Перегляд за Автор "Yevstafieva, V. O."

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  • Ескіз
    Публікація
    A panel of five microsatellites as an alternative to mitogenome sequencing for investigating the genetic diversity of Echinococcus granulosus sensu stricto from global to farm scale
    (2026) Umhang, G.; Bastid, V.; Rinaldi, L.; Pepe, P.; Ciccone, E.; Sotiraki, S.; Ligda, P.; Oudni-M’rad, M.; M’rad, S.; Lahmar, S.; Said, Y.; Elmehatli, K.; Ahmed, H.; Kuzmina, T.; Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна; Aghayan, S. A.; Gevorgyan, H.; Simsek, S.; Ponce-Gordo, F.; Benchikh El Fegoun, M. C.; Berbri, I. E.; Fihri, O. F.; Saarma, U.; Grenouillet, F.; Bou´, F.; Aguayo, J.
    While the molecular identification of Echinococcus granulosus species is essential for surveillance, a detailed investigation of the parasite’s genetic diversity would offer a more accurate understanding of its transmission. This may be done by partial or whole mitochondrial genome sequencing, but both cost and time requirements limit routine application. Microsatellites are an alternative approach as they are a rapid, simple, highly discriminative, and low-cost tool. Our research project was designed to obtain a panel of microsatellite targets for population genetic analyses to describe the genetic diversity of E. granulosus sensu stricto (s.s.) at the global to farm scale. A panel of five informative microsatellite loci for population genetic analysis of E. granulosus s.s. was developed and validated. A total of 145 isolates from 11 countries were used to evaluate the panel at the international level. Additionally, 131 samples from sheep and cattle across six regions in southern Italy were analyzed to assess the panel’s usefulness at both the regional and farm scale. Population genetics showed high genotypic diversity. Simpson’s index gave high values (0.94–0.98) for the expected heterozygosity (0.80 to 0.87). Discriminant analysis of principal components (DAPC) revealed the structure of populations for each country, with Greece distinctly distant from Algeria, Italy, and Tunisia. This was also confirmed by FST values. DAPC further revealed a genetic structure among the farms from the Italian regional sample set, with three different clusters explained by different farming practices. This microsatellite panel can provide data relevant for E. granulosus s.s. population genetics from global to farm scale, making it a low-cost, simple alternative to full mitochondrial genome sequencing for analyzing numerous samples and obtaining a detailed overview of genetic diversity, an input that is useful for cystic echinococcosis control programs
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    An Investigation of Embryo and Eggshell Development in Trichuris suis (Nematoda, Trichuridae) under Laboratory Conditions
    (2016-06-15) Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна ; Юськів, І. Д.; Melnychuk, V. V.; Мельничук, Віталій Васильович
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    Biological specifics of exogenous development of Oxyuris equi nematodes (Nematoda, Oxyuridae)
    (2020) Yevstafieva, V. O. ; Євстаф’єва, Валентина Олександрівна; Prykhodko, Y. О.; Kruchynenko, O. V. ; Кручиненко, Олег Вікторович; Mykhailiutenko, S. M.; Михайлютенко, Світлана Миколаївна; Kone, M. S. ; Коне, Мохамед Сумана; Кручиненко, Олег Вікторович
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    Chewing Lice (Order Mallophaga, Suborders Amblycera and Ischnocera) Fauna of Domestic Chicken (Gallus gallus domesticus) in Ukraine
    (2015-11-26) Євстаф’єва, Валентина Олександрівна ; Yevstafieva, V. O.
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    Comparative morphology and biology of nematodes of genus Heterakis (Nematoda, Heterakidae), parasites of the domestic goose (Anser anser) in Ukraine
    (2018-04-28) Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна ; Melnychuk, V. V.; Мельничук, Віталій Васильович ; Нікіфорова, О. В.; Супруненко, Костянтин Володимирович; Корчан, Леонід Миколайович; Локес-Крпука, Т.П.; Негребецький, Ігор Станіславович; Корчан, Микола Іванович; Suprunenko, K. V.
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    Current state of soil microbiota in the Zaporizhzhia region of Ukraine
    (2025) Melnychuk, V. V.; Мельничук, Віталій Васильович; Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна; Bilan, M.; Zazharskyi, V.; Zazharska, N.; Davydenko, P.; Plys, V.; Shapran, I.; Yakovenko, V.; Zamaziy, A. A.; Замазій, Андрій Анатолійович
    The destruction of the Kakhovka HPP led to large-scale changes in the natural ecosystems of the Zaporizhia and Kherson regions of Ukraine, including changes in the soil microbiome. The research in the territory of Zaporizhia Oblast revealed natural, intensive phenomena of soil cover purification from organic matter contamination, including feces, occurring in the drainage zone formed as a result of the destruction of the dam. Sanitary state control allows us to assess the safety of soils for the environment and determine the possible impact on humans. Thus, a local contamination was revealed. The sanitary state of the soil was characterized by the presence of sanitary indicator microorganisms (Escherichia coli, Enterococcus spp., Klebsiella spp., Enterobacter spp., Citrobacter spp., and Clostridium perfringens), which indicated fresh or old fecal contamination. The detection of thermophilic bacteria, Bacillus spp., and saprophytic fungi was correlated with the degree of organic matter transformation processes and stages of soil self-purification. In the soils in unsatisfactory sanitary condition, the coli titer the perfringens titer measured ≤ 0.9 and ≤ 0.009, respectively. Pathogenic Salmonella spp. were not detected in any of the soil samples, yet Mycobacterium spp. were isolated. In the soils of the drainage zone of most of the studied transects, the presence of E. coli and sulfite-reducing bacteria was established. The results obtained can be used for further monitoring and control of the sanitary condition of soils affected by the destruction of the Kakhovka HPP in order to prevent the spread of pathogenic microorganisms in natural ecosystems
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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
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    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
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    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
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    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.
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    Differential species traits of Trichostrongylus tenuis (Nematoda, Trichostrongylidae)
    (2020) Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна ; Стародуб, Євген Сергійович; Pysarenko, V. M.; Писаренко, Віктор Микитович; Barabolia, O. V.; Бараболя, Ольга Валеріївна; Нікіфорова, О. В.
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    Disinvasive activity of modern disinfectants against Ascaridia galli nematode eggs
    (2025) Melnychuk, V. V.; Мельничук, Віталій Васильович; Kovalenko, O.; Yevstafieva, V. O.; Євстаф’єва, Валентина Олександрівна; Zamaziy, A. A.; Замазій, Андрій Анатолійович; Dolhin, O. S.; Долгін, Олександр Сергійович
    Maintaining the well-being of poultry farms, increasing the number of birds, as well as enhancing their productivity depends on the implementation of therapeutic and preventive measures. Compliance with zoohygienic requirements and veterinary and sanitary rules for keeping chickens ensures veterinary well-being of farms, including with regard to nematodoses of the digestive tract. The aim of the research was to determine the disinvasive activity of modern disinfectants against eggs of the nematode Ascaridia galli, which parasitizes chickens. Under laboratory conditions, the destructive effect of domestically produced disinfectants was determined, including "Kristal-900" (active ingredients: glutaraldehyde, glyoxalaldehyde, benzalkonium chloride), "Creolin" (cresols, naphthalene, resin acids, pyridine bases and emulsifiers) and "Desirex Forte ParvoStop" (quaternary ammonium compounds, glutaraldehyde, non-inogenic surfactants) on a test culture of ascarid eggs isolated from the gonads of female nematodes. The conducted studies have established a high level of disinvasive effectiveness against A. galli nematode eggs of the following agents: "Krystal-900" – at 1.5 % concentration with exposure times of 1 h, 2 h and 3 h (90.3 %, 94.0 % and 100.0 % respectively); "Creolin" – at 4.0 % concentration for exposures of 2 and 3 h (92.9 and 100.0 % respectively) and at 5.0 % concentration for all exposure periods (100.0 %); "Desirex Forte ParvoStop" – at 0.5 % concentration with exposure times of 2 and 3 h (93.7 and 100.0 % respectively). Lower concentrations of the tested disinfectants, depending on the exposure duration, had either satisfactory or unsatisfactory levels of disinvasion efficiency against the eggs of the nematode A. galli. The destructive effect of disinfectants was accompanied by changes in the morphological structure of the eggs, which were characterized by the arrest of their development and loosening of the embryo; destruction and loosening of the eggshell, disintegration of both the embryo and shell, and larval death. The obtained research results allow us to recommend the disinfectants "Krystal-900", "Creolin" and "Desirex Forte ParvoStop" in specific application regimens for the effective control and prevention of ascaridiosis in chickens
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    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. І.; Фещенко, Д.
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    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
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    Effect of disinfectants on viability of Trichuris skrjabini eggs.
    (Regulatory Mechanisms in Biosystems, 2023-05-19) Yevstafieva, V. O. ; Petrenko, M. O. ; Peleno, R.; Nikiforova, O.; Vakulenko, Y. V.; Reshetylo, O.; Kone, M. S. ; Євстаф’єва, Валентина Олександрівна; Петренко, Максим Олександрович; Вакуленко, Юлія Валентинівна; Коне, Мохамед Сумана
    Effect of disinfectants on viability of Trichuris skrjabini eggs. trichurosis; sheep; embryogeneses; chemical preparations; ovocidal effect; disinfestation. The nematodoses are considered the most numerous group of cosmopolitan diseases among animal and human parasitoses. The representatives of the genus Trichuris attract special attention as pathogens of nematodoses. Their high fecundity, resistance to the influence of environmental factors and the ability to disperse create a serious ecological hazard and the risk of new outbreaks of infestation. The aim of the research was to establish the ovicidal efficiency of modern disinfectants on the embryogenesis of eggs of Trichuris skrjabini nematodes isolated from sheep. In laboratory conditions, two preparations were tested, DZPT-2 (mixture of glutaraldehyde, sodium dodecyl sulfate, essential oil) and Dixclor (mixture of sodium bisulfate, sodium chlorite, sodium percarbonate) at different concentrations and times of exposure. We established that DZPT-2 disinfectant showed a high level of ovicidal efficiency (97.5–100%) against T. skrjabini eggs at 4.5% concentration during exposure for 6–12 h and 5.0% concentration during exposure for 3–12 h. Dixclor showed a high level of ovicidal efficiency (100%) against Trichuris eggs at a concentration of 0.24% for exposures of 12 and 24 hours. Decreasing the concentration of disinfectants reduced the level of their ovicidal efficiency and led to the development of a greater number of viable eggs of T. skrjabini. Degenerative changes in the test cultures of T. skrjabini eggs caused by the tested disinfectants were characterized by the appearance and accumulation of air bubbles under the egg shell, the cessation of embryonic development at the bean-like embryo stage, loosening and resorption of the embryo inside the eggs, thinning and destruction of their shell, deformation of the eggs, and swelling of the egg plugs. Such destructive changes in eggs in experimental test cultures were also confirmed by the indicators of their morphometric parameters. Under the influence of DZPT-2 and Dixclor on the 54th day of cultivation, the length of the eggs was lower by 3.9%, and their width was greater by 4.8–5.1% compared to similar indicators in the control test culture. The obtained results allow one to recommend the tested disinfectants in defined and effective concentrations and exposures for effective control and prevention of trichurosis on livestock farms.
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    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
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    Effectiveness of the application of an improved method of laboratory coproscopic diagnostics of toxocarosis in dogs
    (2025) Melnychuk, V. V.; Yevstafieva, V. O.; Kitichenko, A.; Євстаф’єва, Валентина Олександрівна; Мельничук, Віталій Васильович; Кітіченко, А. С.
    Toxocara canis is a nematode that causes toxocarosis in dogs, which has zoonotic potential. T. canis larvae are transmitted transplacentally from females to newborn puppies and, after a complex hepatopulmonary migration, develop into sexually mature helminths in the small intestine. In young and adult dogs, after alimentary ingestion of parasite eggs, larvae hatch, migrate to skeletal muscles, kidneys, liver and heart and persist for years as somatic larvae. Somatic larvae in the tissues of females are activated during pregnancy and are a reservoir of invasion
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    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
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    Efficacy of ultrasound in diagnosis of dirofilariasis in dogs caused by Dirofilaria immitis
    (2022-11) Yevstafieva, V. O. ; Євстаф’єва, Валентина Олександрівна; Kryvoruchenko, D. O.; Melnychuk, V. V. ; Мельничук, Віталій Васильович; Nikiforova, O.; Kone, M. S. ; Коне, Мохамед Сумана; Barabolia, O. V.; Бараболя, Ольга Валеріївна
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    Epizootological monitoring studies of chicken heterakosis spreading on the territory of Poltava region
    (2023) Євстаф’єва, Валентина Олександрівна; Омельченко, Ольга Вікторівна; 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