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The foxes represent a reservoir of zoonotic infections therefore it is important to be familiar with an occurrence of possible diseases. Arctic fox (Vulpes lagopus) faeces were collected between 2003 and 2011 from various locations on Bylot Island, Canada. These samples were consequently treated with microscopic and molecular methods to prove the presence of microsporidia, cryptosporidia and giardia. The presence of a specific DNA of Cryptosporidium was detected in two samples and specific DNA of Microsporidia was detected in 34 samples for genus Encephalitozoon and in five samples for genus Enterocytozoon. None of the animals showed any symptoms of a diarrhoea. Subsequent analyses showed the presence of the Cryptosporidium canis fox genotype, Encephalitozoon cuniculi II and III genotypes and Encephalitozoon hellem genotype 1A. None of the examined faeces samples were positive for the presence of specific G. intestinalis DNA. Results of the thesis show that Artic foxes are mainly infected by microsporidia of the genus Encephalitozoon, while the occurrence of other observed parasites was rare.

Coccidia are monocellular parasites. They are prevalent worldwide and occur in the gastro-intestinal system and the liver of higher vertebrates. In some cases, they are highly pathogenic and can cause coccidiosis. Therefore coccidian are one of the most important harm factors in the keeping of farm animals. In conventional farming, the coccidia are fought by preventive medication. Since this is not allowed in organic farming, strict hygiene in the barn and a directed field management are there the strategies. The detection of coccidian in soil samples are vital for a directed field management. To establish a method for detection coccia of genus eimeria in soil samples is the content of this paper., Kokzidien sind einzellige Parasiten und weltweit verbreitet; sie kommen intrazellulär im Magen-Darmtrakt und der Leber vieler höherer Wirbeltiere vor. Teilweise sind sie hochpathogen und können die Kokzidiose auslösen, daher sind sie in der Nutztierhaltung einer der wirtschaftlich relevantesten Schadfaktoren. In der konventionellen Tierhaltung wird die Kokzidiose durch die präventive Gabe von Kokzidiostatika bekämpft. Diese sind in der biologischen Tierhaltung verboten, daher wird die Krankheit durch Stallhygiene und Weidemanagement vorgebeugt. Der Nachweis von Kokzidien in einer Bodenprobe ist für ein gezieltes Freilandmanagement zentral. Eine Methode zum Nachweis von Kokzidien der Gattung Eimeria in Bodenproben zu etablieren, ist Inhalt dieser Arbeit.

The aim of this diploma thesis was to evaluate the issue of endoparasitosis in horses in breeding in Brno and its surroundings. From November 2015 to January 2017, four stables with different numbers of horses with their different dispositions (age, sex, horse performance) were monitored. In total, 30 horses were observed and 450 samples of equine faeces were collected and analyzed. Samples were analyzed using flotation methods using the Breza solution. It was found that 82 % of the samples were infected with 0-5 eggs of Strongylidae parasites. The work has shown that the number of parasites egg negatively affect the horse health. The resistance of parasites to deworming products was not proven.

Fasioloides magna is a trematode parasitizing in the liver parenchyma of ruminants. Its life cycle is associated with the humid environment and includes intermediate freshwater snail hosts from family Lymnaeidae. According to the ability of host to form a certain type of a pseudocyst during fascioloidosis, they can be,divided in three groups, specific definitive hosts (red deers, fallow deers, roe deers), nonspecific definitive hosts (cattle, wild boars and elks) and atypical hosts (sheeps and goats). Beside the natural infections also the experimental infections of other potential host species has been realized (chamois, llama and bighorn sheep and traditional laboratory animals such as mice, guinea pigs, rats and rabbits). In the context of different diseases, many changes in infected organism can occur. These can be qualitatively and quantitatively evaluated. Similarly, during fascioloidosis the changes associated with the presence of the parasite in the host's body is possible to monitor, e.g. antibody production, increase in the number of eosinophils, release of eggs in faeces, internal bleeding, or the level liver damage. The liver damage is corresponding primarily to biochemical parameters of blood, not only the liver enzymes, but also other blood components, like blood proteins, lipids,...