Современные Методы И Опыт Борьбы С Лейкозом Крупного Рогатого Скота

Зубова, Т. В.; Pleshkov, Vladimir Alexandrovich; Миронов, А. Н.

doi:10.12731/wsd-2018-5-119-131

Cited by 5 publications

(1 citation statement)

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“…Leukosis is still registered in cattle from Asia (Yang et al, 2016) and North America (Polat et al, 2016). It also continues to be registered in countries neighbouring, Ukraine, including Russia, Belarus, Moldova and Turkey (Zubova et al, 2018;Makarov & Lozovoy, 2020).…”

Section: Introductionmentioning

confidence: 99%

Retrospective analysis of the epizootic situation of enzootic bovine leukosis in Ukraine in 1994–2019

Korniienko¹,

Pyskun²,

Tsarenko

et al. 2020

Regul. Mech. Biosyst.

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In Ukraine, prevention and control measures of bovine leukosis were regulated by relevant legislation, regulations and instructions developed in the period 1960–1992. Currently, the instruction on prevention and rehabilitation of this disease in cattle is used (approved in 2007). According to it, the identification of infected animals is carried out from 6 months of age by serological (first scheme in AGID or another in ELISA) and genomic (PCR) methods. The infected animals are removed from the herd or slaughtered. In general, because of the diagnostic and preventive measures carried out during the analyzed period (26 years) 10 519 farms were rehabilitated from leukosis (2 346 affected farms remained from previous years). At the same time, more 4 million infected cattle were slaughtered. The majority of affected farms (more than 1 000) were registered in the period between 1994 (2 346 farms) and 2003 (1 247 farms). Since 2014, the number of affected farms has remained mostly below 10 and the number of infected cattle has decreased to 2 000 animals per year. At the same time, the number of rehabilitated farms also decreased (from 1 307 farms in 1998 to 4 farms in 2014). The same trend was registered with the dynamics of the number of animals that were removed from the herd due to leukosis. Thus, in 1995 and 1997 their numbers were 321 178 and 558 649 animals, respectively, and in 2014 it was 1 124. The obtained indicators of intensity and extensiveness of the epizootic process show that the incidence rate was maximal during 1998–2000 and amounted to 3.7–4.3%. The maximum indicators of the coefficient of affection were recorded in 1997–2000 and equal 11.8–15.3%. The rate of foci remained on the level of 90–270 throughout the all analyzed period. During 2008–2019, specialists of the Ukrainian veterinary laboratories investigated more than 47 million samples of cattle blood sera for enzootic bovine leukosis by AGID and ELISA. However, despite the significant diagnostic work, the important factor in the decrease of the number of affected farms and infected animals is the decrease in the total number of cattle in Ukraine (almost 22 million animals in 1994 against 3 million in 2019). Graphic trends of these indicators are comparable and agree with the decrease in the number of cattle in our country by analyzed period. After 2014, the number of affected farms ranged 10–17 per year (mostly in private households). However, the full recovery of cattle in Ukraine from bovine leukosis has not taken place, although our country is closer than ever to this.

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Section: Introductionmentioning

confidence: 99%

Retrospective analysis of the epizootic situation of enzootic bovine leukosis in Ukraine in 1994–2019

Korniienko¹,

Pyskun²,

Tsarenko

et al. 2020

Regul. Mech. Biosyst.

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Prevention and rehabilitation of dairy herd from cattle leukemia

Зубова

Pleshkov

Chalova

et al. 2019

IOP Conf. Ser.: Earth Environ. Sci.

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The main diagnostic aids and response methods for the cattle leukemia virus that are currently used are represented in the article. The wide spread of the disease is caused by a fairly easy transmission of the virus, the lack of early diagnostic methods, vaccination and treatment. The problem of the cattle leukemia virus is very acute and is an urgent issue in animal husbandry, which requires an urgent solution.

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Results of the implementation of sanitation measures in the farms unfavorable for bovine leukemia

Dvoeglazov

Agarkova

Osipova

et al. 2023

Sib. vestn. s-h. nauki

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The dynamics of recuperation work on the example of two farms similar in economic and production and technological characteristics of the Novosibirsk region were studied. The data on leukemia at the time of the beginning of active recuperation work and the results after several years were presented. The infection rates of the livestock by different age groups and in different parts of the studied farms were analyzed for 2017-2022. The infection rate of cows on the farms tended to decrease slightly from 2017 to 2019 and was in the range of 8-4%. The infection rate of the heifers was 5-12%. Registration of new cases of serology response in the group of the calves in the farm No. 1 decreased from 9.9 to 4.9%, in the farm No. 2 from 14.2 to 7.1%. The positive dynamics of implementation of the recovery plan using enzyme-linked immunosorbent assay (ELISA) for serological diagnosis was shown. After switching from the immunodiffusion in agar gel reaction (AGID) to ELISA and its first use, the number of newly detected animals increased in all age groups in both farms compared to the previous period. In subsequent studies, the percentage of new cases decreased significantly. Physical separation of the groups of animals with different statuses, placing them in different sections and clear control with the immediate exclusion of infected animals from the production process led to a noticeable improvement in the epizootic situation on the farm. Aspects causing delay in sanitation work were noted, in particular, untimely separation of animals into groups after serological diagnosis and establishment of their infection status. Complete replacement of infected cattle in unhealthy herds or wards by groups of serology-negative animals can significantly reduce the recovery period, especially at the final stage.

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Современные Методы И Опыт Борьбы С Лейкозом Крупного Рогатого Скота

Cited by 5 publications

References 0 publications

Retrospective analysis of the epizootic situation of enzootic bovine leukosis in Ukraine in 1994–2019

Retrospective analysis of the epizootic situation of enzootic bovine leukosis in Ukraine in 1994–2019

Prevention and rehabilitation of dairy herd from cattle leukemia

Results of the implementation of sanitation measures in the farms unfavorable for bovine leukemia

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