Attraction of Schistosoma Mansoni Sambon, 1907 Miracidia to Biomphalaria Glabrata (Say, 1818) in the Presence of Angiostrongylus Costaricensis Morera and Cespedes, 1971 Infection/Atracao de Miracidios de Schistosoma Mansoni Sambon, 1907 Por Biomphalaria Glabrata (Say, 1818) Infectada Por Angiostrongylus Costaricensis Morera and Cespedes, 1971 (Report‪)‬

1. Introduction Human infection by the nematode Angiostrongylus costaricensis (Morera and Cespedes, 1971), is known as abdominal angiostrongiliasis. Human infection is considered accidental, and wild rodents serve as definitive hosts. This disease was first identified in Central America (Tesh et al., 1973), from Sigmodon hispidus Say and Ord, 1835 (Rodentia: Cricethidae), and later from Orizomys nigripes Olfers, 1818 and Orizomys ratticeps Hensel, 1873 in southern Brazil (Graeff-Teixeira et al., 1990). The usual intermediate hosts are terrestrial mollusks of the family Veronicellidae (slugs), specially species of the genera Sarasinula (Laitano et al., 2001), and Phyllocaulis (Graeff-Teixeira et al., 1989a), as well as the species Limax maximus Linnaeus, 1758, L. flavus Linnaeus, 1758 and also Bradybaena similaris Ferrussac, 1821, Belocaulus angustipes Heyneman, 1885 (Graeff-Teixeira et al., 1993), Helix aspersa Muller, 1774 (Thiengo et al., 1993) and Deroceras laeve (Muller, 1774) (Maurer et al., 2002). In the laboratory, several species of mollusks such as Biomphalaria glabrata, B. tenagophila (d'Orbigny, 1835), B. straminea (Dunker, 1848), Megalobulimus sp. and Achatina fulica Bodwdich, 1822 were found to be susceptible to A. costaricensis (Graeff-Teixeira et al., 1989b; Monge et al., 1978; Lima et al., 1992; Carvalho et al., 2003).