Infection of Dice Snake (Reptilia, Colubridae) with Larvae of Eustrongylides excisus (Nematoda, Dioctophymatidae) in the Middle and Lower Dnipro River Basin

Yermolenko, S. V.; Gasso, V. Y.; Hahut, A. M.; Spirina, V. A.

doi:10.15407/zoo2022.04.341

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…People have long been using the resource potential of the deltas to develop industry, transport, agricultural and fishing economies, for recreation, etc. (Yermolenko et al, 2022;Yesipova et al, 2022). Over the recent decades, special attention was paid to complex studies of delta ecosystems, and currently the focus is on the control of anthropogenic impact and quality of ecosystem services.…”

Section: Introductionmentioning

confidence: 99%

Impact of hydrotechnical construction on aquatic ecosystems of the Kiliia branch of the Danube Delta

et al. 2022

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Resumption of shipping in the Bystryi branch in the Ukrainian part of the Danube Delta, one of the largest aquatic-wetland areas of Europe and the world, has made it necessary to control the anthropogenic impact on the neighboring water areas of the Danube Biosphere Reserve. The objective of the study was comparing the compositions and structure of phytoplankton, microphytobenthos, macrophytes, benthic invertebrates and ichthyofauna of the mouth area of the Bystryi branch with such communities of the mouths of the branches Vostochnyi, Tsyhanka and Starostambulskyi, which are situated in the protected zone and characterized by limited anthropogenic activity. We also determined the correspondence of the descriptors of biotic groups to the categories of the ecological status according to the Water Framework Directive of the EU. The studies were performed in the autumn and summer periods in 2020–2021. We recorded 367 species of animals and plants, the richest biodiversity was seen for the biota of the Bystryi branch – 250 species, and 180–231 species of hydrobionts were found in the undisturbed mouths. We determined 25.3% of shared species for the water areas, and therefore high values of similarity of the species compositions according to Bray-Curtis (47.5% to 81.5%). We determined no significant differences between the groups of the mouths of the examined branches according to most indicators of taxonomic and ecological structure. As the descriptors of ecological status, we chose assemblage indices of phytoplankton and microphytobenthos, which are based on ratios of biomass of functional groups of algae, and also the Macrophyte Biological Index for Rivers, saprobic index of Zelinka & Marvan and Biological Monitoring Working Party Index of Benthic Invertebrates and Representation of Species of Ichthyfauna according to vulnerability to actions of environmental factors. We determined that the range of descriptors of phytoplankton and microphytobenthos corresponded to the “high” ecological status category, such of macrophytes and benthic invertebrates to “good”, and such of ichthyofauna varied “high” to “good”. In general, all the mouth areas were characterized by “good” ecological status. Similarities of the species composition and the structure of biotic communities of the mouths of the studied branches of the delta indicate the absence of negative impact of the deepwater shipping on adjacent ecosystems, which may be related to the peculiarities of reactions of groups in the water areas with natural stress, as well as local impact of the hydrotechnical construction.

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Section: Introductionmentioning

confidence: 99%

Impact of hydrotechnical construction on aquatic ecosystems of the Kiliia branch of the Danube Delta

et al. 2022

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“…The basis of dirofilariasis diagnostics consists of complex analysis of epizootiological data, clinical symptoms, pathoanatomic changes, and results of laboratory tests (Strickland, 1998;Hoch & Strickland, 2008;Romano et al, 2021;Yermolenko et al, 2022). In particular, hemolarvascopy is used, which is based on blood testing via several methods of different efficacy, which can be ineffective in case of presence of immature nematodes in the organism of the definitive host (Magnis et al, 2013;Ionica et al, 2017;Genchi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Efficacy of ultrasound in diagnosis of dirofilariasis in dogs caused by Dirofilaria immitis

Євстаф’єва

Kryvoruchenko

Melnychuk

et al. 2022

Regul. Mech. Biosyst.

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Ultrasonic diagnostics is a modern and effective method of laboratory testing of both animals and humans, used for estimation of overall state, and for detection of different pathologies in organs and systems. The aim of the present study was to establish the efficacy of ultrasonic diagnostics of dog dirofilariasis caused by Dirofilaria immitis parasitism, based on several indexes of invasion intensity. It was established that the number of D. immitis helminths found depended on the intensity indexes of microdirafilariasis invasion: using echocardiography, there were no helminths found under the index lower than 40 larvae/cm3. Under the index higher than that, we visualized 1–10 parasite individuals in the cavity of the right ventricle and right atrium, and at the tricuspid valve leaflets. It was established by the results of echocardiography of dogs invaded by D. immitis that the level of invasion intensity impacts significantly on the animals’ heart structure and function, and on their intracardiac hemodynamics. It was proved that under increase of microfilaria number in the blood, heart function deteriorates. Under the invasion intensity lower than 40 larvae/cm3, the changes were characterized by a slight increase in thickness of the posterior wall of the left ventricle in diastole, aorta diameter, left atrium and pulmonary artery (by 6.2%). Under the invasion intensity of 40–60 larvae/cm3, the deterioration in heart structure and function was followed by thickening of the interventricular septum in diastole, posterior wall of the left ventricle in diastole (by 5.6%), increase in ejection fraction index (by 7.0%), widening of aorta root, pulmonary artery, diameter of the left ventricle (by 21.4%), and with increase in indexes of ratio between diameters of the left ventricle and pulmonary artery, and aorta (by 15.6%). Signs of hemodynamic deterioration were established in sick animals, which was characterized by increase of blood speed in the tricuspid valve (by 33.7%), and its decrease in the pulmonary artery (14.1%). Under the invasion intensity higher than 60 larvae/cm3, the aforementioned indexes changed even more significantly. We observed thickening of the posterior wall of the right ventricle in diastole, decrease of the end-systolic size of the left ventricle (by 13.0%), blood speed increase in the aorta and mitral valve (by 12.2%). The obtained results show the necessity of echocardiographic testing of dogs with cardiac dirofilariasis, which allows effective proof of the diagnosis and also helps to understand the overall state of the animal more deeply and to provide it with the appropriate symptomatic cure.

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Infection of Dice Snake (Reptilia, Colubridae) with Larvae of Eustrongylides excisus (Nematoda, Dioctophymatidae) in the Middle and Lower Dnipro River Basin

Cited by 2 publications

References 21 publications

Impact of hydrotechnical construction on aquatic ecosystems of the Kiliia branch of the Danube Delta

Impact of hydrotechnical construction on aquatic ecosystems of the Kiliia branch of the Danube Delta

Efficacy of ultrasound in diagnosis of dirofilariasis in dogs caused by Dirofilaria immitis

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