BRVs in Venezuela was also observed, as in other
parts of the world (Bellinzoni et al., 1989:; Hussein
et al., 1993), but its epidemiological importance
remains to be established. None of the GlO
(probably associated with P[ 1 l] genotype) bovine
field isolates could be adapted to tissue culture,
confirming the difficulty in adapting them to cell
culture (Snodgrass et uZ., 1990).