West Nile virus activity in mosquitoes and domestic animals in Chiapas, México.
Prior to 2006, West Nile virus (WNV) had not been definitively detected in Chiapas, the southernmost state of Mexico, although it circulates elsewhere in Mexico and Central America. We collected over 30,000 mosquitoes and blood-sampled 351 domestic animals in Chiapas in search for evidence of current or recent transmission of WNV. Two mosquito pools tested positive for WNV RNA and 17 domestic animals tested positive for specific WNV-neutralizing antibodies, including young animals (<1 year old) in four of five sampled locations. The two WNV-positive mosquito pools were collected on the Pacific coastal plain of Chiapas in June, 2006, and included a pool of Culex nigripalpus, a suspected vector of WNV, and a pool of Cx. interrogator. The sequence of a 537-nucleotide portion of a cDNA amplicon derived from the WNV NS5 gene from the Cx. interrogator pool contained a single silent nucleotide substitution when compared to WNV strain NY99.
Ulloa
Armando
A
Centro Regional de Investigación en Salud Pública, Tapachula, Chiapas, México. aulloa@insp.mx
Ferguson
Heidy Hann
HH
Méndez-Sánchez
José D
JD
Danis-Lozano
Rogelio
R
Casas-Martínez
Mauricio
M
Bond
J Guillermo
JG
García-Zebadúa
Julio C
JC
Orozco-Bonilla
Arnoldo
A
Juárez-Ordaz
José A
JA
Farfan-Ale
José A
JA
García-Rejón
Julian E
JE
Rosado-Paredes
Elsy P
EP
Edwards
Eric
E
Komar
Nicholas
N
Hassan
Hassan K
HK
Unnasch
Thomas R
TR
Rodríguez-Pérez
Mario A
MA
D000820:Animal Diseases / Q000097:blood / Q000453:epidemiology* / Q000821:virology; D000818:Animals; D000829:Animals, Domestic / Q000097:blood*; D000914:Antibodies, Viral; D002417:Cattle; D009033:Culicidae / Q000821:virology*; D005260:Female; D006736:Horses; D008800:Mexico / Q000453:epidemiology; D011200:Poultry; D013552:Swine; D014901:West Nile Fever / Q000097:blood / Q000453:epidemiology / Q000662:veterinary*; D014902:West Nile virus / Q000302:isolation & purification*
D000914:Antibodies, Viral