Друковані видання. Кафедра паразитології та ветеринарно-санітарної експертизи

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    Morphological characteristics of Dermanyssus gallinae (Mesostigmata, Dermanyssidae)
    (2025) Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна; Petrunenko, A. P.; Петруненко, А. П.; Melnychuk, V. V.; Мельничук, Віталій Васильович; Petrenko, M. O.; Петренко, Максим Олександрович; Korchan, L. M.; Корчан, Леонід Миколайович; Shcherbakova, N. S.; Щербакова, Наталія Сергіївна; Dedukhno, A. V.; Дедухно, Алла Володимирівна; Krasota, O. G.; Красота, Олена Григорівна
    The red mite Dermanyssus gallinae (De Geer, 1778), a dangerous parasite of poultry which causes significant economic losses to poultry farming, is widespread, including in economically developed countries. These mites are transient blood-sucking parasites that can attack not only birds and other mammals, but also humans, causing itching and dermatitis. A deeper understanding of the morphology and identification of D. gallinae will allow us to avoid complications in their differentiation from similar dermanyssid parasites, which may share the host species and environment. The aim of the research was to describe the morphological features and metric parameters of gamasid mites of the species D. gallinae, isolated from chickens in Ukraine. Morphometric studies have identified 30 parameters in male and 40 indicators in female mites, which characterize the general structure of the body, speciesspecific morphological features, as well as characters of sexual dimorphism. In male and female mites, the structure and dimensions of the body, gnathosoma, idiosoma, tagmas, dorsal shield, specific arrangement of dorsal setae, length of adanal and postanal setae, as well as the distance between sternal setae st1–st1, st2–st2, st3–st3, st1–st2, st1–st3, metasternal setae mst–mst, ventral setae vl1– vl1, adanal setae ad–ad are described. A characteristic feature of females of D. gallinae is the presence of a stylet-like second cheliceral article, while in males there are no cheliceral articles of a stylet-like shape. In males, the dimensions of the sternogenital and ventroanal shields are additionally described and determined. In females, the dimensions of the sternal, genitoventral and anal shields, the genitoventral valve, the length of the setae st1, st2, st3, mst, and the distance between the setae st1–mst were additionally described and determined. For the first time, the dimensions of females with a formed egg in their body cavity were described and compared with the dimensions of female mites without eggs. The data obtained in this study expands existing data on the morphometric characteristics of male and female D. gallinae
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    The influence of chemicals on the development and viability of Trichuris vulpis nematode eggs isolated from infested dogs
    (2023) Євстаф’єва, Валентина Олександрівна; Долгін, Олександр Сергійович; Мельничук, Віталій Васильович; Дедухно, Алла Володимирівна; Піщаленко, Марина Анатоліївна; Красота, Олена Григорівна; Yevstafieva, V. O.; Dolhin, O. S.; Melnychuk, V. V.; Dedukhno, A. V.; Pishchalenko, M. A.; Krasota, O. G.
    Preventive measures against invasive diseases should be carried out taking into account the peculiarities of the life cycle of helminths.This is especially relevant for geohelmintiases, where the infection is mainly transmitted via environmental objects contaminated with the pathogen at the exogenous stages of the parasite’s development. It has been proven that among the causative agents of nematodoses of the gastrointestinal tract of animals, the eggs of geohelminths of the genus Trichuris are the most resistant to the action of disinfectants. The aim of the research was to establish in laboratory conditions the ovicidal effect of chemicals on the development and viability of Trichuris vulpis nematode eggs isolated from infested dogs. Two disinfectants were tested in vitro, Arquades-plus (dialkyl dimethyl ammonium chloride, dodecyl dimethyl ammonium chloride, tetrasodium salt) and Brovadez-plus (alkyl dimethyl benzyl ammonium chloride, dodecyl dimethyl ammonium chloride). Arquades-plus disinfectant showed a high level of ovicidal efficiency (94.0%) only at the maximum concentration and exposure (2.0%, 60 min), and 4.7% of nematode eggs in the test culture remained viable. Brovadez-plus disinfectant was less effective and did not provide a high level of ovicidal efficiency against Trichuris eggs in the studied concentrations and exposures. Satisfactory and unsatisfactory levels of its ovicidal effect (63.1–77.1% and 2.5–58.9%) were established when using the product in concentrations of 2.0% and 0.5–1.5%, respectively, for exposures of 10–60 min. The disinfestation activity of the preparations was characterized by metric changes in experimental test cultures compared to the control test culture. Under the influence of Arquadesplus at all concentrations, the length of the eggs was greater (by 0.4–2.0%), and the width was smaller (by 0.7–4.9%). Under the influence of Brovadez-plus in concentrations of 1.0–2.0%, the length of the eggs was greater (by 0.5–0.9%), the width was smaller (by 0.3–4.1%). The results of the conducted studies allow us to recommend the Arquades-plus disinfectant in a 2.0% concentration (exposure of 60 minutes) for effective control and prevention of infection of dogs with the causative agent of trichurosis