possible windborne spread of bluetongue to portugal, june-july 1956.the possible sources for the epidemic of bluetongue in portugal at the beginning of july 1956 were examined. introduction through authorized importation of domestic or wild ruminants was not feasible, since no cattle, sheep or goats were imported and the wild ruminants were confined to lisbon zoo, which was too far from the initial outbreaks. weather maps were examined to see if the wind could have carried infected culicoides midges from north africa. on 21 june 1956 infected midges in morocco c ...1978212475
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