Prevalence of bovine leukemia virus (BLV) infection in the northeast of Iran
The purpose of this study was to determine the prevalence of bovine leukemia virus (BLV) in Khorasan Razavi and Khorasan Shomali provinces which are the main provinces located in the northeast of Iran. Total number of 429 blood samples were collected from industrial dairy herds. The samples were cat...
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| Format: | Article |
| Language: | English |
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Urmia University
2014-06-01
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| Series: | Veterinary Research Forum |
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| Online Access: | http://www.urmia.ac.ir/vrf/Shared%20Documents/pdf/vol-5%20no-2/135-139-1104.pdf |
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| author | Shalaleh Mousavi Alireza Haghparast Gholamreza Mohammadi Seyed-Elias Tabatabaeizadeh |
| author_facet | Shalaleh Mousavi Alireza Haghparast Gholamreza Mohammadi Seyed-Elias Tabatabaeizadeh |
| author_sort | Shalaleh Mousavi |
| collection | DOAJ |
| description | The purpose of this study was to determine the prevalence of bovine leukemia virus (BLV) in Khorasan Razavi and Khorasan Shomali provinces which are the main provinces located in the northeast of Iran. Total number of 429 blood samples were collected from industrial dairy herds. The samples were categorized based on province, age (2-3, 4-6, and 7-10 years old), calving (≤ 2, 3-5, and > 5) and herd size (≤ 100, 101-250, and > 250) and examined by indirect ELISA. The results of this study showed that 109 (25.4%) out of 429 serum samples were BLV seropositive. The BLV prevalence among cattle of dairy herds of Khorasan Razavi and Khorasan Shomali provinces were 29.8% and 1.5%, respectively. The results showed that the number of seropositive animals was increased significantly with the age (p < 0.05). The infection rate in animals 2-3, 4-6 and 7-10 years old were 12.1%, 26.7% and 45.6%, respectively. It was shown that BLV prevalence according to calving ≤ 2, 3-5 and > 5 was 15.5%, 33.0% and 42.9%, respectively, with a significant difference between calving ≤ 2 and > 5 (p < 0.001). The prevalence of BLV among herd size of ≤ 100, 101-250 and > 250 was 19.7%, 14.3% and 42.1%, respectively, which was significantly higher in herds with more than 250 cattle (p < 0.05). This study revealed that BLV infection in dairy herds of northeast of Iran was influenced by geographical location (province), age, calving and herd size. |
| first_indexed | 2024-12-20T05:58:36Z |
| format | Article |
| id | doaj.art-4456c34188a741608f80738efe1bab5d |
| institution | Directory Open Access Journal |
| issn | 2008-8140 |
| language | English |
| last_indexed | 2024-12-20T05:58:36Z |
| publishDate | 2014-06-01 |
| publisher | Urmia University |
| record_format | Article |
| series | Veterinary Research Forum |
| spelling | doaj.art-4456c34188a741608f80738efe1bab5d2022-12-21T19:50:57ZengUrmia UniversityVeterinary Research Forum2008-81402014-06-0152135139Prevalence of bovine leukemia virus (BLV) infection in the northeast of IranShalaleh Mousavi0Alireza Haghparast1Gholamreza Mohammadi2Seyed-Elias Tabatabaeizadeh3Department of Pathobiology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, IranDepartment of Pathobiology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran and Veterinary Medicine, Cell and Molecular Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, IranDepartment of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, IranDepartment of Pathobiology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran and Veterinary Medicine, Cell and Molecular Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, IranThe purpose of this study was to determine the prevalence of bovine leukemia virus (BLV) in Khorasan Razavi and Khorasan Shomali provinces which are the main provinces located in the northeast of Iran. Total number of 429 blood samples were collected from industrial dairy herds. The samples were categorized based on province, age (2-3, 4-6, and 7-10 years old), calving (≤ 2, 3-5, and > 5) and herd size (≤ 100, 101-250, and > 250) and examined by indirect ELISA. The results of this study showed that 109 (25.4%) out of 429 serum samples were BLV seropositive. The BLV prevalence among cattle of dairy herds of Khorasan Razavi and Khorasan Shomali provinces were 29.8% and 1.5%, respectively. The results showed that the number of seropositive animals was increased significantly with the age (p < 0.05). The infection rate in animals 2-3, 4-6 and 7-10 years old were 12.1%, 26.7% and 45.6%, respectively. It was shown that BLV prevalence according to calving ≤ 2, 3-5 and > 5 was 15.5%, 33.0% and 42.9%, respectively, with a significant difference between calving ≤ 2 and > 5 (p < 0.001). The prevalence of BLV among herd size of ≤ 100, 101-250 and > 250 was 19.7%, 14.3% and 42.1%, respectively, which was significantly higher in herds with more than 250 cattle (p < 0.05). This study revealed that BLV infection in dairy herds of northeast of Iran was influenced by geographical location (province), age, calving and herd size.http://www.urmia.ac.ir/vrf/Shared%20Documents/pdf/vol-5%20no-2/135-139-1104.pdfBovine leukemia virus; Dairy cattle; Indirect ELISA; Iran; Prevalence |
| spellingShingle | Shalaleh Mousavi Alireza Haghparast Gholamreza Mohammadi Seyed-Elias Tabatabaeizadeh Prevalence of bovine leukemia virus (BLV) infection in the northeast of Iran Veterinary Research Forum Bovine leukemia virus; Dairy cattle; Indirect ELISA; Iran; Prevalence |
| title | Prevalence of bovine leukemia virus (BLV) infection in the northeast of Iran |
| title_full | Prevalence of bovine leukemia virus (BLV) infection in the northeast of Iran |
| title_fullStr | Prevalence of bovine leukemia virus (BLV) infection in the northeast of Iran |
| title_full_unstemmed | Prevalence of bovine leukemia virus (BLV) infection in the northeast of Iran |
| title_short | Prevalence of bovine leukemia virus (BLV) infection in the northeast of Iran |
| title_sort | prevalence of bovine leukemia virus blv infection in the northeast of iran |
| topic | Bovine leukemia virus; Dairy cattle; Indirect ELISA; Iran; Prevalence |
| url | http://www.urmia.ac.ir/vrf/Shared%20Documents/pdf/vol-5%20no-2/135-139-1104.pdf |
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