Most veterinary clinics can run an Antigen test in the hospital to
detect microfilaria in dogs; however, detection of heartworm is more difficult in cats and requires an Antibody test that is usually sent to an outside laboratory.
A blood test that
detects microfilaria is also used.
For this reason, it is virtually impossible to
detect microfilariae in an infected cat.
Not exact matches
Heartworm infection in apparently healthy animals is usually
detected with blood tests that either test for a heartworm substance called an «antigen» or for the
microfilaria themselves.
A cat's immune system removes the
microfilariae very quickly and makes it hard for a test to
detect.
Microfilariae are rarely
detected by Knott's or filter tests (< 10 %).
This represents the time period from when the larvae has entered the animal's body until the
microfilaria can be
detected in the blood.
A simple blood test can be performed by your veterinarian to
detect the presence of immature heartworms (
microfilaria) in your pet.
Rather than visually searching for the
microfilaria, blood screening antigen tests can
detect the presence of adult female worms even before they've had babies.
And, finally, in any dog with a very low heartworm burden — say, just a couple of worms — the
microfilariae may not be
detected (this can also cause a false negative on the antigen test).
Testing for the presence of
microfilariae by reviewing blood smears is also used to
detect early infection, the period before the adult heartworms has established residence in the arteries or heart and begun reproducing.
The only way to
detect the disease in its early stages is through a vet - administered blood test that identifies the
microfilariae.
Your veterinarian can
detect heartworm disease with blood tests for the heartworm
microfilariae or antigen.
Some dogs that test negative for
microfilaria may have adult heartworms
detected on the heartworm serology test (as is the case with Max).
Dogs Although funds may not be available for HWD diagnostics in all shelters, an ideal goal is to perform a heartworm antigen and
microfilaria test in all dogs at intake, as recommended by the American Heartworm Society (AHS) in their current guidelines.4 dogs for heartworms should communicate to adopters that immediate, and annual, testing is critical in order to
detect infection and initiate Shelters that do not test their treatment, if needed.
If they test positive for the heartworm antigen, a more sensitive test can be performed to
detect whether
microfilaria are in circulation.