The mean prevalence of infection in domestic goose is 28.72 % according to coproovoscopic examinations. The mean prevalence of infection obtained in helminthological dissection of gut is 57.79 % in goose with intensity of infection 39.55±2.27 specimens/ host.
The species composition of capillariid nematodes is represented by Baruscapillaria anseris and Baruscapillaria obsignata.
Capillariasis is usually found in goose in mixed infections of digestive tract (PI up to 41.97 %, and 74.37 % of all capillariasis infections in goose). The most common pathogens in mixed infections with Baruscapillaria are nematodes А. anseris (with prevalence of infection 22.78 %) and H. dispar (PI = 14.15 %).
The relationships of Baruscapillaria worms in mixed infections of goose with nematodes and cestodes are studied in Ukraine for the first time. The abundance of capillariids decreases in hosts gradually by 46.83–72.67 % with the accumulation of pathogens of other associated infections. If the nematode species В. obsignata, В. anseris, T. tenuis co-parasitize an organ of the host’s digestive system, they are in antagonistic relationship as evidenced by the abundance parameters. Also the cestode species Drepanidotenia lanceolata and Tschertkovilepis setigera affect the abundance of the capillariid species В. anseris and В. obsignata, which decreases in 3.12 – 6.21 times in mixed infections .
Prevalence of capillariid infection gradually increases with the age of the host and peaks in adult 24-month old geese (PI up to 76.81 %). Intensity of infection increases with the age of the host and is the highest in 9 to 12 months old geese (60.16±4.17 specimens/ host). The seasonal dynamics of the capillariasis in goose is characterized by the peak of infection during spring and summer according to the coproovoscopic examination (max PI 54.55 %, max II 80.67±5.29 eggs/g of feces), and by the peak of infection in winter and spring by the helminthological dissection (max PI 72.22 %, max II 37.48±1.70 specimens/ host).
For the first time in Ukraine, comparative analysis is performed of morphometric parameters in male and female B. anseris and B. obsignata capillariids. Thus, 17 morphometric parameters are suggested for the identification of B. anseris and B. obsignata males. In females of B. anseris and B. obsignata, seven morphometric parameters are considered in species identification.
The improved method for post-mortem diagnostics of capillariasis in goose is more effective by the parameters of performance (by 30.11–48.85 %, and 2.2 times by ergonomic ease compared to the common method of post-mortem diagnostics of capillariasis of birds.
The erythrocyte count in blood of goose infected with B. obsignata decreases by 27.59 %, hemoglobin level by 15.17 % , the leukocyte count increases by 11.61 % and the eosinophil count by 22.92 % . In blood plasma, albumin levels decrease by 10.65 %, globulin levels increase by 5.16 %, alkaline phosphatase activity increases by 12.25 % and AlAT activity grows by 14.06 % .
In the blood of goose infected with B. anseris, the erythrocyte count significantly decreases (by 32.35 %), hemoglobin level decreases by 11.46 %, leukocyte count increases by 12.86 %, eosinophil count increases by 26.32 % , pseudoeosinophil count increases by 5.81 % , and the lymphocyte count decreases by 7.32 % . In that blood plasma, total protein level decreases by 6.35 %, albumin levels drop by 14.67 % , total bilirubin level increase by 20.31 % , alkaline phosphatase activity increases by 13.00 % , AlAT activity grows by 22.30 %, and AcAT activity АсАТ increases by 7.76 % .
It is established that the most effective preparations in treatment of the capillariasis of goose is brovadazol plus. Its EE and II are 100.0 %. The EE and II of phenzol 22 % are 100.0 % by coproovoscopic examinations of birds infected with capillariasis. Piperazine 45 % is not sufficiently effective in treatment of capillariasis in goose. High disinfecting efficiency is seen for «Dezsan» in 1.0–2.0 % concentrations against culture of В. anseris eggs (91.21–100.0 %) and В. obsignata eggs (93.10–100.0 %). High disinfecting efficiency (91.21–100.0 %) of preparation «Anolit Kristal» is observed against the culture of В. аnseris eggs in concentrations of 0.025 % , 0.033 % , 0.05 % and 0.1 % . Using «Anolit Kristal» against the culture of В. оbsignata eggs results in high disinfecting activity (91.95–100.00 %) in concentrations of 0.02 %, 0.025–0.1 % .
Key words: capillariasis, Baruscapillaria obsignata, Baruscapillaria anseris, domestic goose, distribution, diagnostics, antihelminthics, disinfection.
