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Методологические особенности культивирования и выявления вирусов лейкоза птиц RAV-1 и RAV-2

выпускная квалификационная работа магистра

Методологические особенности культивирования и выявления вирусов лейкоза птиц RAV-1 и RAV-2

Abstract

Данная работа посвящена подбору оптимальных условий и системы культивирования вирусов лейкоза птиц RAV-1 и RAV-2 и методам выявления вирусов лейкоза птиц. Методом ИФА был выявлен общий антиген ВЛП p27 в сыворотках кур пород Русская белая и Амрокс с частотой: 0,43 и 0,54 (соответственно). Антиген p27 также был выявлен в полупродуктах гриппозных вакцин. Высокая частота выявления ВЛП подчёркивает важность разработки стандартизованного способа инактивации вирусов гриппа одновременно с контаминантами при производстве гриппозных вакцин. Для экспериментов по контролю инактивации ВЛП стандартными инактивирующими агентами необходимы отработанные методы их культивирования и выявления. В рамках настоящей работы исследовались следующие параметры культивирования RAV-1 и RAV-2: система культивирования, пассаж вируса, длительность культивирования, число замораживаний/оттаиваний. Оптимальными условиями культивирования RAV-1 и RAV-2 являлись использование первичной культуры клеток фибробластов эмбрионов кур (ФЭК) с использованием питательной среды 199, заражение клеток 3-м или 2-м пассажем, культивирование в течение 12 или 7 суток соответственно и двукратное замораживание/оттаивание проб. В ходе отработки метода бляшкообразования для вируса RAV-1 было показано отсутствие цитопатического действия и формирования бляшек. Титр вируса определяли титрованием на ФЭК с последующей постановкой вируссодержащей культуральной жидкости в ИФА. Был получен концентрат RAV-1 с титром не менее 8lg. Результаты настоящей работы позволят проводить накопление ВЛП для дальнейшей отработки способов и условий его инактивации.

The given work is devoted to the selection of optimal conditions and systems of avian leukosis viruses RAV-1 and RAV-2 cultivation and detection methods. By ELISA method, the total ALV p27 antigen was detected in the sera of Russian White and Amrox chicken breeds with frequencies: 0.43 and 0.54 (respectively). The p27 antigen was also detected in the influenza vaccine intermediates. The high frequency of ALV detection emphasizes the importance of developing a standardized method of inactivation of influenza viruses simultaneously with contaminants during production of influenza vaccines. Experiments to control ALV inactivation with standard inactivating agents require well-established methods for cultivation and detection of ALV. The following cultivation parameters of RAV-1 and RAV-2 were investigated in this work: cultivation system, passage of the virus, duration of cultivation, number of freezing/thawing. Optimal cultivation conditions for RAV-1 and RAV-2 were the use of primary culture of chicken embryo fibroblast (CEF) using nutrient medium 199, infection of cells with the 3rd or the 2nd passages, cultivating for 12 or 7 days, respectively, and freezing/thawing samples for 2 times. The absence of cytopathic effect and plaque formation was demonstrated during the plaque-forming methods for RAV-1 virus. The virus titer was determined by titration in CEF followed by ELISA for p27 detection in viral-containing cultural liquid. A RAV-1 concentrate with a titer of at least 8lg was obtained. The results of this work will allow to accumulate ALV for further development of methods and conditions of its inactivation.

Keywords

вирус лейкоза птиц (ВЛП), культивирование ВЛП, avian leukosis virus (ALV), cultivation of ALV, общий антиген p27, total antigen p27, Вирусология

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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