作者单位:Secretariat Hlth, Publ Hlth Reference Ctr, Adolfo Lutz Inst, Sao Paulo, Brazil[1]Ctr Toxins Immune Response & Cell Signaling, Butantan Inst, Sao Paulo, Brazil[2]Secretariat Hlth, Grad Program Coordinat Dis Control, Sao Paulo, Brazil[3]Univ Estadual Paulista Julio de Mesquita Neto, Sao Jose Do Rio Preto, SP, Brazil[4]