“…It is the primary cause of VLM in humans (Sánchez et al 1994). Toxocarosis is a systemic larval parasitosis that may affect humans of different age or sex (Beaver 1956, Agudelo et al 1990, Gueglio et al 1994. It may appear in the following forms: (i) ocular larva migrans (OLM), always with serious lesions that can produce leukocoria, uveitis, retinal granulomas or chronic endophthalmitis, very often with a decrease of the visual acuity and strabismus (Beaver 1956, Villano et al 1992, Kujat et al 1993, Minvielle et al 1993, Sharkey & Mc Kay 1993; (ii) VLM associated with different clinical manifestations: hepatitis (Minvielle et al 1993), diffuse pulmonary involvement (Hotez 1993), severe asthma (Glickman & Magnaval 1993), severe eosinophilic pneumonia (Hirata et al 1990), cutaneous disorders (Kasacos & Boyce 1990, España et al 1993), myocardial (Kujat et al 1993) and gastroenteric affections (Jansen et al 1993) as well as those of the central nervous system (Beaver 1956, Khalil et al 1971, Woodruff 1975, Sellal et al 1992, Glickman & Magnaval 1993, Stenfancikova et al 1993, Kumar & Kimm 1994 usually accompanied by persistent eosinophilic increase ranging from moderate to severe; (iii) covert toxocarosis with nonspecific symptomatology: hepatomegaly, abdominal pain, sleep disturbances, headache (Agudelo et al 1990) and associated with normal or slightly increased eosinophilia.…”