Dr. Holló Ferenc szerk.: Parasitologia Hungarica 3. (Budapest, 1970)

while those of T.vitrinus are larger, measuring 98-104 by 4247 /*>). Eggs excreted in the faeces of infected animals develop to first stage (rhabditiform) larvae within 12-24 hours given favourable conditions of temperature and moisture on the soil. The larvae hatch from the eggs and, after two moults, reach the third, infective larval stage within a week. Man is infected by the ingestion of these third stage, (filariform) larvae which have contaminated food, vegetables, grass, etc. Trichostrongylosis in this country is usually a mild, subclinical infection, as indicated by the fact that recognized cases have been detected only as a result of screening. However, heavier infection may result in symptoms: in adults emaciation, pains in the abdomen (tenderness, diarrhoea), slight anaemia and eosinophilia are seen, and in children there is also retardation of development. Our present cases seemed worth recording as, in view of widespread Tricho

strongyliïs infection in ruminants, it has been suggested that trichostrongylosis may be a factor involved more frequently than so far assumed in diseases of unknown aetiology in rural inhabitants. Case History L.Sz., born on July 15th,

1962, was admitted to the Peadiatric Department of Nagykőrös Council Hospital on July 8th, 1969, under No. 2655/69. The child was born at term weighing 2000 gm. As a baby he had been treated for severe bronchopneumonia, and was re-admitted to the hospital for the same complaint at the age of 18 months. He was physically backward at that time (body weight: 7,7 kg, body length: 75 cm). According to the history the boy