Bulletin "Veterinary biotechnology"

Veterynarna biotehnologija – Veterinary biotechnology, 2020, 36, 138-145 [in Ukrainian]. https://doi.org/10.31073/vet_biotech36-14

NIKIFOROVA O., e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., PRYKHODKO Yu., e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., MAZANNYІ O., e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., FEDOROVA H., e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., LYULIN P., e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Kharkiv State Zooveterinary Academy

RESHETILO O., e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Sumy National Agrarian University

SPECIES COMPOSITION AND EPIZOOTOLOGICAL ASPECTS OF INTESTINAL NEMATODOSES OF HORSES OF KHARKIV OBLAST

Introduction. Horse breeding is one of the important livestock industries of Ukraine's agro-industrial complex. Horses are keeping for participating in sports competitions, used for hippotherapy and for work purposes. Parasitic diseases of horses lead to reduced working efficiency, loss of breeding qualities, and a high level of infestation, may cause the death of horses, especially young animals.

The goal of the work – to study the species composition and some epizootological aspects of intestinal nematodoses of horses of the Eastern region of Ukraine.

Materials and methods. In 2015–2019 individual samples of faeces of 386 horses aged from 6 months to 26 years from six private equestrian farms of the Kharkiv region Ukraine were tested. Experimental animals were kept in a stable, received a balanced diet, deworming was carried out quarterly, regularly participated in national and international equestrian competitions. Samples of faeces have investigated by the standard flotation method using saturated solution of sodium chloride with the establishment of extensity and intensity of invasion (EI, II) in the scientific laboratory of the Parasitology Department of Kharkiv State Zooveterinary Academy. Identification of helminth eggs was carried out using the atlases by Cherepanova A.A., Thienpont D., pictures of eggs were took using a Carl Zeiss microscope (×100) and a Canon PowerShot camera.

Results of research and discussion. During 2015–2019 in 140 horses eggs of Parascaris equorum, nematodes eggs of family Strongylidae, and eggs of Strongyloides westeri were detected. The intensity of invasion was 36.27%. Mono-invasions caused by nematodes of family Strongylidae were recorded more frequently (EI = 31.35%), mono-invasions were detected less often caused by Parascaris equorum (EI = 2.07%). Mixtinvasions were found in the pathogens association: nematodes of family Strongylidae and Parascaris equorum (EI = 2.59%) and nematodes of family Strongylidae and Strongyloides westeri (EI = 0.26%). Strongylidoses of digestive tract of horses recorded more frequently (75.21%) in the low invasion intensity that is indicating on animals as pathogen carriers. Most often horses suffered from intestinal nematodes at the aged 1 to 5 years (EI = 48.56%, II – 11.50±2.25 eggs in the field of view of microscope). Foals at the age up to one year old got sick less often (EI = 27.14%) but with a higher degree of II – 15.62±2.30 eggs in the field of view of microscope. In 20.83% of horses older 10 years intestinal nematodes were found with II – 4.92±0.84 eggs in the field of view of microscope.

Conclusions and prospects for further research. In equine farms of the Kharkiv region intestinal nematodes of horses caused by pathogens of the family Strongylidae, Parascaris equorum, Strongyloides westeri, the prevalence was 36.27%. Mono-invasions were more often represented by nematodes of the family Strongylidae (EI = 31.35%), less frequently by the species Parascaris equorum (EI = 2.07%). Most often horses suffered from intestinal nematodes at the aged 1 to 5 years (EI = 48.56%). Foals at the age up to one year old got sick less often (EI = 27.14%).

In the future, to continue monitoring studies on the intestinal nematodes of horses and other one-hoofed animals, to analyze the dependence of infestation of animals with intestinal nematodes on the season and to establish the species composition of the strongylid.

Keywords: horses, nematodes, Parascaris equorum, Strongyloides westeri, Strongylus spp.

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