Morphological and Molecular Identification of Dactylogyrus gobiocypris (Monogenea: Dactylogyridae) on Gills of a Model Fish, Gobiocypris rarus (Cypriniformes: Gobionidae)

The rare minnow is an ideal model organism for toxicological research. species are usually found on the gills of this rare minnow in laboratory farming systems. Dactylogyrid infection may change the sensibility of fish to toxicants and affect toxicological evaluations. In the present study, dactylog...

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Bibliographic Details
Published in:Pathogens (Basel) 2023-01, Vol.12 (2), p.206
Main Authors: Cheng, Jiangwen, Zou, Hong, Li, Ming, Wang, Jianwei, Wang, Guitang, Li, Wenxiang
Format: Article
Language:English
Subjects:
dactylogyrid infection
Dactylogyrus
Dactylogyrus gobiocypris
Farming systems
Filaments
Fish
Gills
Gobiocypris rarus
Histopathology
Hyperemia
Inflammation
Laboratories
minnows
Morphology
Museums
Necrosis
nucleotide sequences
Parasites
Penis
Phylogenetics
Phylogeny
Physical characteristics
rare minnow
Rare species
sequence analysis
toxic substances
Toxicants
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Summary:The rare minnow is an ideal model organism for toxicological research. species are usually found on the gills of this rare minnow in laboratory farming systems. Dactylogyrid infection may change the sensibility of fish to toxicants and affect toxicological evaluations. In the present study, dactylogyrid infection was investigated, and species of collected from rare minnows were determined. Based on the observed ' ' type anchors, with a shorter outer root and elongated inner root, and accessory piece consisting of two parts, the dactylogyrids were identified as . A partial 18S-ITS1 rDNA sequence was firstly sequenced, and the highest sequence identity (86.7%) was to . Phylogenetic analysis revealed that formed a clade with , , and , all of which have been recorded in the family Gobionidae. Histopathology analysis indicated that a heavy burden of caused necrosis of gill filaments. Inflammatory responses, such as tumefaction and hyperaemia, were also observed on gills with severe dactylogyrid infection. Supplementary morphological characteristics and 18S-ITS1 rDNA sequence provided basic data for identification of this parasite species.
ISSN:2076-0817
2076-0817
DOI:10.3390/pathogens12020206