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Eosinophilic meningitis is caused by various parasites, a representive of which is Angiostrongylus cantonensis. The disease has also occasionally been reported in visceral larva migrans due to Toxocara canis, although the parenchymatous involvement of the CNS is extremely rare in T canis visceral larva migrans.1 Recently an outbreak of visceral larva migrans due to Ascaris suum infection has been reported in Kyushu, Japan, where chemical fertiliser has been replaced in part with pig manure.2 We report a case of myelopathy probably due to A suum infection.
A 22 year old man, living in the Tokyo metropolitan area, noticed that his right hand was swollen and warm in mid-August, 1999. The oedema subsided spontaneously within a week. In early October, he felt thermanaesthesia in his right leg while he was taking a shower. Because he had sometimes felt numbness in one or both axillas from the beginning of November, he was admitted to a hospital on 7 December 1999. Physical examination on admission showed hypalgesia and thermanaesthesia below the Th9 level on the right and a positive Lhermitte's sign. Peripheral blood eosinophil count was raised at 610/μl (10.5% leucocytes). Serum IgE concentration was 155 IU/ml (normal <240 IU/ml). Thoracic …