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Therefore effective method for vaccine production using simple and inexpensive bioprocessing solutions is very essential. Conventional culture systems currently in use, tend to be uneconomic in terms of labor and time involved. Besides, they offer a limited surface area for growth of cells. In this study, the CelCradle\u2122-500A was evaluated as an alternative to replace conventional culture systems in use such as Cell factories for the production of viral vaccines against small ruminant morbillivirus (PPR), rift valley fever virus (RVF) and lumpy skin disease virus (LSD).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Two types of cells Vero and primary Lamb Testis cells were used to produce these viruses. The study was done in 2 phases as a) optimization of cell growth and b) virus cultivation. Vero cells could be grown to significantly higher cell densities of 3.04\u2009\u00d7\u200910<jats:sup>9<\/jats:sup> using the CelCradle\u2122-500A with a shorter doubling time as compared to 9.45\u2009\u00d7\u200910<jats:sup>8<\/jats:sup> cells in Cell factories. This represents a 19 fold increase in cell numbers as compared to seeding vs only 3.7 fold in Cell factories. LT cells achieved modestly higher cell densities of 6.7\u2009\u00d7\u200910<jats:sup>8<\/jats:sup> as compared to 6.3\u2009\u00d7\u200910<jats:sup>8<\/jats:sup> in Cell factories. The fold change in densities for these cells was 3 fold in the CelCradle\u2122-500A vs 2.5 fold in Cell factories. The titers in the conventional system and the bioreactor were not significantly different. However, the Cell-specific virus yield for rift valley fever virus and lumpy skin disease virus are higher (25 virions\/cell for rift valley fever virus, and 21.9 virions\/cell for lumpy skin disease virus versus 19.9 virions\/cell for rift valley fever virus and 10 virions\/cell for lumpy skin disease virus).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>This work represents a novel study for primary lamb testis cell culture in CellCradle\u2122-500A bioreactors. In addition, on account of the high cell densities obtained and the linear scalability the titers could be further optimized using other culture process such us perfusion.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12917-021-02801-4","type":"journal-article","created":{"date-parts":[[2021,2,27]],"date-time":"2021-02-27T12:02:56Z","timestamp":1614427376000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Production of small ruminant morbillivirus, rift valley fever virus and lumpy skin disease virus in CelCradle\u2122 -500A bioreactors"],"prefix":"10.1186","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7561-2429","authenticated-orcid":false,"given":"Halima","family":"Rhazi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Najete","family":"Safini","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karima","family":"Mikou","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meryeme","family":"Alhyane","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Khalid Omari","family":"Tadlaoui","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiangliang","family":"Lin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nandini P.","family":"Venkatesan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mehdi","family":"Elharrak","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,2,27]]},"reference":[{"issue":"2","key":"2801_CR1","doi-asserted-by":"publisher","first-page":"179","DOI":"10.1016\/0168-1656(94)90009-4","volume":"37","author":"S Ala-Uotila","year":"1994","unstructured":"Ala-Uotila S, Marjam\u00e4ki A, Matikainen MT, Jalkanen M. 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