The gastro-intestinal parasites community of the Przewalski’s horse, Equus przewalskii Poljakov, 1881, and the domestic horse in the Chernobyl exclusion zone.

The research article examines the types and quantities of gut parasites found in Przewalski’s horses and domestic horses in the Chernobyl exclusion zone, 18 years after the nuclear disaster. The team found differences in the types of parasites in each horse species, suggesting that the Przewalski’s horses have maintained their natural high resistance to parasitic infections.

Overview of the Study

• This study aimed to investigate the community of gastro-intestinal parasites in Przewalski’s horses (a breed that is free-living in the Chernobyl exclusion zone of Ukraine) and domestic horses held in stables.
• The deworming diagnostics was conducted eighteen years after the Chernobyl nuclear disaster in order to examine the after-effects on biological communities in the region.
• The findings of this research might justify the use of Przewalski horses in the re-naturalization of areas affected by ecological disasters.

Findings

• Through the study, they were able to identify 31 species of parasites which belonged to 5 families and 3 classes, including 28 nematodes, one cestode species, and two botfly larvae.
• The Przewalski horses harbored 29 species of helmith parasites, while only 19 were found in the domestic horses.
• Only six helmith species were common to both types of horses, indicating a difference in the parasite communities of the two species.
• Parasite species from the family Strongylidae were the most common in both types of horses.
• Four cyathostomine species were dominant in both the Przewalski and domestic horses. They were: Cyathostomum catinatum, Cylicostephanus minutes, C. longibursatus, and Cylicocyclus nassatus.

Significance of the Findings

• These findings demonstrate that, even after a major ecological disaster, Przewalski’s horses have managed to retain their biological features and strong resistance to parasitic infections.
• In addition to showing low levels of parasitic infection, these horses were also found to be in good clinical health with substantial herd growth.
• This information is valuable in supporting the idea that Przewalski horses could be beneficial in restoring and revitalizing areas affected by ecological disasters.

Conclusions

• This study provided important insights into how free-living horse species cope in an environment severely affected by a nuclear disaster.
• The findings suggest that Przewalski’s horses maintain their health and biological defenses against parasites, and could potentially be used for re-introducing life in disaster-stricken areas.