Bovine leukemia virus INFECTION — DIAGNOSTICS, ERADICATION, AND ANTHROPOZOONOTIC POTENTIAL (BACKGROUND) (review)

Донник, И. М.; Gulyukin, Mikhail; Busol, V. A.; Kovalenko, L. V.; Kovalenko, A. M.

doi:10.15389/agrobiology.2021.2.230eng

Cited by 10 publications

(3 citation statements)

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“…Кровососущие членистоногие являются переносчиками и значимыми природными резервуарами для размножения возбудителей вирусных, бактериальных и протозойных болезней человека и животных [2,4,8]. Например, таких возбудителей как вирусы семейств Reoviridae, Bunyaviridae, Poxviridae, Retroviridae и Asfarviridae, паразитирование которых на разных видах сельскохозяйственных животных неизбежно ведет к серьезным экономическим потерям из-за повышенной смертности в инфицированных стадах, производственных потерь и торговых ограничений [2,5,27,29,41].…”

Section: Introductionunclassified

“…Энзоотический лейкоз крупного рогатого скота (КРС) -хроническое злокачественное лимфопролиферативное заболевание вирусной этиологии, широко распространенное по всему миру [5,7]. Возбудитель -вирус лейкемии КРС (ВЛК, bovin leukemia virus, BLV) -представляет собой ретровирус из рода Deltaretrovirus семейства Retroviridae; он является близким родственником вируса Т-клеточного лейкоза человека 1 и 2 типов (HTLV-1 и 2) [31].…”

Section: Introductionunclassified

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Detection of genetic material of causative agents of animal viral diseases in blood-sucking dipterans from the Tyumen Region

Krutko

Kinareikina

Serkova

et al. 2023

Ross. parazitol. ž..

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The purpose of the research is to test blood-sucking dipterans collected in the Tyumen Region for genetic material of viruses that cause dangerous diseases in live-stock animals.Materials and methods. From May to October 2021, blood-sucking insects of the Diptera order whose species membership was established by tabular keys were collected on pastures and farms in ten Tyumen Region districts. In 60 samples formed from the captured insects according to the taxonomic affiliation and the period and place of collection, the presence of genetic material of the leukemia provirus and the dermatitis nodularis virus of cattle (bovine) and the African swine fever virus was evaluated by polymerase chain reaction (PCR) in real time.Results and discussion. Adult insects collected for the PCR analysis were blood-sucking flies (family Muscidae, genus Stomoxys), mosquitoes (family Culicidae, genus Aedes), midges (family Simuliidae, genera Byssodon and Schoenbaueria), horseflies (family Tabanidae, genera Hybomitra, Tabanus and Haematopota), and biting midges (family Ceratopogonidae, genus Culicoides). As a result of the PCR testing of the samples for the bovine leukemia provirus DNA, 1 out of 13 samples of Stomoxys spp. (7.7%) and 1 of 13 samples of Hybomitra spp. (7.7%) were positive. The bovine leukemia provirus DNA detected in blood-sucking insects indicates the presence of this pathogen in the insect collection area as well as their possible involvement in its spread. Further research is needed on the Stomoxys spp. and Hybomitra spp. vector competence in vivo, considering natural and climatic features of the Tyumen Region.

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Section: Introductionunclassified

Detection of genetic material of causative agents of animal viral diseases in blood-sucking dipterans from the Tyumen Region

Krutko

Kinareikina

Serkova

et al. 2023

Ross. parazitol. ž..

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“…Данное заболевание является опухолевым и имеет инфекционную природу. Кроме того, лейкоз крупного рогатого скота (ЛКРС) имеет повсеместное распространение практически во всех странах мира (Donnik et al, 2021). Возбудителем ЛКРС выступает вирус бычьего лейкоза (BLV), который имеет филогенетическую связь с вирусом Т-клеточного лейкоза человека 1-го типа (HTLV-1).…”

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Identification of Bovine Leukemia Virus (BLV) in Milk: Scoping review

Lazareva,

Fomenko

2023

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Introduction: Since 2019, there has been a growing interest in assessing the potential risks of animal viral infections mutating into a form dangerous for humans. Research in the field of livestock product safety is being conducted in several directions, including the analysis and assessment of the impact of the most common cattle diseases on the quality and safety of the raw materials obtained. Of particular interest is the identification of Bovine Leukemia Virus (BLV) in milk. Monitoring this virus will not only allow for the timely tracking of its presence in farmsteads, but also to evaluate the quality and safety of raw milk used for further dairy product production.Purpose: To analyze the main research directions in the field of molecular-genetic approach to the detection of bovine leukemia virus in cow's milk.Materials and Methods: This scoping review was carried out according to the protocol PRISMA-ScR. The articles were selected from the SCOPUS and ScienceDirect databases. The main criterion for including a publication in the review was the presence of information about the detection of BLV in milk by PCR method. Acceptance criteria also included document language (English), its type and status (published, peer-reviewed, review, and empirical articles) with no limitations on years.Results: In total, 3688 documents were extracted, among which a screening for duplicates was carried out, resulting in the extraction of 2905 search results for further analysis. At the stage of selecting publications by title and abstract, 2601 articles that did not match the context of the subject field review and the type of publication were excluded. Upon studying the full text of 38 articles, 23 were excluded. As a result of the analysis of the selected sources, 15 publications were included in the review. The studies analyzed were based both on simple and multi-stage methods of BLV identification. The source of biomaterial were blood, colostrum, raw milk, and meat from different animal samples.Conclusion: This scoping review is the first to summarize molecular-genetic approaches to the detection of BLV in milk. The presented results indicate the presence of a scientific base of methods for identifying BLV for further development of methods for controlling the presence of the virus and its proviral load in products, tightening control over the spread of economically harmful infectious diseases, potentially directly or indirectly dangerous for any consumer of dairy products.

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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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Bovine leukemia virus INFECTION — DIAGNOSTICS, ERADICATION, AND ANTHROPOZOONOTIC POTENTIAL (BACKGROUND) (review)

Cited by 10 publications

References 0 publications

Detection of genetic material of causative agents of animal viral diseases in blood-sucking dipterans from the Tyumen Region

Detection of genetic material of causative agents of animal viral diseases in blood-sucking dipterans from the Tyumen Region

Identification of Bovine Leukemia Virus (BLV) in Milk: Scoping review

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

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