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In 943 933 pigs the following parasitic invasion were confirmed: trichinellosis in 10 animals (0.0014%), echinococcosis — 21 748 (2.47%), sarcosporidiosis — 118 (0.02%) and ascaridosis — 7 244 (0.77%). In 216 900 cattle cysticercosis was confirmed in 409 animals (0.14%) and fasciolosis in 14 635 (7.16%), liver echinococcosis was not noted. In 16 912 sheep 636 (2.71%) were found to have fasciolosis and 58 (0.31%) had echinococcosis, cysticercosis was not discovered. The analysis showed the considerable decrease of incidence of pig trichinellosis in comparison with the years 1947—1965. The incidence of bovine cysticercosis, however, is regular.
The aim of the study was to investigate the prevalence of endoparasite infections in dogs taken care of in clinics in Olsztyn. Determining the prevalence of infections was based on faecal examination using standard coprological methods. Only nematode eggs were found. Of 157 faecal samples, 27% were positive. Among females, 40% of samples were positive, whereas among males -14%. All infected animals were over 18 months old. The most prevalent nematodes were Ancylostoma caninum (18%) and Toxocara canis (7%). In dogs dewormed during the year preceeding investigation, the prevalence of infection was 7%, while in unwormed ones – 33%.
A survey to determine current prevalence and intensity of bot fly (Gasterophilus spp). infection in horses at necropsy was conducted on material taken from a slaughterhouse in S³omniki near Krakow from January to April 2005. 83 untreated horses: one-year old foals (n=22) and adult horses (n=61) from small farms from southern Poland were examined. Third level instars of Gasterophilus intestinalis were found in the stomachs of 7 horses (8.4%), and the intensity of infection was from 1 to 180 larvae (a mean of 69.7). Parasites were found in 6 of the 58 mares (10.3%) and 1 of the 25 stallions (and geldings) (4.0%). Foals were not infected. Gasterophilosis in horses from small farms kept mainly under houses system or limited pasture occurs quite rarely.
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Kokcydia ciernika - Gasterosteus aculeatus (L.)

63%
Using the method of parasitological section and staining method H-E for histopathological sections, the author examined 281 indivuals of stickleback G. aculeatus (L.) during the years 1982-1985. In 65 individuals (lenght 2.5-6.0 cm) the presence of unsporulated oocysts of Eimeria aculeati Jastrzębski, 1984 in the intestine was found, in 27 fish of similar lenght - the presence of unsporulated oocysts of Eimeria żarnowskii Jastrzębski, 1982. Species was determined after sporulation of the oocysts in aquarium water, at 20°c. In the liver of two sticklebacks, 8.5 and 9.0 cm in lenght, numerous focuses with the oocysts of Eimeria gasterostei (Thélohan, 1890) Doflein, 1909 were found. In drying fresh smears of the liver a longitudinal, circumferential suture on the sporocyst wall was visible (fig. 1, 2) which made the authors revise the species and determine it as Goussia (Goussia) gasterostei (Thélohan, 1890) - s. Eimeria gasterostei (Thélohan, 1890) Doflein, 1909. G. gasterostei is a parasite new for Poland. Histopathological studies revealed the existence of intraplasmic meronts in the life cycle of E. aculeati, and these were classified by the authors in the following groups: 6-merozoit, 12-merozoit and 22-merozoit and are supposed to represent at least three generations of merogony. It was found that in the development of Eimeria żarnowskii the trophozoites and gamonts parasitise on the surface of the intestine epithelium (fig. 5, 6). In 19 of 265 fish two coccidia were found in the intestine: E. aculeati and E. żarnowskii. The extensity of the infection during the years 1982-85 is presented in table 1. The development forms of the parasites are presented in figs. 1-8.
The aim of the study was to estimate the extensiveness and intensity of Hippobosca equina in primitive Polish horses. Studies were carried out on 13 mares, 10 sucking colts as well as 15 mares and 10 stallions at 1.5-2 years of age from July 25-30, 2005. The presence of H. equina was found in all animals, but the number of insects depended on the horses age and sex. The extensiveness (E.i) and intensity (I.i) of invasion fluctuated between 23-38.5% 0.6-2.2 in mares, 10-30% and 1.0 in sucking colts, while in 1.5-2 year-old mares and stallions E.i. and I.i. it was 40-80%, 2.1-9 53.3-86.7% and 3.8-6.5 respectively. A certain level of anxiety, which manifested in intensive tail lashing and frequent scraping of posts or tree trunks, was observed in the animals despite the minor level of intensity in the invasion which did not exceed 9 insects per animal. Skin Inflammations were also noted, especially in mares, which were unrelated to the amount of parasites existing in the anus and pudendum lips. The lack of interest in H. equina invasions in horses on the part of veterinary surgeons is probably due to difficulties in actually diagnosing them, since this insect exists in places which are invisible and difficult to examine in grazing animals.
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