[1] Univ Peruana Cayetano Heredia, Dept Microbiol, Lima, Peru
[2] Inst Nacl Ciencias Neurol, Cysticercosis Unit, Lima, Peru
[3] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Int Hlth, Baltimore, MD USA
[4] Hosp Clin Kennedy, Dept Neurol Sci, Guayaquil, Ecuador
[5] NIAID, Parasit Dis Lab, Gastrointestinal Parasites Sect, NIH, Bethesda, MD USA
[6] Baylor Coll Med, Dept Med, Infect Dis Sect, Houston, TX USA
[7] Ben Taub Gen Hosp, Houston, TX 77030 USA
[8] Natl Ctr Infect Dis, Div Parasit Dis, Immunol Branch, Ctr Dis Control, Atlanta, GA USA