In biennial following (spring 2005, autumn 2005, spring 2006, autumn 2006) we're rasitology examine 288 samples dropping from heifers and 288 samples dropping from bulls. Exhibits we're examined floatation in Sheather´s sugar solution. In examinate dropping we're proved present cysts Giardia intestinalis and oocysts Cryptosporidium andersoni and family Eimeria. In heifers was most frequent parasites coccidia Eimeria sp. (28,5 %). Flagellata Giardia intestinalis occur in 17 % of all designs. At least we're open up Cryptospordium andersoni (9,4 %). In bulls we're noted highest occurrence coccidia Eimeria sp. (19,1 %). Almost same occurrence we're found out near Giardia intestinalis (18,8 %). Very low prevalence we're have observed near Cryptosporidium andersoni (1,4 %).

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The development of immune response accountable for the ability to control Cryptosporidium muris TS03 infection was studied using immunocompetent and various types of immunodeficient mouse models. Subsequently the immune response was characterized by analysis of leukocyte infiltration and cytokine production in gastric epithelium. Moreover, the potentiality of immunocompetent mice to develop effective immune response to C. andersoni LI03 infection with consequent protection to consequent infection of the same mice with C. muris TS03 was also studied by monitoring oocysts shedding, leukocyte infiltration of the gastric mucosa and cytokine production in ex vivo cultures of splenocytes.