Wildlife veterinarian Mark Johnson, who says he oversaw the health of wolves during introduction into Yellowstone and Central Idaho, says the wolves were all healthy and the presence of hydatid disease found in over 60% of wild wolves tested this year didn’t come from his treated wolves. He also says reducing the number of wolves in this area will have no effect on the spread of disease.

“Reducing the number of wolves, or density of wolves, will not change the abundance of Echinococcus in any way, shape, or form, because the wolves are not getting it from each other.”

And this of course runs contrary to studies done in Russia where they have dealt with the presence of wolves for centuries. As related to us from Will Graves, author of “Wolves in Russia: Anxiety Through the Ages“:

When and where wolves were almost eliminated in a given research area, (where almost all wolves were killed by each spring and new wolves moved into the controlled area only in the fall) infections of taenia hydatiqena in moose and boar did not occur in more than 30 to 35% of the animals. The rate of infections were 3 to 5 examples in each animal. When and where wolves were not killed in the controlled areas in the spring, and where there were 1 or 2 litters of wolf cubs, the infections in moose and boar of taenia hydatiqena reached 100% and up to 30 to 40 examples of infection (infestation) were in each moose and boar.

To me this certainly sounds like the density of wolves played a very significant role in the spread of infectious diseases.

So now we must decide whether to believe an American wildlife veterinarian whose only experience in dealing with wolf related disease is a one-shot deal during introduction or Russian studies having dealt with wolves in their country for as long as history accounts for it.

Tom Remington

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