Comparison of treatment and economis efficacy of antihelminthics for swine ascariasis

Abstract

It was found that the causative agent of ascariasis is the most common among nematodes of pigs of different ages and production groups. Of the 150 helminthocoprooscopically examined samples, ascarides affected 74 heads, i.e. the extent of invasion (EI) was 49.3% with the intensity of invasion (II) of 24.4 specimens of eggs. We tracked the infestation of pigs in each age group and found that firstly we found ascaris eggs in pigs aged from 1.5 to 2 months. Extensity and intensity of infestation was respectively 13.3% and 5.5 specimens of eggs. Then extensity and intensity of infestation dramatically increased. Thus, in pigs aged 2–4 months, respectively, it accounted for 64.6% and 22.5 specimens of the eggs, so they were the most affected. The pigs aged 4–6 months also had a high degree of damage by ascarides. Extensity of invasion was 78.4% with intensity of infestation 31.9 specimens of eggs. Then extensity and intensity of ascaris infestation significantly decreased, and in fattening pigs it was, respectively, 37.1% and 12.5 egg specimens; in sows it was 16.7% and 3.5 specimens of eggs, respectively. The intensity of ascaris infestation ranged in groups from 20.3 to 30.8 eggs. On the 12th day after the last intake of anthelmintics, we sampled the faeces again. The results of helminthological tests after deworming indicate that 1% brovalsen and promectin provided a 100% therapeutic effect for pig ascaris invasion. Animals in the control group were infected with pathogens of ascariasis (EI = 100%, II = 27.8 eggs). In order to study the effect of ascarides on the body of pigs, at the beginning of the experiment and after 30 days the animals were weighed, as the assessment of the effectiveness of the tested drug was carried out also in terms of average daily gain. During the period of the experiment, which lasted 30 days, the average weight of pigs from research groups as the first as well as the second was higher than in the control group: the first experimental group by 1.98 kg or by 28.2%, and the second – by 2.27 kg or by 32,3%.