Кафедра паразитології та ветеринарно-санітарної експертизи

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Description of feather mite Proctophyllodes musicus(Acariformes, Proctophyllodidae) obtained from Turdus merula
(2024) Мельничук, Віталій Васильович; Melnychuk, V. V.; Євстаф’єва, Валентина Олександрівна; Yevstafieva, V. O.; Коломак, Ігор Олегович; Kolomak, I. O.; Філоненко, Сергій Васильович; Filonenko, S. V.; Опара, Надія Миколаївна; Opara, N. M.; Muzyka, D.; Chaplygina, A.
Feather mites (Acariformes, Astigmata) are a large group of species in which mites of the genus Proctophyllodes Robin, 1868. Analgoidea are among the most common parasites of passerines. These mites are permanent obligate ectoparasites localized on the flight feathers, greater wing coverts, and on the tail. Most species of feather mites are characterized by high host specificity. The taxonomy and fauna of feather mites of the genus Proctophyllodes, and their morphological identification characters in different countries of the world are still a matter of research. The aim of our work was to describe the morphological features and metric parameters of feather mites of the species P. musicus Vitzthum, 1922, isolated from the common blackbird Turdus merula Linnaeus, 1758 in Ukraine. 32 parameters are determined in males and females of P.musicus mites, which characterize both their general structure of the body and sexual dimorphism. The structure and sizes of the body, gnathosoma, idiosoma, prodorsal and hysteronotal shields, epimerites I, setae cp and c3, and the distance between setae of the scapula se–se and si–si are described. In males, the sizes of adanal sucker discs, epigastric shields, genital arch, setae ps2, h3, h2, the distance between setae 4a–4a, g–g, ps3–ps3, ps1–ps1 are additionally described and determined. Lamellae in males are wide, tongueshaped, do not overlap. The aedeagus is short, slightly extending beyond the posterior margin of the genital arch. In female mites, the dimensions of the lobar shield, terminal appendages, and terminal recess are additionally described and determined, taking into account the location of setae ps1, h2, the dimensions of setae cp, c3, h3, h2, the distance between setae h1–h1, the distance between hysteronotal and lobar shields. The mite eggs were measured in the body of the female and on the feathers of the birds. The scientific data obtained in this study expand the already existing data on morphological and metric characters of feather mites of the species P. musicus(Proctophyllodidae) isolated from the common blackbird
DESCRIPTION OF THE NEMATODE DIROFILARIA REPENS (NEMATODA, ONCHOCERCIDAE) PARASITIC IN DOGS IN UKRAINE
(2023) Євстаф’єва, Валентина Олександрівна; Yevstafieva, V. O.; Мельничук, Віталій Васильович; Melnychuk, V. V.; Кравченко, Сергій Олександрович; Kravchenko, S. O.; Киричко, Олена Борисівна; Kyrychko, O. B.; Дмитренко, Надія Іванівна; Dmytrenko, N. I.; Сизоненко, Наталія Миколаївна; Syzonenko, N. M.; Опара, Надія Миколаївна; Opara, N. M.
Dirofi lariasis is a zoonotic disease of domestic and wild carnivorous animals and humans. Subcutaneous migration of the parasite Dirofi laria repens Railliet & Henry, 1911 can lead to the local swellings with changeable localization. In humans, this parasite can cause the damage of lungs, male genitalia, and eyes. Th e range of D. repens is constantly spreading to new areas, and, considering the zoonotic potential of this parasite, it is important to widen the existing data concerning the morphology of D. repens. Present study provides the morphometric description of nematodes D. repens, obtained from subcutaneous tissue of dogs in Ukraine. Th e aim of this study was to make an accent on the key features for performing the identifi cation of parasites of this species. For males, 27 morphometric traits were identifi ed, characterising the total size of the body and the esophagus, the thickness of the cuticle in the region of the mouth opening, the localisation of the nerve ring and the cloaca, the morphological structure and metric parameters of the spicules, and the length of the tail. For females, 18 morphometric traits were identifi ed that, in addition to the common parameters, characterise cuticle thickness in the region of the vulva, localisation of the vulva and anus, body width in the regions of the anus and vulva, and tail length. Th is report widens the existing data on the morphological and metric characteristics of nematodes D. repens
Differential characters of fleas of the genus Ctenocephalides (Siphonaptera, Pulicidae) obtained from dogs
(2021-05) Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна ; Горб, К.О.; Melnychuk, V. V.; Мельничук, Віталій Васильович ; Горб, Олег Олександрович
Differential species characters of Baruscapillaria anserisand B. obsignatanematodes obtained from the domestic goose
(Regulatory Mechanism in Biosystems, 2018) Yevstafieva, V. O. ; Євстаф’єва, Валентина Олександрівна; Yeresko, V.I.; Pishchalenko, M. A.; Nagorna, L. V.; Піщаленко, Марина Анатоліївна
The study presents species composition and abundance of nematodes of the family Capillariidae (Nematoda, Trichocephalida), parasitizing the domestic goose (Anser anser dom. Linnaeus, 1758) in Poltava region, Ukraine. Morphological specifics of adult specimens of collected helminths are examined and new data is obtained for species identification of Capillariidae considering their metric parameters. The pathogens of capillariasis in geese are represented by two species, Baruscapillaria anseris (Madsen, 1945) Moravec, 1982 and B. obsignata(Madsen, 1945) Moravec, 1982 with the former predominant. Prevalence of infection by B. anserisin domestic fowl was up to 46.8%, the abundance index reached 17.9 specimens.
Ectoparasites Ctenocephalides (Siphonaptera, Pulicidae) in the composition of mixed infestations in domestic dogs from Poltava, Ukraine
(2020-07) Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна ; Горб, К.; Melnychuk, V. V.; Мельничук, Віталій Васильович ; Бахур, Т.; Фещенко, Д.
Effect of Dermanyssus gallinae on zootechnical and productive indicators of farming chicken.
(2024) Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна; Петруненко А. П.
Results of the study of the impact of ticks on the productive indicators of industrial poultry farming in Ukraine are presented in the article. The spread of parasites that attack poultry leads to significant losses in the poultry industry. Modern technologies of poultry farming create favourable conditions for the rapid spread of dermanisiosis in chickens. Dermanyssus gallinae ticks are among the most dangerous blood-sucking ectoparasites, in addition, they are carriers of dangerous bird infections pathogens. The goal of the work was to establish the effect of D. gallinae parasitism on zootechnical indicators of chickens. The research was carried out on the premicies of the "Poultry Farms of Poltava region" farm in the Poltava district of the Poltava region with the support of the laboratory of parasitology of the Poltava State Agrarian University (Poltava). The results of present study established detrimental impact of D. gallinae parasitism on zootechnical indicators of chickens (total number of birds, survival rate, live weight, livestock losses) during the poultry farming. In particular, under the conditions of contamination of the poultry house, the birds were dying before the age of 59 weeks, and the live weight of chickens with D. gallinae ectoparasites was 32.1% lower during this period compared to the clinically healthy birds. In clinically healthy chickens, live weight gradually increased from 1.4 to 2.2 kg from 15 weeks to 34 weeks. While in birds contaminated with ectoparasites, the weight increased from 1.3 to 1.9 kg during the same period, but gradually decreased from the 34th week to 1.4 kg at the 58th week. The survival rate of tick-contaminated chickens during the experiment decreased to 24.9% (over a period of 58 weeks) and was 73.9% lower than that of clinically healthy chickens aged 58 weeks. It was established that the death rate of chickens under the conditions of D. gallinae tick parasitism was 75.0%, which is 7.2 times higher than that of clinically healthy chickens. The data we obtained prove the relevance of research and development of means of solving the problem of chicken dermanisiosis in Ukraine, given the significant negative impact of ectoparasites D. gallinae on the live weight of chickens, the period of their breeding, and the indicators of their survival rates
Effect of temperature on the survival rates of the embryonic states of development of Trichuris skrjabini nematodes parasitizing sheep
(2023-06) Yevstafieva, V. O.; Petrenko, M. O.; Melnychuk, V. V.; Vakulenko, Y. V.; Titarenko, O. V.; Shaferivskyi, B. S.; Pishchalenko, M. A.; Filonenko, S. V.; Sheiko, S. V.; Євстаф’єва, Валентина Олександрівна ; Петренко, Максим Олександрович ; Мельничук, Віталій Васильович ; Вакуленко, Юлія Валентинівна; Бахур-Каваляускене Т.І.; Тітаренко, Олена Вікторівна ; Шаферівський, Богдан Сергійович ; Піщаленко, Марина Анатоліївна ; Філоненко, Сергій Васильович ; Шейко, Сергій Володимирович
The prevention of the trichurosis of sheep requires understanding the terms of development of pathogens and their survival in the environment under the influence of abiotic factors. This study was conducted to determine the tolerance to a temperature factor of Trichuris skrjabini nematode eggs isolated from sheep. Trichuris eggs were obtained from the gonads of female nematodes in laboratory conditions and cultivated in a thermostat until the appearance of motile larvae in the eggs at the temperatures of 20°C, 25°C, and 30°C. It was determined that the time of formation of infectious eggs decreases with increasing temperature. The temperature of 25°С was found to be the most favorable for the development of T. skrjabini eggs in laboratory conditions, and 80.3% of eggs with motile larvae formed on the 54th day. Temperatures of 20°С and 30°С were less advantageous to the process of embryogenesis. The motile larvae develop in eggs in 63 days at 20°С and in 45 days at 30°С, and their respective survival rates are 77.0% and 75.3%. The obtained data increase the effectiveness of planning measures to prevent the trichurosis of sheep, taking into account the period of development of the pathogen depending on the temperature of the environment
Efficacy of treatment measures for rabbit passalurosis
(2023) Хорольський, А. А.; Євстаф’єва, Валентина Олександрівна; Мельничук, Віталій Васильович; Yevstafieva, V. O.; Melnychuk, V. V.
Helminthes of Passalurus ambiguus species are one of the most common parasites of the intestinal tract of domestic rabbits both on industrial rabbit farms and private farms. The most effective way to treat and prevent passalurosis in animals at present is the use of anti-helminthic preparations, where determining the degree of their anti-parasitic effect is a topical direction of research. This will make it possible to raise the effectiveness of maintaining well-being on rabbit farms and the animals’ timely recovery from this infestation. The purpose of the study was to establish the effectiveness of treatment measures for rabbit passalurosis. The research was carried out on a private farm that was unfavorable as to passalurosis and on the basis of the Laboratory of Parasitology of Poltava State Agrarian University. The therapeutic efficacy of Brovermectin 1 % solution (the active substance is ivermectin), Brovalzen powder (the active substance is albendazole), Albendazole 7.5 % suspension (the active substance is albendazole) was tested in case of rabbit spontaneous passalurosis. It was established that on the 7th day of treatment, the indicators of extense-effectiveness and intense-effectiveness were, respectively: of Brovermectin 1 % – 50.0 and 64.31 %, Brovalzen powder – 70.0 and 82.63 %, Albendazole 7.5 % suspension – 60.0 and 60.9 %. On the 14th day of treatment, Brovalzen powder and Albendazole 7.5 % suspension turned out the most effective preparations for rabbit passalurosis, where the indicators of their extense-effectiveness and intenseeffectiveness reached 100.0 %. A lower therapeutic effectiveness was registered when using Brovermectin 1 % solution, which was injected to diseased animals. Its extense-effectiveness and intense-effectiveness made 60.0 and 80.9 %, respectively. Moreover, the indicators of the intensity of passalurous invasion on the 7th and 14th day of treatment were at the level of 4.20±1.27 and 2.50±0.75 eggs, and the indicators of the prevalence of passalurous infection were 50.0 and 40.0 %, respectively. The obtained results of experimental studies allow recommend antihelminthic oral preparations of domestic production Brovalzen powder and Albendazole 7.5 % suspension for effective treatment and prevention of rabbit passalurosis
Epizootological monitoring studies of chicken heterakosis spreading on the territory of Poltava region
(2023) Євстаф’єва, Валентина Олександрівна; Омельченко, О. В.; Yevstafieva, V. O.; Omelchenko O. V.
Poultry breeding is one of the most promising branches of agriculture. Serious losses to this industry are caused by invasion diseases, including chicken heterakosis, which is widespread throughout the world. Heterakises cause pathological changes in the caecum, where various forms of typhlitises and enterohepatitises develop, and at high prevalence of infection, especially in young animals, lead to their death. The causative agent of the disease, Heterakis gallinarum nematode, is a parasitic organism environmentally adapted to the climatic conditions of many geographical zones, which contributes to its wide spreading. The purpose of the research was to investigate chicken heterakosis spreading based on the results of analyzing the reporting documentation of the State Food and Consumer Service in Poltava region during 2018–2023. The conducted monitoring studies have established that in the conditions of the investigated region, the share of heterakosis among contagious poultry diseases makes 7.62 %. Infective poultry diseases account for 8.57 %. At the same time, the share of invasion diseases among poultry virulent pathology reaches 83.81 %. The share of heterakosis among poultry invasion diseases was at the level of 8.33 %, where the share of protozoases was the largest (67.71 %). Nematodoses accounted for a smaller share (18.75 %). Cestodiases were most rarely detected in poultry (5.21 %). Among the protozoan, nematodous and cestodous poultry diseases on the territory of Poltava region, eimeriosis made the largest percentage (67.71 %). Among nematodoses, the share of ascariasis was 16.67 %, capillariasis – 2.08 %. Among cestodoses, drepanidoteniosis was detected, the share of which made 5.21 %. Analyzing the indicators of the prevalence of heterakosis infection found on the territory of poultry farms in Poltava region, it was found that chickens’ infestation rate with heterakosis pathogen ranged from 0.06 to 0.19 % with an average value of 0.1 %. The highest indicators of the prevalence of heterakosis infection were detected in 2019–0.19 %. During 2020–2022, the infestation rates of poultry with heterakises gradually decreased from 0.12 to 0.06 %. The results of monitoring studies point to the relevance of further investigating the epizootological peculiarities of chicken heterakosis on the territory of certain regions of Ukraine
Forticept® innovative products’ effectiveness for complex udder hygiene
(2020-12) Шевченко, А.Н.; Фещенко, Д.В.; Бахур, Т.І.; Згозинська, О.А.; Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна ; Сашук, Р.Н.; Стравський, Є.С.; Антіпов, А.А.; Melnychuk, V. V.; Мельничук, Віталій Васильович
Impact of military actions on the epizootic situation with the spread of rabies in animals in Kherson Oblast
(2024) Мельничук, Віталій Васильович; Melnychuk, V. V.; Євстаф’єва, Валентина Олександрівна; Yevstafieva, V. O.; Слинько, Віктор Григорович; Slynko, V. H.
Rabies is a zoonotic disease caused by a neurotropic RNA virus of the Lyssavirus genus, recorded in various species of wild and domestic animals in many countries of the world, including Ukraine, where this disease has been continuosly diagnosed in animals and sporadically in people. Therefore, there is a need to study the epizootic specifics of rabies in different species of animals as potential sources of threat to people in individual administrative-territorial units of Ukraine. This becomes especially relevant against the background of martial law and the catastrophic flooding which took place in Kherson Oblast. Determining the peculiarities and manifestations of epizootic process of rabies in animals was conducted in the conditions of de-occupied territories of Kherson Oblast in 2023. During that year, 27 studies of samples of pathological/biological materials from animals suspected of rabies were conducted. Those included 24 samples from domestic animals – cattle (Bos taurus), dogs (Canis lupus familiaris), cats (Felis silvestris catus), and 3 from wild animals – fox (Vulpes vulpes) and jackals (Canis aureus). According to the results, rabies was confirmed in 88.9% of the total number of analyzed samples. Most often, rabies was diagnosed in domestic animals, particularly, dogs and cats –45.8% and 29.2%, respectively. In the representatives of wild fauna, rabies was detected in 12.5% of the cases, in particular, 8.3% in foxes and 4.2% in jackals. The analysis of the seasonality of rabies morbidity in animals found no pattern in the dynamics. However, according to species, the peak of rabies in foxes took place in autumn, particularly, September and October. An important fact is that the bulk of rabies cases, acccounting for 91.7%, occurred in the period after the Kahovka Dam had been blown up by the Russian Federation. Territorially, during the surveillance period, rabies in animals was confirmed in 23 settlements of Kherson Oblast: 22 cases within the Oblast’s districts and one case in the city of Kherson proper
In vitro tests of effect of disinfectants on the viability of Heterakis gallinarum nematode eggs during embryogenesis
(2024) Євстаф’єва, Валентина Олександрівна; Yevstafieva, V. O.; Омельченко, О. В.; Omelchenko O. V.; Мельничук, Віталій Васильович; Melnychuk, V. V.; Дмитренко, Надія Іванівна; Dmytrenko, N. I.; Крикунова, Валентина Юхимівна; Krykunova, V. E.; Передера, Олена Олександрівна; Peredera, O. O.; Тагільцева, Яніна Михайлівна; Tahiltseva, Y. М.
Affecting the transmission of an infection, objects of the external environment become contaminated with pathogens as a result of their massive release by the definitive host during exogenous stages of parasites’ development, which is an important chain of their epizootic process. Therefore, disinfestation plays an important role in the complex of measures for the prevention and control of poultry helminthiases, including Heterakis gallinarum infection of chickens. The purpose of the research was to investigate in laboratory conditions the ovicidal efficiency of modern disinfectants in relation to the viability of developing eggs of H. gallinarum isolated from infested chickens. "Hermecid-VS" (didecyldimethylammonium chloride, glutaraldehyde, benzalkonium chloride) and "Arquadez-plus" (dimethyldialkylammonium chloride, didecyldimethylammonium chloride, tetrasodium salt) disinfectants were tested. These preparations had a high level of ovicidal efficiency against the eggs of Heterakis, "Hermecid-VS" in 0.25% and 0.5% concentration for exposures of 10–60min (93.5–100.0%), "Arquadez-plus" in 1.0% concentration for exposure of 60 min (93.1%), and at 1.5% (96.8–100.0%) and 2.0% (100.0%) concentrations regardless of exposure. The ovicidal effect of disinfectants was characterized by morphological changes in the nematode eggs when using "Hermecid-VS" – accumulation of air bubbles under the shell, thinning and deformation of the shell, death and gradual resorption of the embryo, loosened egg shell and terminated embryonic development, deformation and thinning of egg the shell, and death of the embryo at the stage of formation of the larva; under the effect of "Arquadez-plus", a stop in development at the stage of cleaving blastomeres, destruction of the shell, death and evacuation of the embryo from the egg, shrinkage and gradual defragmentation of the embryo, death of the larva and its defragmentation. Under the action of disinfectants, the metric parameters of Heterakis eggs also changed. Under the influence of "Hermecid-VS" at all concentrations, the length of the eggs and the thickness of the shell were larger (by 2.9–5.4% and 26.7–46.7%), and their width was smaller (by 5.5–6.9%). With the effect of "Arquadez-plus", the length of the eggs was greater (by 0.4–2.0%), and the width was smaller (by 0.7–4.9%) only when using 0.1–2.0% concentrations of the agent. Heterakis egg shell thickness increased under the influence of "Arquadez-plus" in concentrations of 0.25–2.0% (by 33.3–40.0%). The conducted studies allow us to recommend "Hermecid-VS" and "Arquadez-plus" disinfectants in specified concentrations and modes of their use for maintaining epizootic well-being in the complex of measures against Heterakisinfection of chickesn
Morpho-anatomical traits of Cysticercus pisiformis in European rabbits (Oryctolagus cuniculus)
(2024) Mykhailiutenko, S. M.; Kruchynenko, O. V; Kuzmenko, L.; Klymenko, O.; Dmytrenko, N.; Михайлютенко, Світлана Миколаївна; Кручиненко, Олег Вікторович
The study was conducted in the laboratory of the Department of Parasitology and Veterinary-Sanitary Examination of the Poltava State Agrarian University. In total, 154 slaughtered rabbits of the Grey Giant breed aged 34 months, reared at private farms of the Poltava region (Ukraine) were examined. The aim of the research was to establish differential morphological and metrical features of metacestodes isolated from domestic rabbits. Only one species, Cysticercus pisiformis was recorded; invasion rate was 17.53%. White-grey bubbles were found on the serous membranes of the abdominal and, less often, thoracic cavities. The ultrastructural characteristics of the main parts of the scolex, such as suckers, rostellum and hooks are given. The morphometric characteristics of metacestodes collected from male and female rabbits were slightly different. The study of chitinoid hooks had the greatest diagnostic value. A statistically significant variation was noted for large and small hooks. Thus, the average size of large and small hooks was likely to be smaller by 1.33 and 3.37%, respectively in samples obtained from female rabbits. The metacestodes isolated from female rabbits were larger than those obtained from male rabbits regarding length of the handle of the large (114.28 μm vs. 105.26 μm) and small hooks (43.06 μm vs. 39.3 μm, respectively)
Morphobiological analysis of Trichuris vulpis (Nematoda, Trichuridae), obtained from domestic dogs
(2019) Yevstafieva, V. O. ; Євстаф’єва, Валентина Олександрівна; Kravchenko, S. O.; Gutyj, B.; Melnychuk, V. V. ; Мельничук, Віталій Васильович; Kovalenko, P. N.; Volovyk, L. B.; Воловик, Лариса Борисівна; Кравченко, Сергій Олександрович
Morphological characteristic of Skrjabinema ovis (Nematoda, Oxyuridae) obtained from domestic sheep
(2020-10) Melnychuk, V. V.; Мельничук, Віталій Васильович ; Решетило, О.І.
Morphological Characteristics of Dicrocoelium dendriticum (Digenea, Dicrocoeliidae), Parasitizing Three Host Species in the Central Regions of Ukraine O. V. Kruchynenko
(2020) Kruchynenko, O. V.; Mykhailiutenko, S. M.; Klymenko, O. S.; Kanivets, N. S.; Korchan, L. M.; Кручиненко, Олег Вікторович; Корчан, Леонід Миколайович; Михайлютенко, Світлана Миколаївна; Канівець, Наталія Сергіївна
Morphological Characteristics of Parasitic Nematodes Trichuris sylvilagi (Nematoda, Trichuridae)
(2022-06) Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна ; Стибель, В.; Melnychuk, V. V.; Мельничук, Віталій Васильович ; Нагорна, Л.; Dmytrenko, N. I.; Дмитренко, Надія Іванівна ; Titarenko, O. V.; Тітаренко, Олена Вікторівна ; Дубова, О.; Makarets, S.; Макарець, Світлана Володимирівна ; Filonenko, S. V.; Філоненко, Сергій Васильович; Pishchalenko, M. A.; Піщаленко, Марина Анатоліївна; Kone, M. S.; Коне, Мохамед Сумана ; Ilchenko, A.; Ільченко, Алла Михайлівна
Morphological features of the causative agent of chorioptic mange isolated from cattle
(2024) Melnychuk, V. V.; Kovalenko S.; Yevstafieva, V. O.; Korchan, L. M.; Kone, M. S.; Titarenko, O. V.; Мельничук, Віталій Васильович; Євстаф’єва, Валентина Олександрівна; Корчан, Леонід Миколайович; Коне, Мохамед Сумана; Тітаренко, Олена Вікторівна; Nikiforova O.
Providing veterinary care against parasitic diseases is one of the factors that affect the possibility of effective and profitable introduction of the livestock sector. Chorioptic mange is one of the globally spread invasive diseases of cattle caused by persistent ectoparasites. The diagnosis of chorioptosis is based on the microscopic detection of mites in scrapings from the skin of the affected animal with mandatory identification of the parasites. The aim of the research was to investigate the morphological features and metric parameters of Chorioptesmites isolated from cattle. Mites isolated from cattle were morphometrically identified as Chorioptestexanus. Morphological features of male Ch. texanus mites include peculiarities in the structure of the opisthosomal lobes and of the setae located on the opisthosomal lobes, opisthosoma and tarsus of leg III. 14 morphometric parameters characterizing the general structure of the body (length, width and their ratio, length and width of the gnathosoma, length of the idiosoma, proterosoma, podosoma, propodosoma, metapodosoma, hysterosoma, opisthosoma, length and width of the propodosomal shield) were identified and suggested for use in identification of male and female Ch. texanus. In male mites of this species, 5 additional parameters were also determined, which describe the length and width of the opisthomal lobes, their ratio, the diameter of the adanal suckers and the distance between them. The morphological features, location and length of 6 setae, which are species-specific in Chorioptes mites, namely 4 setae of the opisthosomal lobe, 1 opisthosomal seta, 1 ventral seta of tarsus III, were described. The parameters of Ch.texanus eggs in the bodies of female mites and on the body of the host animal were determined. The scientific data obtained in this study expand the already existing data on the differential identification of Ch. texanus mites and proves their parasitism in cattle on the territory of Ukraine
Morphological identification of Nematodirus spathiger nematodes (Nematoda, Molineidae) obtained from the small intestine of sheep
(2021-05) Melnychuk, V. V.; Мельничук, Віталій Васильович ; Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна ; Pishchalenko, M. A. ; Піщаленко, Марина Анатоліївна; Решетило, О.; Антіпов, А.
Morphological variation of Varroa destructor (Parasitiformes, Varroidae) in different seasons
(2020-03) Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна ; Залозна, Л.М.; Назаренко, О.С.; Melnychuk, V. V.; Мельничук, Віталій Васильович ; Соболта, А.Г.

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