What is being recommended is that veterinarians learn to appreciate the limitations of the tests and augment their diagnostic procedures.įor routine annual screening we need to be conducting an antigen test and also go “old school” and look for circulating microfilariae (Knott’s test, filter test, or even a direct smear) in the blood.įor dogs with clinical signs indicative of CHD, conduct not only an antigen test, but also a test to recover microfilariae, chest radiographs and a CBC. They are the best diagnostic tests available. Now even with the abovementioned limitations, parasitologists are not recommending that practices stop using these tests for clinical diagnosis or routine screening. lupi is most commonly encountered in the Southern states, such as Louisiana, this author has recently consulted on cases in Kansas, Nebraska and Missouri, one of which was positive on an antigen test.
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