Connie Sutherland Moderator Reg: 07-13-2005
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Quote: shannon reed
Here is an article I have on file.
Shannon
"Salmon Poisoning Disease is a potentially fatal condition seen in dogs that eat certain types of raw fish. Salmon (salmonid fish) and other anadromous fish (fish that swim upstream to breed) can be infected with a parasite called Nanophyetus salmincola. Overall, the parasite is relatively harmless. The danger occurs when the parasite itself is infected with a rickettsial organism called Neorickettsia helminthoeca. It’s this microorganism that causes salmon poisoning." http://www.vetmed.wsu.edu/clientED/salmon.aspx
Right; that's the one we have linked here several times. This refers to those West-of-the-Cascades salmonids.
This is maybe not quite on topic because of the danger coming from the microorganism within the parasite rather than from the parasite. Neorickettsia helminthoeca are intracellular bacteria transmitted by the heterophyid fluke.
Ok, I completed my homework assignment. It turns out that the specific worms I had in mind are commonly known as cod worms. Who would have guessed? They are parasitic nematodes that the codfish often catch from eating the feces of infected seals. These parasites breed in the intestines of seals and other marine mammals. Humans are rarely infected by eating raw fish but when they are, it can require surgury! Yikes! This site gives the most nut-shell info on the cod worm that I came across- http://www.thecookinginn.com/seasafej.html
I'm never going to give my dog (previously unfrozen) raw fish ever! Never have, and now never will! Not even from the supermarket... I really appreciate Carol's policy of 10 days in the freezer for game and fish now!
Connie Sutherland Moderator Reg: 07-13-2005
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Loc: North-Central coast of California
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Quote: ingrid halonen
... I'm never going to give my dog (previously unfrozen) raw fish ever! Never have, and now never will! Not even from the supermarket... I really appreciate Carol's policy of 10 days in the freezer for game and fish now!
AND if you are using a home freezer, check the temp!
Many are too high. They are "frozen food storage" more than "freezer." You need commercially frozen or frozen at home at zero or below.
Here are the FDA guidelines for freezing to kill parasites. Nematodes are specifically listed as being controlled by these temperatures. I am still interested in looking for information that the pacific salmon is okay to feed after freezing, but that information is eluding me right now.
Quote:
FDA guidelines for freezing fish to kill parasites.
Freeze and store at -4°F (-20°C) or below for 7 days (total time); or
Freeze at -31°F (-35°C) or below until solid and store at -31°F (-35°C) or below for 15 hours; or
Freeze at -31°F (-35°C) or below until solid and store at -4°F (-20°C) or below for 24 hours. http://seafood.ucdavis.edu/haccp/compendium/chapt16.htm#Nematodes
I fear that pretty soon this is all going to affect my love of sushi
Shannon
Connie Sutherland Moderator Reg: 07-13-2005
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Loc: North-Central coast of California
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Quote: Shannon Reed
... I am still interested in looking for information that the pacific salmon is okay to feed after freezing ...
Do you mean specifically west-of-the-Cascades salmonids (the salmon-poisoning fish)? (It's not *all* Pacific salmon.)
If so, then I have indeed read that. But I have read other opinions that aren't so sure --- that while the fluke may die, the Neorickettsia helminthoeca (the intracellular bacteria that causes the illness) may not die under the worm freezing-guidelines.
Darn. I do not remember where I read either opinion. It left me with uncertainty and with NO intention to give the raw west-of-Cascade-area salmonids.
Connie Sutherland Moderator Reg: 07-13-2005
Posts: 31571
Loc: North-Central coast of California
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Example:
QUOTE: N.salmincola is a host for Neorickettsia helminthoeca which is the causative organism for "salmon poisoning" in canines. Salmon poisoning is characterized by appetite loss, depression, fever, lymph node enlargement and severe hemorrhagic gastro-enteritis and can be fatal to 80% of untreated dogs. ... currently the only means of prevention is to avoid ingestion of uncooked salmon, trout, steelhead, and similar Pacific Ocean freshwater fish.
END from http://www.urbancarnivore.com/uc_online/pages.cfm?ID=37
And that IS from an article about how long to freeze to kill parasites.
But I have read other opinions that aren't so sure --- that while the fluke may die, the Neorickettsia helminthoeca (the intracellular bacteria that causes the illness) may not die under the worm freezing-guidelines.
Quote:
It left me with uncertainty and with NO intention to give the raw west-of-Cascade-area salmonids.
Connie-
That is exactly where I am at with feeding raw salmon. I can't find conclusive evidence that the bacteria is actually killed by freezing only that its "host" is. I have heard a lot of hearsay, but the risk is to great for me to rely on that.
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