[Intestinal parasites in secondary school students in the Martin District]. / Crevné parazity u ziakov stredných odborných skôl v okrese Martin.

The authors report on the prevalence of intestinal parasites in 1763 students of selected secondary schools in District Martin from 1988 to 1990 as continuation of parasitologic surveillance of pre-school children collectives and of elementary school pupils. The situation in occurrence of geohelminthiasis in the investigated group of students is considered to be very favorable and could reflect, in some degree, the parasitologic surveillance and treatment of positive cases in the seventies. The prevalence of intestinal protozoa, especially Giardia intestinalis, is in examined students only a little lower as the values given by our authors for population of children. This indicates a shift of epidemiologic importance from geohelminthiases towards the protozoal infections. (Tab. 5, Ref. 18).

[Sarcocystis species in Vietnamese workers]. / Sarcocystis species u vietnamských praktikantov.

The authors give an account of the finding of sporocysts of the Sarcocystis spp. in 14 Vietnamese apprentices from a total of 1228 examined (1.1%) who came to Central Slovakia in the course of 18 months in 1987-1989. The mean period of sporocyst excretion was 49.2 days. The positive subjects did not report gastrointestinal complaints despite mixed intestinal parasitoses. The subjects were from the north eastern part of the country from Hanoi-Haiphong areas and they did not report that they ate raw meat. The authors evaluate the diagnostic value of different coprological methods whereby they found the highest detection rate in faecal smears examined by Heine's method. The authors draw attention to the fact that the diagnosis of sporocysts of human coccidiae calls for personal diagnostic experience as they may escape attention or be mistaken for cysts of other intestinal protozoa.

[Incidence of e-antigen and antibodies against it in a selected group of HBsAg-positive Vietnamese citizens]. / Príspevok k výskytu e-antigénu a protilátok proti nemu vo vybranej skupine HBsAg pozitívnych Vietnamských obcanov.

In 23 citizens of the Vietnamese Socialist Republic on arrival in Czechoslovakia HBsAg positivity of serum was revealed which in 78.2% of subjects was confirmed during a repeated examination after 2-3 months. At that time also HBeAg and antibodies against it were assessed. HBeAg was found in 13.0% and anti-HBe in 47.8% of the subjects with repeatedly positive HBsAg, and anti-HBe in 21.8% of subjects, where HBsAg was negative during repeated examinations. The authors emphasize the importance of assessment of these markers of hepatitis B from the clinical and epidemiological aspect.

[Morphologic characteristics of the eggs of Ascaris lumbricoides in coprological findings in humans]. / Morfologické zvlástnosti vajícok Ascaris lumbricoides v koprologických nálezoch u ludí.

On microphotographs the morphological peculiarities of the eggs of Ascaris lumbricoides are demonstrated. Diagnostic problems caused by these anomalies are discussed. Study of the variations of this parasite can contribute to a better understanding of the morphology, ecology and biology of intestinal parasites.

Our experiences with the diagnosis of intestinal parasites in foreign apprentices from the tropics and subtropics.

The authors on an extensive coprologic material with high positivity of intestinal parasites compare the Hein's method of thick smear of stool with concentration methods. They find the Hein's method, despite its simplicity, a suitable method with broad diagnostic scope and high yield of positivity also for thin- capsulated ova of helminths and protozoan cysts (however, the specific diagnosis of the latter needs further methods with staining). They recommend Hein's method as one of the suitable screening methods under field conditions. At the same time, they report on the embedding of slide specimens in SOLAKRYL of Czechoslovak production. The findings are documented on microphotographs.

[Evaluation of ovoscopic methods in the diagnosis of invasion with the tapeworm, Taenia saginata]. / Hodnota ovoskopických metód v diagnostike invázií pásomnicou T. saginata.

During the period between 1979-1988 the authors examined 84 patients with the diagnosis of T. saginata by three ovoscopic methods to detect ova of tapeworms (Hein's method of faecal smears, Fust's method supplemented by examination of the sediment, and Graham-Brumpt's method of examination of the perianal area by means of an adhesive PVC tape. Of the mentioned methods Hein's method combined with Graham-Brumpt's method was most useful, as they detected ova of T. saginata during a single examination in 77 probands (91.7%). By Hein's method alone 8 positive (9.5%) cases were detected, by Graham-Brumpt's method alone 7 (8.3%) positive cases. Ovoscopic examination is recommended by the authors, in particular for workers engaged in animal farming and agriculture where the contact with the examined subjects is often difficult and they often do not report the excretion of segments in the faeces.