S Bokaei, K Absalanfard, Mh Fallah Mehrabadi , H Ebrahimzadeh Mosavi , A Ghajari , N Shahbazian,
Volume 13, Issue 3 (Vol.13, No.3, Atumn 2017)
Abstract
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.
Mm Semironi, M Bahrani, Mh Fallah Mehrabadi , N Ranjbar, K Absalanfard, M Tangestani Makan , Mh Rabiee,
Volume 13, Issue 4 (VOl 13, No.4, Winter 2018)
Abstract
Background and Objectives: Brucellosis is one of the most important zoonosis diseases. The aim was to estimate the seroprevalence of brucellosis in rural cattle, sheep, and goat of Bushehr Province.
Methods: This cross-sectional study was conducted in 2012-2014. For the cattle population, a total of 118 villages and 891 cattle and for sheep and goat population, a total of 202 villages, 526 flocks, 3064 sheep, and 7182 goats were included. Samples were examined with Rose Bengal, 2-mercaptoethanol and wright tests.
Results: In the cattle population, 28 out of 118 villages (20.34%, CI 95%: 13.94%-28.73%) and 20 out of 891 cattle (3.36%, CI 95%:2.28-4.77%) were seropositive. Additionally, in the sheep and goat population, 89 out of 202 villages (44.06%, CI 95%: 37.10%-51.20%), 142 out of 526 flocks (27%, CI 95%: 23.25%-31%), and 335 out of 10246 sheep and goats (3.27%, CI 95%: 2.93%-3.63%) were seropositive.
The prevalence at the individual level of all animals was 3.53%in 2012 which was significantly higher than 2013 ( 2.59%) (P=0.02). Totally, in 3 years, the prevalence of brucellosis in sheep (3.88%) was significantly higher than goats (3%) (P = 0.02) and the prevalence in female animals (3.52%) was significantly higher than male animals (1.58%) (P <0.001).
Conclusion: Due to the reduction of the prevalence, the test and slaughter policy together with the could further reduce and control the spread of the disease in the animal population.
