First Record of Eustrongylides excisus (Dorylaimea: Dioctophymatidae) in Fish of the Rybinsk Reservoir

Zhokhov, A. E.; Pugacheva, M. N.

doi:10.1134/s207511171904012x

Cited by 4 publications

(2 citation statements)

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“…larvae may be found in muscles of the host fish. In relation to Eustrongylides sp., the main larvae infection site is the musculature of the fish (Barros et al, 2004;Branciari et al, 2016;Melo et al, 2016;Zhokhov & Pugacheva, 2019) This is the perfect location for a fish-borne zoonotic nematode, which fundamentally depends on the localization of the infective larvae (i.e., it should be in edible sites) but also, again, on the habit of eating raw or undercooked fish (Cavallero et al, 2018;Eiras et al, 2018a).…”

Section: Discussionmentioning

confidence: 99%

High prevalence and intensity of fish nematodes with zoonotic potential in the Brazilian Amazon, including a brief reflection on the absence of human infections

et al. 2021

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This study aimed to characterize the prevalence, mean abundance, and mean intensity of potential fish-borne zoonotic nematode larvae infecting the predator fish Hoplias aff. malabaricus from the Tapajós River, in the municipality of Santarém, in the Brazilian Amazon. After capture, the specimens of H. aff. malabaricus were analyzed for infection by Contracaecum sp. and Eustrongylides sp. third-stage larvae, and the prevalence, mean abundance, and mean intensity were calculated. A literature search was carried out to clarify the relationship between these indicators and eventual human cases of infection in the Amazon region. Third-stage larvae of nematodes of the Contracaecum and Eustrongylides genera were found in the specimens of H. aff. malabaricus sampled from the Tapajós River. The prevalence of Contracaecum larvae was 100%, while its mean abundance and mean intensity were both 54.8 larvae/fish. The prevalence of Eustrongylides larvae was 62.9%, and its mean abundance and mean intensity were 1.8 and 2.8 larvae/fish, respectively. Despite the high prevalence and intensity values, there are no cases of human infection by these nematode larvae in the Brazilian Amazon reported. The absence of human infections by these nematode larvae in the Brazilian Amazon despite the high prevalence/intensity of Contracaecum and Eustrongylides larvae and the high consumption of fish in the region, is most probably due to the fact that the local populations do not eat raw or undercooked fish. However, it is noteworthy that the absence of zoonotic cases in the region is based only on the examination of the available published papers. A better knowledge of the situation would require surveying hospitals and clinics, and data from the region’s medical treatment facilities. However, the authors consider that cases of human infection, if any, are extremely rare, mainly due to the eating habits of the local population. KEY WORDS: Amazon basin; freshwater fish; public health; parasitic infection; zoonosis.

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Section: Discussionmentioning

confidence: 99%

High prevalence and intensity of fish nematodes with zoonotic potential in the Brazilian Amazon, including a brief reflection on the absence of human infections

et al. 2021

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“…Eustrongylides species have a heteroxenous life cycle. Among fish-eating birds, the great cormorant (Phalacrocorax carbo Linnaeus, 1758) has been frequently reported to be a definitive host [1,2]. Aquatic oligochaetes (i.e., Lumbriculus variegatus, Tubifex tubifex, and Limnodrilus spp.)…”

Section: Introductionmentioning

confidence: 99%

First Occurrence of Eustrongylides spp. (Nematoda: Dioctophymatidae) in a Subalpine Lake in Northwest Italy: New Data on Distribution and Host Range

Menconi

Riina

Pastorino

et al. 2020

IJERPH

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The genus Eustrongylides includes nematodes that infect fish species and fish-eating birds inhabiting freshwater ecosystems. Nematodes belonging to the genus Eustrongylides are potentially pathogenic for humans; infection occurs after the consumption of raw or undercooked fish. In the two-year period 2019–2020, a total of 292 fish belonging to eight species were examined for the occurrence of Eustrongylides spp. from Lake San Michele, a small subalpine lake in northwest Italy. The prevalence of infestation was 18.3% in Lepomis gibbosus, 16.7% in Micropterus salmoides, and 10% in Perca fluviatilis. The other five fish species (Ameiurus melas, Ictalurus punctatus, Squalius cephalus, Carassius carassius, and Scardinius erythrophthalmus) were all negative for parasite presence. There were no significant differences in prevalence between the three fish species (Fisher’s exact test; p = 0.744). The mean intensity of infestation ranged from 1 (M. salmoides and P. fluviatilis) to 1.15 (L. gibbosus), and the mean abundance ranged from 0.1 (P. fluviatilis) to 0.28 (L. gibbosus). There were significant differences in the infestation site between the four muscle quadrants (anterior ventral, anterior dorsal, posterior ventral, and posterior dorsal) and the visceral cavity (Kruskal–Wallis test; p = 0.0008). The study findings advance our knowledge about the distribution and host range of this parasite in Italy.

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Fish Invasion with Eustrongylides Excisus (Nematoda: Dioctophymatidae) in the Don River Delta

Kazarnikova,

Stepanova,

Gus’kov

et al. 2024

Lecture Notes in Networks and Systems

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First Record of Eustrongylides excisus (Dorylaimea: Dioctophymatidae) in Fish of the Rybinsk Reservoir

Cited by 4 publications

References 1 publication

High prevalence and intensity of fish nematodes with zoonotic potential in the Brazilian Amazon, including a brief reflection on the absence of human infections

High prevalence and intensity of fish nematodes with zoonotic potential in the Brazilian Amazon, including a brief reflection on the absence of human infections

First Occurrence of Eustrongylides spp. (Nematoda: Dioctophymatidae) in a Subalpine Lake in Northwest Italy: New Data on Distribution and Host Range

Fish Invasion with Eustrongylides Excisus (Nematoda: Dioctophymatidae) in the Don River Delta

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