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Berezina, Nadezhda A.; Strelnikova, A. P.

doi:10.1023/a:1016652923231

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…As regard the fish size, the negative correlation between body size and Eustrongylides spp. infection in P. fluviatilis may be due to the feeding habit of juvenile perch [10], which feed mainly on zooplankton and benthic invertebrates (i.e., oligochaetes), while adults feed on macroinvertebrates and other fish [42][43][44]. Based on our data we could hypothesize that the high prevalence in young perch possibly results from feeding on infected oligochaetes.…”

Section: Discussionmentioning

confidence: 68%

Could Fish Feeding Behaviour and Size Explain Prevalence Differences of the Nematode Eustrongylides excisus among Species? The Case Study of Lake Garda

Menconi

Tedesco²,

Pastorino

et al. 2021

Water

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The nematode Eustrongylides excisus is a parasite of freshwater fish- and fish-eating birds, with known differences on prevalence values among fish species. Thus, the present study aims to explore the hypothesis that the feeding behavior and the size of fish belonging to different trophic levels could explain such differences. For that, 14 sampling sites were selected to perform a fish parasitological survey on Lake Garda (Italy) during spring-summer 2020. Amplification of nuclear ribosomal internal transcribed spacer (ITS) rDNA sequences of nematodes morphologically ascribable to the genus Eustrongylides allowed to identify them as E. excisus. From the five studied fish species (Perca fluviatilis, Lepomis gibbous, Coregonus lavaretus, Alosa fallax lacustris and Micropterus salmoides), only three presented the parasite E. excisus: P. fluviatilis, L. gibbous and M. salmoides, with significant differences in prevalence values among species (p = 0.002). Additionally, there were differences in prevalence values within the same fish species captured from different sampling sites. Findings showed that mainly piscivorous fish were positive for E. excisus and how the prevalence was highest in M. salmoides. As regard the fish size, a negative correlation between body size and E. excisus was found in P. fluviatilis due to the feeding habit of juvenile perch which feed mainly zooplankton and benthic invertebrates (i.e., oligochaetes, which are the first intermediate hosts of E. excisus). The study findings advance novel knowledge in the field of pathogens of zoonotic importance in the aquatic environment.

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Section: Discussionmentioning

confidence: 68%

Could Fish Feeding Behaviour and Size Explain Prevalence Differences of the Nematode Eustrongylides excisus among Species? The Case Study of Lake Garda

Menconi

Tedesco²,

Pastorino

et al. 2021

Water

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“…Early stages of the fish are more susceptible to Eustrongylidosis as they primarily consume zooplankton and benthic invertebrates (i.e., oligochaetes, which serve as the initial intermediate hosts of E. excisus ). Whereas adults have a preference for consuming macroinvertebrates [ 47 ]. Furthermore, piscivorous fish species exhibit a higher susceptibility to infection compared to non-piscivorous fish species [ 26 , 35 ].…”

Section: Discussionmentioning

confidence: 99%

Histopathological, morphological, and molecular characterization of fish-borne zoonotic parasite Eustrongylides Excisus infecting Northern pike (Esox lucius) in Iran

Rahmati-Holasoo,

Azizzadeh,

Ebrahimzadeh Mousavi

et al. 2024

BMC Vet Res

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Eustrongylides excisus is a fish-borne zoonotic parasite known to infect various fish species, including Northern pike (Esox Lucius). This nematode, belonging to the family Dioctophymatidae, has a complex life cycle involving multiple hosts. This study aimed to investigate the occurrence of Eustrongylides nematodes in Northern pike (E. Lucius) collected from Mijran Dam (Ramsar, Iran). Between June and October 2023, an investigation was conducted on Northern pike from Mijran Dam in Ramsar, Iran, following reports of reddish parasites in their muscle tissues. Sixty fish were examined at the University of Tehran, revealing live parasites in the muscles, which were then analyzed microscopically and preserved for a multidisciplinary study. The skeletal muscle tissues of 85% (51/60) of fish specimens were infected by grossly visible larvae which were microscopically identified as Eustrongylides spp. In histopathological examination, the lesion was composed of encapsulated parasitic granulomatous myositis. Microscopically, the cystic parasitic granulomas compressed the adjacent muscle fibers, leading to their atrophy and Zenker’s necrosis. Moreover, epithelioid macrophages, giant cells and mononuclear inflammatory cells were present around the larvae and between the muscle fibers. Finally, a molecular analysis by examining the ITS gene region, revealed that they belong to the species E. excisus. Eustrongylidiasis in northern Iran necessitates further research into the biology, epidemiology, and control of Eustrongylides nematodes, focusing on various hosts. This study is the first to comprehensively characterize E. excisus in Northern pike in Ramsar, Iran, raising concerns about possible zoonotic transmission.

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