Acanthocephalans are “thorny- or spiny-headed” elongated (10 mm long) cylindrical worms, having an anterior refractile proboscis with hooks (Fig. 5-10).
Snakehead, catfish, eel, tilapia, milkfish
The parasite is attached to intestinal mucosa of the host. Affected fish have darkened, emaciated body.
EFFECTS ON HOST:
The parasite causes necrotic hemorrhagic ulcers in the intestine of the host. Growth retardation and mortality have been reported.
Gross examination of intestine reveals elongated and sac-like worms with retractile proboscis armed with spines.
PREVENTION AND CONTROL:
• Disinfect pond with quicklime
• Control of water supply and potential intermediate hosts
• Quarantine new and suspected stocks
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