Sentences with phrase «however false negative results»

However false negative results have been documented, and PCR testing is not recommended if a patient has been sick for more than four days.

Not exact matches

However, little kittens may give a false negative test result for many months - even when they are infected.

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).

However, it usually takes eight to 12 weeks after infection for detectable levels of antibody to appear in the bloodstream, so testing performed during this interval may result in false negative results.

However, dogs with less than 5 adult worms may not have enough antigen to produce a positive test result, giving a false negative result.