Volume 13, Issue 3 (Vol.13, No.3, Atumn 2017)                   irje 2017, 13(3): 253-261 | Back to browse issues page

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Bokaei S, Absalanfard K, Fallah Mehrabadi M, Ebrahimzadeh Mosavi H, Ghajari A, Shahbazian N. Investigation of Outbreaks of Viral Hemorrhagic Septicemia and Associated Risk Factors in Rainbow Trout Farms in Iran, 2014. irje. 2017; 13 (3) :253-261
URL: http://irje.tums.ac.ir/article-1-5823-en.html
1- PhD in Epidemiology, Department of Food Hygiene & Quality Control, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran , sbokaie@ut.ac.ir
2- Professor, Department of Food Hygiene & Quality Control, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
3- Assistant Professor, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
4- Professor, Department of Aquatic Diseases, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
5- PhD Student, Department of Health and Management of Aquatic Diseases, Iranian Veterinary Organization, Tehran, Iran
6- PhD, Department of Health and Management of Aquatic Diseases, Iranian Veterinary Organization, Tehran, Iran
Abstract:   (947 Views)
Background and Objectives: In Iran, rainbow trout farms exist in almost all provinces. Viral hemorrhagic septicemia is one of the most important infectious diseases of the rainbow trout which is a serious threat to the farming industry. This study was conducted to investigate outbreaks in 2014 and identify important determinants of the agent entry and disease occurrence in the farms.
Methods: Data were collected using a structured questionnaire and the disease was detected based on clinical signs and laboratory investigations by PCR methods.
Results: During 52 weeks of the study in 2014, 114 of 1140 (12.63%) farms were affected within 78 zones in 14 provinces. In multivariable analysis, illegal entrance of fries (odds ratio: 7.81, 95% CI: 3.63-16.8), illegal entrance of fish (odds ratio: 5.60, 95% CI: 3.03-10.35) and use of river as the water supply (odds ratio: 2.46, 95% CI: 1.51-4.02) were detected as risk factors associated with virus entry and disease outbreak in farms.
Conclusion: Observing biosecurity measures in the farm level, applying risk-based surveillance based on known risk factors, and assessing these factors on a regular basis are important in prevention and control of VHS.    
Full-Text [PDF 246 kb]   (236 Downloads)    
Type of Study: Research | Subject: General
Received: 2017/12/3 | Accepted: 2017/12/3 | Published: 2017/12/3

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