Toxocariasis and toxascariasis in wild felids of southwestern Primorsky Krai
DOI:
https://doi.org/10.33910/2686-9519-2025-17-1-117-145Keywords:
Amur tiger, Far Eastern leopard, Amur forest cat, Korean field mouse, striped field mouse, toxocariasis, toxascariasis, ascariasis, intermediate hostAbstract
Long-term parasitological studies in southwestern Primorsky Krai reveal near-identical helminth communities in the Amur tiger and Far Eastern leopard, with Toxocara cati representing the dominant parasite species, albeit with fluctuating prevalence rates. We provide morphological characterization of fourth-stage larvae for both T. leonina and T. cati, along with developmental observations of T. leonina to adulthood. During 2018 summer surveys in protected areas, cyst-encapsulated third-stage larvae morphologically and morphometrically consistent with T. cati and T. leonina were identified in the hepatic serosa of two rodent species serving as intermediate hosts: the Korean field mouse and striped field mouse. The paper provides a morphological description of the larvae. Epidemiological analysis demonstrates that Amur tigers and Far Eastern leopards acquire toxascariasis primarily during peak rodent population cycles (from 3 to 4 year intervals), while the Amur forest cat maintains persistent toxocariasis infections throughout its lifespan.
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