[Observations on the intradermal reaction to Strongyloides ratti antigen in strongyloidosis patients].
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Animal models (rat, mouse, dog and monkey) being used in comparative investigations on immunobiology, pathology, clinical manifestations and treatment ot human atrongyloidosis were presented.
The effectiveness and safety of the methods of detecting Strongyloides stercoralis, by passing larvae from the faeces to water, in duodenal fluid (duodenal intubation, Enterotest), in sputum and other body fluids, have been estimated. The author recommend Baermann technique for detecting S. stercoralis in individual examinations and Dancescu technique in mass field examinations. The detection of S. stercoralis larvae by the two methods ought to be checked by Fülleborn agar Petri dish technique in order to identify parasite to the species level.
A case of Strongyloides stercoralis infection was described.
From May 1988 to September 1990 the microbiology laboratory of the Ivrea-Castellamonte Hospital (Province of Turin) carried out 1464 coproparasitological investigations. 0.5% of the samples, coming from 5 patients, proved to be Strongyloides stercoralis positive. 4 cases were diagnosed in recovery conditions, and on these we carried out a retrospective study (taking into consideration some epidemiological and clinical aspects). The average age of these patients, three men and one woman, was 70.5; all native of the Canavese and resident in agricultural zones; two farmers still working, a worker and a retired worker. All of them presented one or more associated pathologies and/or a tendency to parasitosis. The clinical picture was characterized by abdominal pain, present in three cases, while diarrhoea was observed in only one case; a slight temperature in two, a high temperature in one; nettle-rash manifestations in one case and breathing symptomatology in two. In two cases there appeared abdominal relaxation (meteorism) and in one of these there was a serious paralytic ileus. Eosinophilia was present in all the patients, even if at different levels (from 5.9% to 20%). The treatment was carried out with different drugs: mebendazole in two cases, thiabendazole in one and "pyrvinium pamoate" in another. Our conclusion is that there exist in the Canavese the climatic, environmental and social-economical conditions which can favour Strongyloidiasis.