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bluetongue epidemiology in the caribbean region: serological and entomological evidence from a pilot study in barbados.variation in the percentage of lambs seroconverting to bluetongue viruses was seen between sites and years in barbados. transmission at some sites was nearly absent whereas all lambs at one site became seropositive. the agar gel immunodiffusion test for bluetongue gave consistent results in series of serum samples from 112 of 121 sentinel lambs. collections of biting midges in association with sheep yielded six species: culicoides insignis lutz, c. pusillus lutz, c. phlebotomus (williston), c. f ...19901966778
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