The aim of the study, conducted in the years 2011–2013, was to determine the level of gastrointestinal
parasites infection in New Zealand White rabbits, kept at the Experimental Station of the University of Agriculture in
Krakow. The study showed rabbits protozoan infection with the genus Eimeria, belonging – based on the sporulation
method – to the following species: E. magna, E. media, E. perforans, E. stiedae and E. irresidua. The highest
prevalence of infection, as well as the intensity of oocysts output (OPG – oocysts per gram of faeces), was noted for E.
magna and E. media – respectively 31.4 % (19477.3 OPG), and 40.0 % (14256.07 OPG). The infection of rabbits with
Eimeria spp. differed significantly between years. With regard to oocysts output, the level of infection was strongly
connected with the age of rabbits, being higher in young animals. However, the range of infection was highest among
adults. Among nematodes, Passalurus ambiguus pinworm was regularly found (prevalence reached 21.9%), other
species – Trichuris leporis, and Graphidium strigosum were rarely noted. The overall infection with nematodes did not
differ between years. Similarly, as in the case of Eimeria older individuals were more often infected by nematodes. We
observed some trends in parasite oocysts/eggs output; the protozoan oocysts were recorded more often in faecal samples
collected in the evenings, whereas the nematodes eggs occurred frequently in the mornings. This situation may be
related to the phenomenon of coprophagy occurring in the mammals of Lagomorpha order. The results of the study
indicate that especially coccidiosis constitute permanently throughout the years an important problem in the rabbitry
examined.
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