Shittu I, Adedeji AJ, Luka PD, Asala OO, Sati NM, Nwagbo IO, Chinyere CN, Arowolo OO, Adole JA, Emennaa P, Abdu PA, Joannis TM. Avian leukosis virus subgroup - J as a contaminant in live commercially available poultry vaccines distributed in Nigeria.
Biologicals 2018;
57:29-33. [PMID:
30454953 DOI:
10.1016/j.biologicals.2018.11.003]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 10/12/2018] [Accepted: 11/11/2018] [Indexed: 11/18/2022] Open
Abstract
Globally, vaccines are used to prevent and control the menace of infectious diseases in livestock with some reported to be inadvertently contaminated with extraneous agents (EAs). With the aim of screening and characterizing for some selected EAs, 44 live viral poultry vaccines were randomly selected based on availability. The vaccines comprised 14 manufacturers in 10 different countries including Nigeria were screened by Polymerase Chain Reaction. In 9% (4/44) of the vaccines, contamination with only avian leukosis virus (ALV) subgroup J (ALV-J) was recorded. Other exogenous ALV subgroups, chicken infectious anemia and infectious laryngotracheitis viruses were absent. The EAs was found in infectious bursal disease (n = 1), Fowlpox (n = 2) and Mareks disease (n = 1) vaccines. Phylogenetic analysis of the ALV-J env gene showed clustering with contemporary group I and II. The result underscores the importance of screening vaccines to avoid the introduction and spread of EAs that could pose a threat to poultry production.
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