Occurrence and host associations of Dollfustrema bagarii (Digenea: Bucephalidae) in channel catfish cage culture in Northern Vietnam

Hung Anh Le, Manh Duc Vu, Truong Dinh Hoai, Van Kim Van, Minh Anh Kim, Ha Nguyen Van, Hoang Van Hien, Nguyen Ngoc Chinh, Anh Tuan Tran, Nadezhda Simonova, Dmitry Atopkin, Stephen E. Greiman, Henry Madsen, Hung Manh Nguyen

Research output: Contribution to journalArticlepeer-review

Abstract

A survey was conducted across 11 provinces in Northern Vietnam to investigate the distribution of Dollfustrema bagarii metacercariae – a causative agent of significant losses in cultured channel catfish (Ictalurus punctatus) – and to identify its first intermediate host. A total of 337 fish specimens were collected from 103 farms. Metacercariae of D. bagarii were detected in 72 farms (69.9% of farms), and 44.51% of the sampled fish were positive. The prevalence in lowland provinces was 3.14 times higher than that in mountainous regions (p < 0.001), while no significant difference was observed between fish cultured in reservoir/lake and those in river (p = 0.634). We identified the golden mussel Limnoperna fortunei (Bivalvia: Mytilidae) as the first intermediate host of D. bagarii. The morphological characteristics of its daughter sporocyst and cercariae were described, and the identification was confirmed through comparison of 28 S rDNA sequences with those of D. bagarii.

Original languageEnglish
Article number133
JournalParasitology Research
Volume124
Issue number11
DOIs
StatePublished - Nov 2025

Scopus Subject Areas

  • Parasitology
  • General Veterinary
  • Insect Science
  • Infectious Diseases

Keywords

  • Intermediate host mussel
  • Introduced fish
  • Limnoperna fortunei
  • “Off-white grub” disease

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