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

Volume 9, Number 2—February 2003


Equine Amplification and Virulence of Subtype IE Venezuelan Equine Encephalitis Viruses Isolated during the 1993 and 1996 Mexican Epizootics

Dante Gonzalez*, José G. Estrada-Franco†, Anne-Sophie Carrara†, Judith F. Aronson†, and Nikos Vasilakis†Comments to Author 
Author affiliations: *Instituto Nacional de Investigaciones Forestales, Agricolas y Pecuarias, Mexico City, Mexico; †University of Texas Medical Branch, Galveston, Texas, USA

Main Article

Table 2

Outcome for horses experimentally infected with Venezuelan equine encephalitis virus strains

no. Gender Virus strain Maximum temperature (°C) Maximum viremia levela Clinical outcome Histopathologic findings
1 Male OAX131 40.3 2.8 No disease Perivascular cuffing, minimal encephalitis
2 Male OAX131 40.2 1.4 No disease Perivascular cuffing, minimal encephalitis
3 Male OAX131 39.1 1.4 No disease Perivascular cuffing, minimal encephalitis
4 Male CPA201 40.8 2.4 Fatal encephalitis Perivascular cuffing, lymphocytic meningitis, focal encephalitis
5 Male CPA201 38.4 1.4 No disease Normal
6 Female CPA201 37.7 <0.6 No disease Normal
7 Male OAX142 38.2 <0.6 No disease Normal
8 Female OAX142 38.9 <0.6 No disease Normal
9 Male I-290–93 38.6 <0.6 No disease Normal
10 Male I-290–93 39.8 <0.6 No disease Normal

aTiters expressed as log10 suckling mouse intracerebral lethal dose50/mL serum.

Main Article