Soil contamination and human infection by toxocara sp. in the urban area of Lima, Peru - Lescano, Susana Angelica Zevallos; Chieffi, Pedro Paulo; Peres, Benedito Anselmo; Mello, Elisabete Ourique de; Velarde, César Náquira; Salinas, Adan Apaza; Rojas, Carmen Estácio (Memórias do Instituto Oswaldo Cruz, 1998)