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Korean J. Vet. Serv. 2019; 42(2): 117-120
Published online June 30, 2019
https://doi.org/10.7853/kjvs.2019.42.2.117
© The Korean Socitety of Veterinary Service
Identification of Korean native cattle persistently infected with BVDV using Ear-notch method
Correspondence to : Laboratory of Veterinary Infectious Disease, College of Veterinary Medicine, Chonbuk National University
Bovine viral diarrhea Virus (BVDV) infections cause respiratory, gastrointestinal, and reproductive problems, such as infertility, abortion, stillbirth, and sickly offspring. Many countries have reduced the economic damage through the application of different control programmes, and some have successfully eradicated BVD. Detection and elimination of cattle persistently infected (PI) with BVDV is important for BVD eradication because PI cattle are a main source of BVD transmission. In this study, the prevalence of Korean native cattle persistently infected (PI) with BVDV was investigated and determined in 49 farms with 3,050 cattle. The all samples were collected by ear notch sampling. Korean native cattle with initial positives on antigen-ELISA (Ag-ELISA) were sampled again after 3~4 weeks and cattle with second positives in both Ag-ELISA and immunohistochemistry (IHC) were identified as PI cattle. Among the 49 farms, 14 (28.6%) farms had at least more than one PI cow and 21 (0.69%) of 3,050 cattle were determined as PI cattle. As a result of this work, it is suggested that national BVD eradication program is required to reduce economic losses by BVDV infection in Korean cattle industries.
Keywords Bovine viral diarrhea virus,Cattle,Persistently infected,
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Research Article
Korean J. Vet. Serv. 2019; 42(2): 117-120
Published online June 30, 2019 https://doi.org/10.7853/kjvs.2019.42.2.117
Copyright © The Korean Socitety of Veterinary Service.
Identification of Korean native cattle persistently infected with BVDV using Ear-notch method
Kim, Youngsik;Kim, Yongkwan;Lee, Sook-Young;Lee, Kyoung-Ki;Lee, Kyung-Hyun;Song, Jae-Chan;Oem, Jae-Ku;
Laboratory of Veterinary Infectious Disease, College of Veterinary Medicine, Chonbuk National University;Environmental Health Research Department, National Institution of Environmental Research;Environmental Health Research Department, National Institution of Environmental Research;Animal Disease Diagnostic Division, Animal and Plant Quarantine Agency;Animal Disease Diagnostic Division, Animal and Plant Quarantine Agency;College of Veterinary Medicine, Kyungpook National University;Laboratory of Veterinary Infectious Disease, College of Veterinary Medicine, Chonbuk National University;
Correspondence to:Laboratory of Veterinary Infectious Disease, College of Veterinary Medicine, Chonbuk National University
Abstract
Bovine viral diarrhea Virus (BVDV) infections cause respiratory, gastrointestinal, and reproductive problems, such as infertility, abortion, stillbirth, and sickly offspring. Many countries have reduced the economic damage through the application of different control programmes, and some have successfully eradicated BVD. Detection and elimination of cattle persistently infected (PI) with BVDV is important for BVD eradication because PI cattle are a main source of BVD transmission. In this study, the prevalence of Korean native cattle persistently infected (PI) with BVDV was investigated and determined in 49 farms with 3,050 cattle. The all samples were collected by ear notch sampling. Korean native cattle with initial positives on antigen-ELISA (Ag-ELISA) were sampled again after 3~4 weeks and cattle with second positives in both Ag-ELISA and immunohistochemistry (IHC) were identified as PI cattle. Among the 49 farms, 14 (28.6%) farms had at least more than one PI cow and 21 (0.69%) of 3,050 cattle were determined as PI cattle. As a result of this work, it is suggested that national BVD eradication program is required to reduce economic losses by BVDV infection in Korean cattle industries.
Keywords: Bovine viral diarrhea virus,Cattle,Persistently infected,
