Tetratrichomonas is a genus of parasites that usually inhabits the lower digestive tract, especially the ceacum of various birds species. The infection might lead to birds’ death, but in many cases it could be asymptomatic or with mild clinical signs, which might be not observed. Subclinical infections can be undiagnosed leading to production losses. To investigate the prevalence of Tetratrichomonas spp. in geese cloacal swabs were taken from 43 flocks of reproductive geese from 5 provinces in Poland after first, second or third laying season. The obtained swabs were placed in culture medium for propagation of the parasite before PCR was applied to detect the parasites’ DNA by PCR. Presence of genetic material of Tetratrichomonas was found in 38 (88.4%) of 43 flocks after cultivation. The main factors affecting the distribution of protozoa of the genus Tetratrichomonas in geesereproductive flocks in Poland were the number of laying seasons passed and the size of the flock in which the birds were kept.

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