Gastrointestinal parasitism in cockles (roundworms)
The cockle (Cerastoderma edule) is a marine bivalve mollusc with no digestive system comparable to that of vertebrates, and no anatomical structure capable of harbouring intestinal 'roundworms' in the sense understood in mammals, birds, or...
What is it?
The cockle (Cerastoderma edule) is a marine bivalve mollusc with no digestive system comparable to that of vertebrates, and no anatomical structure capable of harbouring intestinal 'roundworms' in the sense understood in mammals, birds, or reptiles.
This information sheet was requested for an association of 'gastrointestinal parasitism by roundworms' that does not correspond to any recognised or documented disease in this mollusc. Bivalves can harbour other types of parasites (trematodes, copepods, protozoans such as certain Marteilia or Bonamia organisms affecting other species), but not 'roundworms' (nematodes) in the classical veterinary sense.
We prefer not to create medical content to avoid spreading incorrect information to our readers.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Related signs — each one links to its page:
Not applicable: this disease as named is not documented in cockles.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
Not applicable.
Not applicable.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
Not applicable.
Prevention
Not applicable.
Possible complications
Not applicable.
When to see a veterinarian
Contact a specialist in mollusk pathology or the relevant animal health authorities (WOAH/OIE reference for mollusk diseases) if you observe unusual mortality or abnormal behavior in a cockle farm or bed.
Prognosis
Not applicable, as no such disease is recognized in this species.
Frequently asked questions
Can shells get roundworms like dogs or cats do?
No. Nematodes (roundworms) that parasitize mammals or birds have no documented equivalent in bivalves such as cockles. Their anatomy and physiology are too different.
Which parasites actually affect cockroaches?
Marine bivalves can be affected by trematodes, certain protozoans or parasitic copepods, which are very different from the roundworms of terrestrial animals. These diseases are monitored by organizations such as WOAH (World Organisation for Animal Health) as part of farmed mollusc health.
What should I do if I notice shells becoming sick or dying in large numbers?
The incident must be reported to health authorities or to a specialized laboratory in shellfish pathology, which will be able to identify the real cause (bacterial, parasitic, or environmental).
References
WOAH — Organisation mondiale de la santé animale (ex-OIE)
Content reviewed by the TunisieVet editorial team · Updated 30 August 2026
Comments (0)
No comments yet.
AT A GLANCE
Need a veterinarian?
Find a practitioner near you on TunisieVet, with their specialities, hours and contact details.
Find a veterinarianCategories
Affected species
This information is provided for educational purposes only and is not a substitute for a veterinary consultation. If you have any concerns about your animal's health, consult a veterinarian.
Thinking of welcoming a pet? Dogs and cats are waiting for a family in Tunisia, and adoption is completely free.
Adoption listingsTo discover
Related diseases and linked Animalia content.
TunisieVet in your pocket 📱🐾 Access your veterinary services wherever you are. [ Download the app ]
Learn more