foodborne disease outbreaks.   https://ijph.tums.ac.ir/index.php/ijph/article/view/17347 https://ijph.tums.ac.ir/index.php/ijph/article/download/17347/6415