ARTICLE TYPE : RESEARCH ARTICLE
Published on : 11 May 2026,
Volume - 2
Journal Title :
WebLog Journal of Veterinary Science and Animal Husbandry
| WebLog J Vet Sci Anim Husb
| WJVSAH
Source URL:
https://weblogoa.com/articles/wjvsah.2026.e1101
Permanent Identifier (DOI) :
https://doi.org/10.5281/zenodo.20177437
Using RT-PCR Method for Accelerated Health Improvement of Herd of Cows from Leukemia
2Bryansk State University Named After Academician I.G. Petrovsky, Bryansk, Russia
3Kazan State Agrarian University, Republic of Tatarstan, Kazan, Russia
4Russian State Agrarian University, Moscow Timiryazev Agricultural Academy, Timiryazevskaya St., Moscow, Russia
Abstract
The spread of enzootic leukemia is a global problem of cattle breeding
The leukemia virus causes blood disease in 29 species of animals and 15 species of domestic and wild birds. Bovine enzootic leukemia (international designation of bovine leukemia) is included in the list of diseases of the World Organization for Animal Health, as a disease subject to mandatory notification (notification to the international community). The high prevalence of bovine leukemia virus in cattle herds in livestock farms represents a danger to the whole world, threatening not only cattle breeding, but also public health. The infection rate of animals with leukemia in large farms in a number of countries reaches 85%, and in some cattle breeds in the USA it is about 50%. In Russia, leukemia firmly occupies the first place among infectious diseases of cows.
When infected, the proviral DNA is embedded in the genome of blood cells. The development of the disease has a long incubation period of 5-6 years, which is asymptomatic, which, in the absence of proper measures to combat leukemia, can lead to the uncontrolled spread of the virus in herds of cows. Clinical signs of leukemia in sick animals appear several years after infection: enlarged lymph nodes, the appearance of tumors, weight loss, decreased productivity. The appearance of symptoms of the disease has no diagnostic value, since they manifest themselves only at the terminal stage, ending within a few weeks with the death of the animal [1]. Enzootic leukemia in cows is not being treated, and the identified sick animals must be immediately culled.
Citation
Irina Ya. Nam, Zayakin VV, Achmedov RB, Achmetov TM, Solovjeva OI. Using RT-PCR Method for Accelerated Health Improvement of Herd of Cows from Leukemia. WebLog J Vet Sci Anim Husb. wjvsah.2026.e1101. https://doi.org/10.5281/zenodo.20177437