Sometimes this test gives false negative results, though, because the virus «hides» in the cells and is not presents in the blood itself. (dog-health-guide.org)
However, the use of other cut - offs may be justified to reduce the rate of false negatives in routine care [41]. (journals.plos.org)
However, it is not a very sensitive means of heartworm detection in the cat (i.e., there is a high chance of false negative test results). (maddiesfund.org)