[Monitoring the helmintological situation in a large-scale reproduction of pigs].

In 1976 to 1978, the occurrence of helminths in a large reproduction herd of pigs was studied in different age categories of the animals kept. Six helminth species were found in 30.7% of the sows: Ascaris suum (6.6%), Oesophagostomum dentatum (24.0%), Hyostrongylus rubidus (3.3%), Trichocephalus suis (1.3%), Strongyloides ransomi (0.7%), Metastrongylus sp. (0.3%). Four- to seven-month-old auction gilts had only the eggs of A. suum (4% of all cases). No helminith eggs were found in fattened piglets. Breeding boars were invaded by the species O. dentatum, H. rubidus and Metastrongylus sp. In elite herds and in gilts introduced from these herds, a higher extensity of invasion by different helminth species was found during quarantine and the findings even included the eggs of the species Capillaria sp. The anthelmintic effectiveness of Helmirazin (SpOFA) was also tested: in A. suum its effectiveness was 77.1%, in O. dentatum 66.2%, in T. suis the preparation remained ineffective. The technology of large-scale pig breeding under the conditions of reproduction herd of the PM-013-AGP type appears to be suitable from the helminthological points of view. In the planned introduction of animals from other breeding establishments it is necessary to subject the gilts to double treatment with an effective anthelmintic.