The goal of the work was to monitor the occurrence of helmintologic disorders of dogs in the district of Košice-surroundings. Moreover, the authors wished to evaluate the potential devitalising effect of the following selected chemical substances and disinfective agents: NaOH (5%, 70°C), Savo (10%), Saniten (10%), H1(100%) on eggs of T. canis under laboratory conditions. Using coprologic examination the authors realized that the most common eggs in dog feces are of T. canis (41.4%). Then follow eggs of Trichuris sp. (21.8%), T. leonina (11.5%), eggs from the Ancylostomatidae group (9.2%) and Capillaria sp. (2.3%). Under laboratory conditions, the ovocide effectiveness of NaOH on nonembryonated eggs of T. canis by an exposition of 180 minutes was 23.98 ± 4.33%. The disinfective agent SAVO also had low effectiveness; by an exposition of 180 minutes it devitalized 24.77 ± 5.33% of eggs of T. canis. A higher effectiveness was evidenced by the disinfective agent Saniten. Using the disinfective agent H1, 98.04 ± 1.77% eggs of T. canis were devitalized. Based on the testing of each agent under laboratory conditions the authors can recommend the usage of the disinfective agent Hviezda, as it evidenced the best devitalizing effect on the eggs of T. canis.
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