1. Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Ministério da Saúde, Salvador, Bahia, Brazil.
2. Division of Epidemiology of Microbial Diseases, School of Public Health, Yale University, New Haven, Connecticut.
3. Centro de Controle de Zoonoses, Secretaria Municipal de Saúde, Ministério da Saúde, Salvador, Bahia, Brazil.
4. Embrapa Amazônia Orienta, Belém, Pará, Brazil.
5. DVBID, Centers for Disease Control and Prevention, Fort Collins, Colorado.
6. Department of Epidemiology and Public Health and Center for Eco-Epidemiology, Yale University School of Medicine, New Haven, Connecticut.