Sentences with phrase «resistance against heartworms»
Cats seem to have a greater natural resistance against heartworms as compared to dogs.
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Depending on the number of heartworms present, they can obstruct the vessels, causing the heart to pump harder against the increased resistance of blood flow.
But there is another important factor at work here against the spread of heartworm resistance.
As of August 2013, the experts recommend against using heartworm preventative medications like Ivermectin in a «slow - kill» method because it may encourage drug - resistance in the heartworm, and so make it more difficult to successfully treat or protect dogs.
The physical presence of the heartworms irritates the vessel and heart walls, and, depending on the number present, occlude vessels, causing the heart to pump harder against increased resistance to blood flow.