The prevalence of Heterakis infection in reproductive geese from 56 flocks was investigated between February 2015 and November 2019 using both anatomopathological and coproscopical examinations. The nematodes were microscopically examined and 37.5% (21/56) of the flocks were infected with Heterakis nematodes, mostly with H. dispar (35.7%). In one particular flock, a H. gallinarum infection was noted. In two flocks the invasion was identified only in coproscopical examination. The susceptibility on infection depended on the birds age – in the 1st reproductive season 50% of the flocks were positive, in the 2nd 42% and in the 3rd season 30%. The number of nematodes in each necropsied goose varied from 8 to 216 individuals. During the five years of epidemiological analysis, the decrease of infection occurrence was observed falling from 66.7 % to 11%.

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