TL;DR: Salmon Poisoning Disease is a life-threatening parasitic infection caused by eating raw fish; immediate veterinary care is required as it is fatal in up to 90% of untreated cases.
What is Salmon Poisoning Disease and how do dogs catch it?
- Salmon Poisoning Disease (SPD) is not caused by fish toxicity, but by an infection from the parasite Neorickettsia helminthoeca.
- The parasite is carried by flukes (small flatworms) that live in the flesh of raw salmonid fish, including trout and steelhead.
- These infected fish are primarily found in the Pacific Northwest region.
Is it a medical emergency if my dog eats raw salmon?
- Yes, this is a high-urgency situation as the disease is fatal in up to 90% of dogs if left untreated.
- The incubation period ranges from 5 to 7 days, so your dog may not show symptoms immediately.
- It is critical to contact a veterinarian immediately after ingestion rather than waiting for your dog to show signs of illness.
How does taking a photo help the veterinary team triage my dog?
- A photo of the fish or its packaging helps the team determine the type of fish and its origin.
- If your dog vomits, a photo can reveal if bones were ingested or show evidence of fluke-carrying tissue.
- These images allow for a more accurate risk assessment and faster triage for your pet.
Clinical Context (Merck Veterinary Manual)
Dogs can become infected by eating raw or improperly prepared salmonid fish containing metacercariae. These flukes can cause enteritis, but most infections result in salmon poisoning, a complex caused by rickettsial organisms transmitted by the fluke. Prevention involves restricting the ingestion of uncooked salmon, trout, steelhead, and similar freshwater fish. Treatment includes parenteral oxytetracycline (7 mg/kg IV, three times daily for 5 days) or doxycycline (10 mg/kg twice daily for 7 days). Oral tetracycline or doxycycline is contraindicated due to existing gastrointestinal signs. Supportive therapy to maintain hydration, electrolyte and acid-base balance, meet nutritional requirements, and control diarrhea is essential. Whole blood transfusions may be helpful.
Chapter: Nutrition, Infectious Disease
Source: The Merck Veterinary Manual, 11th Edition (Page 2376)