ANTIBODIES TO WEST NILE VIRUS IN ASYMPTOMATIC MAMMALS, BIRDS, AND REPTILES IN THE YUCATAN PENINSULA OF MEXICO

JOSÉ A. FARFÁN-ALE Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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BRADLEY J. BLITVICH Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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NICOLE L. MARLENEE Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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MARÍA A. LOROÑO-PINO Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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FERNANDO PUERTO-MANZANO Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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JULIÁN E. GARCÍA-REJÓN Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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ELSY P. ROSADO-PAREDES Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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LUIS F. FLORES-FLORES Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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ANDRES ORTEGA-SALAZAR Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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JAIDY CHÁVEZ-MEDINA Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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JUAN C. CREMIEUX-GRIMALDI Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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FAVIÁN CORREA-MORALES Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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GERSON HERNÁNDEZ-GAONA Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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JORGE F. MÉNDEZ-GALVÁN Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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BARRY J. BEATY Laboratorio de Arbovirologia, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida, Yucatan, Mexico; Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado; Centro Nacional de Vigilancia Epidemiológica y Control de Enfermedades, Secretaría de Salud, Distrito Federal, Mexico City, Mexico

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Surveillance for evidence of West Nile virus (WNV) infection in taxonomically diverse vertebrates was conducted in the Yucatan Peninsula of Mexico in 2003 and 2004. Sera from 144 horses on Cozumel Island, Quintana Roo State, 415 vertebrates (257 birds, 52 mammals, and 106 reptiles) belonging to 61 species from the Merida Zoo, Yucatan State, and 7 farmed crocodiles in Ciudad del Carmen, Campeche State were assayed for antibodies to flaviviruses. Ninety (62%) horses on Cozumel Island had epitope-blocking enzyme-linked immunosorbent assay (ELISA) antibodies to flaviviruses, of which 75 (52%) were seropositive for WNV by plaque reduction neutralization test (PRNT). Blocking ELISA antibodies to flaviviruses also were detected in 13 (3%) animals in the Merida Zoo, including 7 birds and 2 mammals (a jaguar and coyote) seropositive for WNV by PRNT. Six (86%) crocodiles in Campeche State had PRNT-confirmed WNV infections. All animals were healthy at the time of serum collections and none had a history of WNV-like illness.

Author Notes

Reprint requests: Barry J. Beaty, Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523.
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