Numerical findings on crucial viral pathogens in Rainbow trout (Onchorhynchus mykiss) farms of northern Iran

M. Khosravi, P. Shohreh, R. Khoshbakht
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引用次数: 2

Abstract

Viral hemorrhagic septicemia virus (VHSV), Infectious hematopoietic necrosis virus (IHNV), and infectious pancreatic necrosis virus (IPNV) are documented as the most considerable viral pathogens in Rainbow trout (Onchorhynchus mykiss). This study aimed to evaluate the frequency of these pathogens in 65 farms with suspected clinical signs in northern Iran from March 2016 to February 2018. Logistic regression analysis used to assess the effect of several determinant factors on the occurrence of these pathogens. In total, 19 (29.23%) farms were positive by a reverse transcription-polymerase chain reaction (RTPCR). The frequency of VHSV, IHNV, and IPNV was reported 18.5%, 6.2%, and 4.61%, respectively. The most affected farms (78.95%) used river water. Furthermore, our results revealed that using river water raised the chances of viral disease by 5 times (OR = 5.02; P = 0.01). Correspondence M Khosravi, Department of Pathobiology, Faculty of Veterinary Medicine, Amol University of Special Modern Technologies, Amol, Iran (e-mail: mojtaba.kh.dvm@gmail.com). Thus, using river water was a risk factor for the occurrence of viral pathogens. From four weight groups (A to D); fishes in groups A (fish < 1 gr) and B (1 to 20 gr) were more affected but not statistically significant (P>0.05). This study has provided insight into the frequency of these targeted viruses. Collectively, establishing routine rapid diagnostic programs and setting up basic educational practices can be valuable to design the prevention and control strategies.
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伊朗北部虹鳟(Onchorhynchus mykiss)养殖场关键病毒病原体的数值研究结果
病毒性出血性败血症病毒(VHSV)、感染性造血坏死病毒(IHNV)和感染性胰腺坏死病毒(IPNV)是虹鳟(Onchorhynchus mykiss)中最重要的病毒病原体。本研究旨在评估2016年3月至2018年2月伊朗北部65个疑似临床症状的农场中这些病原体的频率。Logistic回归分析用于评估几种决定因素对这些病原体发生的影响。经逆转录聚合酶链反应(RTPCR)检测,共有19个养殖场(29.23%)呈阳性。VHSV、IHNV和IPNV患病率分别为18.5%、6.2%和4.61%。受影响最严重的养殖场(78.95%)使用河水。此外,我们的研究结果显示,使用河水使病毒性疾病的机会增加了5倍(OR = 5.02;P = 0.01)。通讯M Khosravi,伊朗阿莫尔特殊现代技术大学兽医学院病理生物学系(e-mail: mojtaba.kh.dvm@gmail.com)。因此,使用河水是病毒病原体发生的危险因素。4个体重组(A ~ D);A组(< 1 gr)和B组(1 ~ 20 gr)受影响更大,但差异无统计学意义(P>0.05)。这项研究提供了对这些目标病毒频率的深入了解。总的来说,建立常规的快速诊断方案和建立基本的教育实践对设计预防和控制策略是有价值的。
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