Yuriy Kuzmin

National Academy of Sciences of Ukraine | ISP · Department of Parasitology

The aim of this study was to assess the changes in strongylid communities of domestic horses after two decades of regular anthelmintic treatments; the changes in prevalence and relative abundance of individual strongylid species and their contribution to the observed alterations were estimated. The study was conducted in 2023; data collected in 200...

Two new species of lung-dwelling nematodes are described from North American frogs: Rhabdias aurorae n. sp. from Rana aurora and Rhabdias conni n. sp. from Rana clamitans and Rana catesbeiana from Arkansas; the latter species was also found in Oklahoma and Georgia. Rhabdias aurorae n. sp. differs from other Nearctic congeners in the combination of...

Background Only a few comprehensive studies have been carried out on parasites in amphibians and reptiles in Ukraine. This has resulted in identifying over 100 helminth species across these vertebrate groups. However, most of the studies were performed in the 20th century and the taxonomy of many parasites and their hosts has changed ever since, in...

Nematodes of the genus Cosmocerca are commonly found in various amphibians in South Africa and in most cases are identified as C. ornata. However, after detailed morphological studies and molecular approaches, three new species of the genus were recently described from three different frogs in South Africa. In present study, we describe another new...

У результаті попередніх досліджень гельмінтофауни Ржищівської МОТГ було виявлено у 2 фонових видів амфібій (групи бурих жаб (Ranidae)) 4 види гельмінтів. З них більшість представляли нематоди родів Rhabdias (29,82 %), Oxysomatium (64,91 %) та Oswaldocruzia (1,75 %). Також було зареєстровано два випадки виявлення моногеней Polystoma (3,51 %). Загаль...

Icosiella neglecta (Diesing, 1851) is a filarial nematode infecting anuran amphibians in the western Palaearctic. In the present survey, we found I. neglecta in 27 out of 28 localities in eight regions of Ukraine. In those localities, 56.5 % of sampled green frogs (Pelophylax esculentus complex) were infected. The infection prevalence was similar i...

Patterns of the rockcod Notothenia coriiceps infection with helminths were analysed to understand the dynamics of parasite communities in this Antarctic fish and to test their stability over time. The study was performed using helminth samples collected from 183 N. coriiceps in 2014–2015 and 2020–2021 in the vicinity of the Ukrainian Antarctic stat...

Observations of wintering rook populations were carried out from late October till early March in 2020–2021 and 2021–2022 in the cities of Poltava and Kyiv. In Poltava, rooks made up 95 % of the approximately 50,000 wintering corvids, and in Kyiv, more than 93% of the approximately 90,000 corvids. Up to 10 % of the rooks observed in Poltava were ju...

In the present review, we summarised the information on helminths of 14 species of wild carnivorans (a total of 260 individuals examined) from Ukraine based on an investigation of collection materials. Additionally, helminths of the domestic dog, Canis familiaris L. (n = 73) and domestic cat, Felis catus L. (n = 11) were reviewed. Helminth species...

Patterns of the rockcod Notothenia coriiceps infection with helminths were analysed to understand the dynamics of helminth communities in Antarctic fish and to test their stability over time. The study was performed using helminth samples (30,951 specimens in total) collected from 183 N. coriiceps in 2014–2015 and 2020–2021 in the vicinity of the U...

Helminth community of the Antarctic black rockcod, Notothenia coriiceps, was examined using the fish samples collected in 2014—2015 (106 specimens) and 2020—2021 (78 specimens) in the water area of the Argentine Islands, West Antarctica. In total, 30,951 helminth specimens were collected and identified. We analyse the helminth infra- and component...

Three new species of lung-dwelling nematodes are described from the frogs Ptychadena anchietae (Bocage), P. oxyrhynchus (Smith), and P. uzungwensis (Loveridge) in southern Africa. All three species are medium-sized species of Rhabdias Stiles et Hassall, 1905, with the thick-walled buccal capsules measuring 11–13 μm × 6–11 μm, consisting of longer a...

Helminths of 12 fish species collected near the South Orkney Islands, West Antarctica were studied. In the whole sample of 115 fish specimens, we identified one species of Monogenea, 5 species of Trematoda, 4 species of Cestoda, 5 species of Nematoda, and 7 species of Acanthocephala. All cestode species, 3 species of nematodes, and 5 species of aca...

Serpentirhabdias mamlambo n. sp. is described from the lung of the herald snake, Crotaphopeltis hotamboeia (Laurenti) in KwaZulu-Natal Province, South Africa. The new species is characterised by the small lips, the absence of the buccal capsule, the large excretory glands (1.5–2.3 times longer than the oesophagus), and the numerous eggs in uteri. S...

PurposeAnalysis and comparison of the helminth assemblages in Antarctic rockcod Notothenia coriiceps collected near the UAS “Akademik Vernadsky” (Argentine Islands, West Antarctica) in 2002 and 2014–2015 were performed to characterise the parasite community and investigate the temporal changes in helminth assemblages and infection parameters.Method...

Purpose: The Antarctic dragonfish, Parachaenichthys charcoti is a notothenioid teleost fish endemic to the Southern Ocean surrounding Antarctica. It is a relatively rare fish species; therefore, published data on the parasite communities of P. charcoti are limited. The present study was performed on the Ukrainian Antarctic Station "Akademik Vernad...

Monitoring studies of the species diversity in marine ecosystems provide important data on ecological changes caused by global warming and anthropogenic influence. The present work was aimed to analyze the species diversity of the helminths parasitic in teleost fishes inhabiting the area near the Ukrainian Antarctic Station “Akademik Vernadsky” (Ga...

The genus Neofoleyellides was recently erected for a single species, Neofoleyellides boerewors from bufonid hosts in South Africa. In present study, we discovered two undescribed species of Neofoleyellides, namely N. steyni n. sp. and N. martini n. sp. parasitising frogs Amietia delalandii and Leptopelis natalensis, respectively. Both species diffe...

The northern fur seal (NFS), Callorhinus ursinus (Mammalia: Otariidae), is a marine mammal species included into the IUCN Red List as the vulnerable species which population is dramatically declining. A significant amount of parasitological data collected previously and our recent data allowed us to clarify the list of NFS metazoan parasites and to...

Nematodes of the genus Amphibiophilus Skrjabin, 1916 are a small group of parasites restricted to pyxicephalid frogs in southern Africa. In the present study, the new species A. bialatus parasitising the clicking stream frog Strongylopus grayii (Smith) as well as two forms parasitising the common river frog Amietia delalandii (Duméril & Bibron) fro...

Rhabdias delangei n. sp. (Nematoda: Rhabdiasidae) is described from the lungs of the clicking stream frog Strongylopus grayii (Smith) in the Western Cape Province of South Africa. The new species is characterised by the nerve-ring being located just posterior to the mid-length of the oesophagus, a pre-equatorial vulva, as well as a thin-walled and...

The article presents the records and brief descriptions of trematodes Brachylaima fuscata (Rudolphi, 1819), Prosthogonimus cuneatus (Rudolphi, 1809), Prosthogonimus ovatus (Rudolphi, 1803), and a nematode Cardiofilaria pavlovskyi Ström, 1937 based on the specimens collected from four corncrakes, Crex crex Linnaeus examined on the territory of Ukrai...

PurposeThe study aims to characterise and compare the helminth assemblages and helminth infracommunities in the marsh frog, Pelophylax ridibundus and the edible frog, P. esculentus collected in the northern part of Ukraine.Methods Occurrence and abundance of the helminths were analysed by calculating the prevalence, intensity, and mean abundance of...

Codonocephalus is a monotypic genus of diplostomid digeneans and is the only genus in the subfamily Codonocephalinae. The type-species Codonocephalus urniger has an unusual progenetic metacercaria that uses frogs as intermediate hosts and can use snakes as paratenic hosts. Adult C. urniger parasitize ardeid wading birds in the Palearctic. Despite t...

Codonocephalus is a monotypic genus of diplostomid digeneans and is the only genus in the sub-family Codonocephalinae. The type-species Codonocephalus urniger has an unusual progenetic metacercaria that uses frogs as intermediate hosts and can use snakes as paratenic hosts. Adult C. urniger parasitize ardeid wading birds in the Palearctic. Despite...

Serpentirhabdias mussuranae n. sp. is described from the lungs of the mussurana, Clelia clelia (Daudin, 1803), from vicinities of Lábrea, Amazonas State, Brazil. The species is characterized by the triangular oral opening, the presence of teeth (onchia) in the oesophastome, the excretory glands longer than the oesophagus and the tail abruptly narro...

The genus Rhabdias Stiles & Hassal, 1905 includes about 83 species of nematodes parasitic in amphibians and reptiles worldwide. Herein, we describe Rhabdias glaurungi sp. nov. from the hylid frog Scinax gr. ruber (Laurenti, 1768) in the Gunma Ecological Park, Santa Bárbara municipality, state of Pará, Brazil. This species has six small lips, an inf...

A new species of the genus Serpentirhabdias Tkach, Kuzmin et Snyder, 2014, S. moi n. sp., is described from a colubroid snake Chironius exoletus from Caxiuanã National Forest, State of Pará, Brazil. The species is characterised by having a triangular oral opening, absence of the buccal capsule, presence of six minute onchia in the oesophastome, and...

Rhabdias picardiae previously known from the Guttural Toad, Sclerophrys gutturalis (Bufonidae) is described from a new host, Delaland’s River Frog, Amietia delalandii (Pyxicephalidae). The species identification is confirmed by analysis of the COI gene sequence and morphological comparison with the original description. Morphological details of api...

The lung-dwelling nematode Rhabdias engelbrechti sp. n. was found in five of eight examined banded rubber frogs in Limpopo Province, South Africa. The species is differentiated from species of Rhabdias Stiles et Hassall, 1905 occurring in the Afrotropical Realm based on the presence of a globular cuticular inflation at the anterior end, the buccal...

We examined the helminth communities in three separate populations of P. ridibundus within Kyiv Oblast in Ukraine. Studied populations inhabit moderately urbanised biotopes near or within the human settlements in three localities. Helminth communities of P. ridibundus in moderately urbanised biotopes were similar in three studied host populations i...

Nematodes comprise the biggest component (over 70 %) in helminth communities of African amphibians; however, there are only 24 species reported from fewer than 40 species of amphibians in South Africa. In the helminthological material collected from 103 specimens of Amietophrynus gutturalis (Power, 1927), 26 Amietia delalandii (Boulenger, 1895) and...

The article summarizes information on the nematodes parasitic in wild Carnivora of Ukraine. Totally, 50 species of nematodes are known to parasitise carnivorans in the country, 30 species were registered in the present study. Nematodes were found in 14 species of examined hosts from the families Canidae, Mustelidae and Felidae. Maximum diversity of...

The results of the study of various external morphological anomalies occurrence in 3 populations of marsh frogs of various distances from the city center of Kyiv, in association with the study of the representation of different ecological groups of helminths are presented in this paper. The purpose of this approach to the study was repeated referen...

First Record of Dicheilonema ciconiae (Nematoda, Diplotriaenoidea) from Ciconia nigra (Aves, Ciconiidae) in Ukraine. Syrota, Ya. Yu., Kuzmin, Yu. I., Lyaskivskiy, V. N., Kobylinsky, V. V., Vasylkivska, I. B. — Five specimens of a parasitic nematode Dicheilonema ciconiae (Schrank, 1788) were collected from black stork, Ciconia nigra Linnaeus, in Kyi...

Two new lung-dwelling nematode species of the genus Rhabdias Stiles et Hassall, 1905 were discovered in Caxiuanã National Forest, Pará state, Brazil. Rhabdias galactonoti sp. n. was found in a dendrobatid frog Adelphobates galactonotus (Steindachner). The species is characterised by the regularly folded inner surface of the anterior part of the buc...

Rhabdias paraensis Santos, Melo, Nascimento, Nascimento, Giese et Furtado, 2011 was described based on fully gravid worms. Further investigations on the free-living stages, immature worms and young individuals were facilitated by cultivation in the laboratory, which allowed us to add new information about the morphology and development of the speci...

A new lung-dwelling nematode species is described from the common lancehead Bothrops atrox (Linnaeus) in the Brazilian Amazon Region. The species is assigned to the genus Serpentirhabdias Tkach, Kuzmin & Snyder, 2014 based on the presence of six lips arranged in two lateral groups, the absence of prominent cuticular inflations, and lung parasitism...

Author Summary Filariae are predominantly tissue-dwelling nematodes of the Onchocercidae (Spirurida). They are parasites of terrestrial vertebrates and some of them are particularly well known as agents of human diseases in tropical environments (e.g. onchocercosis, lymphatic filariosis, loaosis). Because of their predilection for host tissue sites...

Based on material collected from Rhinella cf. margaritifera (Laurenti) and Rhi. marina (Linnaeus) (Anura: Bufonidae) during a parasite survey of the herpetofauna of French Guiana, updated descriptions of Rhabdias androgyna Kloss, 1971 and R. fuelleborni Travassos, 1926 are presented. In addition to metrical data, which may overlap in closely relate...

A new species of hookworm, Uncinaria lyonsi n. sp., is described based on morphological studies of the nematodes collected by Dr. E. T. Lyons from the California sea lion Zalophus californianus (Lesson) on San Miguel Island, California, USA. The new species is morphologically similar to three other species of the genus Uncinaria Frölich, 1789 paras...

Serpentirhabdias atracti n. sp. is described based on specimens discovered in the lung of Atractus major Boulenger from Caxiuanã National Forest, Pará, Brazil. The new species is assigned to Serpentirhabdias Tkach, Kuzmin & Snyder, 2014 based on morphological characters (comparatively thin body cuticle without prominent inflations, arrangement of c...

BACKGROUND: Parasitological perspectives in biodiversity inventories provide powerful insights into the history, structure, and maintenance of the biosphere. METHODS: We collected 101 individuals of the Pelophylax esculentus complex (Ranidae) in 2012 and 2013 from sites associated with flowing water, a fish pond system and a wetland marsh system. R...

The genus Entomelas Travassos, 1930 currently includes nine species of rhabdiasid nematodes, eight of them parasitic in lizards and only one, Entomelas sylvestris Baker, 1982, parasitic in amphibians. Entomelas sylvestris was originally described from the Forest Rain Frog Breviceps sylvestris FitzSimons in South Africa and was not reported since. I...

The morphology of infective third-stage larvae of Rhabdias bufonis, R. rubrovenosa, R. sphaerocephala, R. fuscovenosa, R. elaphe, Entomelas entomelas and E. dujardini is described. The sheath structure in the studied larvae appeared to be similar to that described in other species of the family Rhabdiasidae, its chequered aspect being caused by a c...

Rhabdiasidae Railliet, 1915 is a globally distributed group of up to 100 known species of nematodes parasitic in amphibians and reptiles. This work presents the results of a molecular phylogenetic analysis of 36 species of Rhabdiasidae from reptiles and amphibians from six continents. New DNA sequences encompassing partial 18S rDNA, ITS1, 5.8S rDNA...

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Rhabdias blommersiae sp. n. (Nematoda: Rhabdiasidae) is described from the lungs of Domergue's Madagascar frog, Blommersia domerguei (Guibé) (Amphibia: Mantellidae), in Madagascar. The new species differs from congeners parasitizing amphibians in having a smaller body and buccal capsule, six equal lips, large excretory glands of unequal length and...

The filarial onchocercid Setaria graberi Shoho in Troncy, Graber & Thal, 1976 is redescribed from the abdominal cavity of Southern reedbuck, Redunca arundinum (Boddaert), in South Africa, including illustrations and scanning electron micrographs of important morphological features. Morphometric data for this species are provided for the first time....

Kalicephalus burseyi n. sp. (Nematoda: Diaphanocephalidae) is described from a snake, Oxyrhabdium leporinum, on Luzon Island, Philippines. Unequal spicule length places the new species in the subgenus Kalicephaloides, which also includes Kalicephaloides bungari, Kalicephaloides longispicularis, and Kalicephaloides alatospiculus. Kalicephalus bursey...

Studies of northern fur seal (Callorhinus ursinus Linnaeus, 1758) infection by the filariid nematode Acanthocheilonema odendhali were carried out in 2011-2012 on St. Paul Island, Pribilof Archipelago, Alaska. Skins of 502 humanely harvested northern fur seals from haul-out areas of five rookeries, Polovina (n = 122), Morjovi (n = 54), Zapadni (n =...

The review deals with the species of Rhabdiasidae Railliet, 1915 occurring in the Holarctic. Descriptions of 26 species from the genera Rhabdias Stiles et Hassal, 1905 (21 species), Entomelas Travassos, 1930 (4 species), and KurolonemaSzczerbak et Sharpilo, 1969 (1 species) are presented. Additionally, 5 species of Rhabdias are listed as species in...