Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

Volume 17, Number 12—December 2011

Research

West Nile Virus Infection of Birds, Mexico

Sergio Guerrero-Sánchez1, Sandra Cuevas-Romero, Nicole M. Nemeth, Maríaresa Jesús Trujillo-Olivera, Gabriella Worwa, Alan Dupuis, Aaron C. Brault, Laura D. Kramer, Nicholas Komar, and José Guillermo Estrada-FrancoComments to Author 
Author affiliations: Zoológico Miguel Alvarez del Toro, Tuxtla Gutiérrez, Mexico (S. Guerrero-Sánchez); Instituto Nacional de Investigaciones Forestales, Mexico City, Mexico (S. Cuevas-Romero); Centers for Disease Control and Prevention, Fort Collins, Colorado, USA (N.M. Nemeth, A.C. Brault, N. Komar); Universidad Autónoma de Chiapas, Tuxtla Gutiérrez (M.T. Jesus Trujillo-Olivera); University of California, Davis, California, USA (G. Worwa); New York State Department of Health, Slingerlands, New York, USA (A Dupuis, L.D. Kramer); University of Texas Medical Branch, Galveston, Texas, USA (J.G. Estrada-Franco)

Main Article

Table 3

Tissue tropism and viral loads in birds that died after experimental inoculation with WNV, Mexico*

Species† WNV strain dpi Viral load by tissue type, PFU/0.5 cm3
Brain Heart Spleen Kidney Lung Liver Pancreas Intestine Skin
House sparrow Tecate 4 8.0 7.6 NR NR 9.3 8.1 4.9 <0.7 7.6
Tecate 5 8.2 7.7 7.6 7.2 9.2 8.0 5.2 3.1 8.0
Tabasco 6 2.3 2.9 NR 3.6 4.5 5.7 <0.7 <0.7 4.9
Tabasco 7 <0.7 <0.7 <0.7 1.3 1.9 <0.7 <0.7 <0.7 <0.7
Tabasco 7 3.1 7.7 4.8 5.9 5.2 5.2 <0.7 NR NR
Great-tailed grackle Tecate 4 7.4 8.2 7.5 8.8 9.3 7.6 6.7 <0.7 8.0
Tecate 12 3.4 5.1 5.5 5.9 5.2 5.8 6.0 3.0 4.9
Tabasco 3 NR 8.1 3.8 8.6 8.5 7.9 <0.7 NR NR
Tabasco 4 8.1 7.7 6.6 7.9 NR 7.4 4.7 2.7 7.8

*WNV, West Nile virus; dpi, days postinoculation; NR, not reported because of insufficient sample collection.
†Deaths occurred in sparrows and grackles but not thrushes and chickens; thrushes and chickens were euthanized on 21 and 7 dpi, respectively, and tissues from these birds were negative for infectious WNV with the exception of 1 chicken-derived skin sample (102.0 PFU/0.5 cm3).

Main Article

1Current affiliation: El Colegio de la Frontera Sur, Campeche, Mexico.

TOP