Tehran University of Medical Sciences Journal of Food Safety and Hygiene 2476-3241 1 1 2015 10 05 18 21 EN Issa Mohammad-pourfard Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Mohammad Rezaei Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Mehran Sayadi Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Nabi Shariatifar Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran AliAsghar Behzadi Department of Food Safety and Hygiene, School of Public Health, Yazd University of Medical Sciences, Yazd, Iran Fereshteh Karimi Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran 2015 10 05 2015 10 05 Dicrocoelios is is one of the zoonotic dis eas es in the world that have public health and economic  pers pectives .  The  aim of this  s tudy  was  to  inves tigate  the  prevalence  of dicrocoelios is  in  s laughtered  animals  in  the  indus trial  s laughterhous e of Arak, Iran (2007– 2010). In this  s tudy, we inves tigated 648,994 head of animals  including, 292,797 s heep, 81,012 cows and 275,185  goats . Their carcas s es were ins pected us ing macros copic method for hydatid cys t in livers and lungs . Data analys is was performed by Chi-s quare tes t and IBM SPSS s oftware (vers ion 16.0). The prevalence frequency of dicrocoelios is in s laughtered  cattle was 7550 head with the mos t infected animals of 3359 goats , 3198 s heep, and 993 cows , res pectively. Meanwhile, the year 2008 with the 1.9% of infected cattle and year 2010 with a 0.7% of infected cattle were the highes t and lowes t infected cattle  years .  Dicrocoelios is  prevalence  of  infection  is  relatively  low,  but  incurring economic  los s es  due  to  the  deleting  of infes ted  organs  of animals  and  decreas e in lives tock products , indicates  the exis tence of conditions  for health ris ks for res idents which requires more inclus ive and comprehens ive s anitary and control meas ures due to this paras ite’s life cycle and trans mis s ion . https://jfsh.tums.ac.ir/index.php/jfsh/article/view/4 https://jfsh.tums.ac.ir/index.php/jfsh/article/download/4/4