Epidemiologic study of bluetongue viruses in Central America and the Caribbean: 1986-1988

E. Jane Homan From the Unversity of Wisconsin-Madison, School of Veterinary Medicine, 2015 Linden Drive, Madison WI 53706 (Homan, Mo), the USDA Agricultural Research Service Arthropod-borne Animal Disease Research Laboratory, PO Box 3965, Laramie WY 82071 (Thompson), the Organismo Internacional Regional de Sanidad Agropecuaria, Apartado 01-61, San Salvador, El Salvador (Barreto), Proyecto Lengua Azul, Apartado 1518, Heredia 3000, Costa Rica (Oviedo), and the College of Veterinary Medicine, University of Florida, Gainesville, FL 32610 (Gibbs, Greiner)

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Claudette L. Mo From the Unversity of Wisconsin-Madison, School of Veterinary Medicine, 2015 Linden Drive, Madison WI 53706 (Homan, Mo), the USDA Agricultural Research Service Arthropod-borne Animal Disease Research Laboratory, PO Box 3965, Laramie WY 82071 (Thompson), the Organismo Internacional Regional de Sanidad Agropecuaria, Apartado 01-61, San Salvador, El Salvador (Barreto), Proyecto Lengua Azul, Apartado 1518, Heredia 3000, Costa Rica (Oviedo), and the College of Veterinary Medicine, University of Florida, Gainesville, FL 32610 (Gibbs, Greiner)

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Lee H. Thompson From the Unversity of Wisconsin-Madison, School of Veterinary Medicine, 2015 Linden Drive, Madison WI 53706 (Homan, Mo), the USDA Agricultural Research Service Arthropod-borne Animal Disease Research Laboratory, PO Box 3965, Laramie WY 82071 (Thompson), the Organismo Internacional Regional de Sanidad Agropecuaria, Apartado 01-61, San Salvador, El Salvador (Barreto), Proyecto Lengua Azul, Apartado 1518, Heredia 3000, Costa Rica (Oviedo), and the College of Veterinary Medicine, University of Florida, Gainesville, FL 32610 (Gibbs, Greiner)

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Celio H. Barreto From the Unversity of Wisconsin-Madison, School of Veterinary Medicine, 2015 Linden Drive, Madison WI 53706 (Homan, Mo), the USDA Agricultural Research Service Arthropod-borne Animal Disease Research Laboratory, PO Box 3965, Laramie WY 82071 (Thompson), the Organismo Internacional Regional de Sanidad Agropecuaria, Apartado 01-61, San Salvador, El Salvador (Barreto), Proyecto Lengua Azul, Apartado 1518, Heredia 3000, Costa Rica (Oviedo), and the College of Veterinary Medicine, University of Florida, Gainesville, FL 32610 (Gibbs, Greiner)

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Marco-Tulio Oviedo From the Unversity of Wisconsin-Madison, School of Veterinary Medicine, 2015 Linden Drive, Madison WI 53706 (Homan, Mo), the USDA Agricultural Research Service Arthropod-borne Animal Disease Research Laboratory, PO Box 3965, Laramie WY 82071 (Thompson), the Organismo Internacional Regional de Sanidad Agropecuaria, Apartado 01-61, San Salvador, El Salvador (Barreto), Proyecto Lengua Azul, Apartado 1518, Heredia 3000, Costa Rica (Oviedo), and the College of Veterinary Medicine, University of Florida, Gainesville, FL 32610 (Gibbs, Greiner)

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E. Paul J. Gibbs From the Unversity of Wisconsin-Madison, School of Veterinary Medicine, 2015 Linden Drive, Madison WI 53706 (Homan, Mo), the USDA Agricultural Research Service Arthropod-borne Animal Disease Research Laboratory, PO Box 3965, Laramie WY 82071 (Thompson), the Organismo Internacional Regional de Sanidad Agropecuaria, Apartado 01-61, San Salvador, El Salvador (Barreto), Proyecto Lengua Azul, Apartado 1518, Heredia 3000, Costa Rica (Oviedo), and the College of Veterinary Medicine, University of Florida, Gainesville, FL 32610 (Gibbs, Greiner)

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Ellis C. Greiner From the Unversity of Wisconsin-Madison, School of Veterinary Medicine, 2015 Linden Drive, Madison WI 53706 (Homan, Mo), the USDA Agricultural Research Service Arthropod-borne Animal Disease Research Laboratory, PO Box 3965, Laramie WY 82071 (Thompson), the Organismo Internacional Regional de Sanidad Agropecuaria, Apartado 01-61, San Salvador, El Salvador (Barreto), Proyecto Lengua Azul, Apartado 1518, Heredia 3000, Costa Rica (Oviedo), and the College of Veterinary Medicine, University of Florida, Gainesville, FL 32610 (Gibbs, Greiner)

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and the Regional Bluetongue Team
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and the Regional Bluetongue Team

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SUMMARY

Results of a prospective serologic and virologic study of ruminant livestock in Central America and the Caribbean islands revealed bluetongue virus (btv) to be enzootic in the 9 countries participating in the study. Bluetongue virus serotypes 1, 3, 6, and 12 were isolated from sentinel animals. To the authors’ knowledge, these are the first isolations of btv from the region studied and the first isolations of these serotypes in the Western Hemisphere. Clinical disease attributable to btv infection was not observed in sentinel animals. The incidence pattern, with respect to age and geographic location, was determined. The need to evaluate the epizootiologic features of arthropod-borne viruses (arboviruses) on a regional ecologic basis is stressed.

SUMMARY

Results of a prospective serologic and virologic study of ruminant livestock in Central America and the Caribbean islands revealed bluetongue virus (btv) to be enzootic in the 9 countries participating in the study. Bluetongue virus serotypes 1, 3, 6, and 12 were isolated from sentinel animals. To the authors’ knowledge, these are the first isolations of btv from the region studied and the first isolations of these serotypes in the Western Hemisphere. Clinical disease attributable to btv infection was not observed in sentinel animals. The incidence pattern, with respect to age and geographic location, was determined. The need to evaluate the epizootiologic features of arthropod-borne viruses (arboviruses) on a regional ecologic basis is stressed.

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