The Crimean-Congo haemorrhagic fever virus (CCHFV) is a 3-segmented RNA virus, which causes disease with a high fatality rate in humans. An inactivated suckling mouse brain-derived vaccine is used in Bulgaria for protection against CCHF. Strain V42/81 is currently used for the vaccine preparation. As the M-RNA segment plays a major role in the immune response, the full-length M segment sequence of the V42/81 strain was characterized. A great genetic diversity was observed among CCHFV strains. In order to gain an insight into the topology of the strain in the CCHFV phylogenetic trees, the full-length S and partial L segments were additionally sequenced and analyzed.
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Papa et al. (2010) studied this question.
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