| [occurrence of intestinal parasites among first grade students in poland in years 2002/2003]. | in the school year 2002/2003 there were examined in poland some of the population of 7-year-old children for the presence of intestinal parasites, continuing countrywide operation launched in 1988. methods: the studies were based on the examination of a single faecal specimen and a cellophane swab using the following methods: wet mount preparations in 0.9% nacl and diluted lugol's ioine, zinc sulphate centrifugal flotation and decantation. results and conclusions: the studies included 31 504 chi ... | 2004 | 15517810 |