[1] Brazilian Minist Hlth, Evandro Chagas Inst, Dept Arbovirol & Hemorrhag Fevers, Ananindeua, Para, Brazil
[2] Univ Para State, Dept Pathol, Belem, Para, Brazil
[3] Colorado State Univ, Coll Vet Med & Biomed Sci, Dept Microbiol Immunol & Pathol, Arthropod Borne & Infect Dis Lab, 3195 Rampart Rd,Delivery Code 1690, Ft Collins, CO 80523 USA