[Current view on Blastocystis species: clinical forms, diagnosis and treatment].

The symptomatic form of Blastocystis spp. infection not only with mild diarrhea or dysentery-like syndrome, but also with the development of severe ulcerative necrotic lesions of the intestine. Meanwhile, the pathogenicity of these microorganisms should not be exaggerated, due to majority asymptomatic cases or infection transmission with minor impaired bowel function.

[(EXPERIENCE WITH GEOGRAPHIC INFORRMATION SYSTEMS USED IN EPIDEMIOLOGICAL STUDIES (AS AN EXAMPLE OF MALARIA AND DIROFILARIASIS)].

The effective application of GIS against parasitic diseases requires the patterns of spread of parasitic diseases in certain natural, climatic, and socioeconomic conditions of different regions where there are epidemically effective carriers. The epidemiological parameters defining a high risk of an epidemiological process after P.vivax importation into Russia were calculated using the developed HealthMapper controlled module with a database. Analysis of the average long-term air temperatures in the administrative territories of Russia over 78 years, namely July, the warmest month of the year when there are the largest numbers of all types of mosquito vectors and high levels of microfilaria in the peripheral blood of in- fected dogs (definitive hosts), has shown that the northern border of the maximum possible area of dirofilariasis in Russia is most fully described by the +14C July isotherm.

[The 15 years' experience of diagnostic of human dirofilariasis.]

The article presents the results of studies of the clinical diagnostic laboratory of the E.I. Martcinovskii institute of medical parasitology, tropical and transmissive diseases related to diagnostic of human dirofilariasis brought in by Dirofilaria repens. During last 15 years, 165 cases were diagnosed. The most of dirofilaria (89.7%) migrated and localized superficially under skin or mucous membrane: on the head in 88 cases and out of them 43.6% in the area of eye-socket, in 25 cases on the body out of them 4 on genitalia, in 35 cases under skin of extremities. In 1 cases dirofilaria migrated to inner organs: 10 in lungs, 4 in pleura, 1 in small intestine, 1 in omentum. In case of pleuropulmonary localization the disease was taking its course under mask of tuberculoma malignant tumor, exudative pleurisy, neoplasm of obscure etiology.

[CLINICAL CASE OF DIROFILARIASIS.]

The paper describes a case of the rare localization of a pregnant Dirofilaria female in a man's genitalia. Patient T born in 1973 was infected in the Krasnoyarsk Territory presumably in the summer of 2012. A migratory mass appeared under the skin of the chest at the beginning of 2016. A dense mass was located beneath the skin in the penis by early April. Histological specimens from the removed tumor, entered the specialized Clinical Diagnostic Laboratory for parasitic diseases. The specimens exhibited transverse and oblique sections of Dirofilaria spp. The body cavity contained nematodes - multiple microfilariae. However, routine studies and PCR could not reveal the microfilariae in the blood.

[Comparative analysis of the incidence of toxocariasis in 2011-2012].

According to official statistics data, and the archives' data of the specialized clinical diagnostical laboratory for parasitic diseases of the Clinical Center of the I. M. Sechenov First Moscow State Medical University in 2011 and 2012, the incidence of toxocariasis in Russia remains to be high and stable, because of the inefficiency of performed preventive measures.