Sentences with phrase «antigens of microfilaria»

Immunodiagnosis involves looking for antigens of microfilaria or antibodies against the microfilaria using monoclonal antibody techniques.

Not exact matches

For example, an infected dog within the household may be the source of heartworm and therefore should be tested for heartworm antigen and microfilariae.

There is generally no need to test a dog for antigen or microfilariae prior to ~ 7 mo of age.

Performance of a microfilariae test is recommended at the time the antigen test is performed (6 mo after the adulticide treatment).

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).

Up to 1 % of infected dogs are microfilaria - positive and antigen - negative.

The preventative won't affect antigen test results and it can prevent the spread of heartworm in the shelter and prevent infection in an animal, even if microfilaria (heartworm larvae) are already present in the bloodstream.

One 13 - years - old mixed male, with high number of microfilariae and antigens - positive, died during the therapy.

As a matter of fact, none of seven dogs from a non-endemic area in Central Italy (Fermo, Marche), with D. immitis microfilariae (fig. 1,2,4) in the blood and patent disease, proved seropositive with two antigen tests (PetChek and Wittness).

Diagnosis of canine dirofilariosis in animals which originate from a low - endemic region is difficult for 3 main reasons: 1) possible absence of circulating microfilariae (occult disease), 2) high frequency of a low number of adults, which in turn produces false negative results, using either ELISA or latex agglutination test, 3) possible false sero - positive results, due to cross-reaction with adult antigens of Dirofilaria (Nochtiella) repens (Schrey, 1996), the agent of subcutaneous dirofilariasis causing chronic pruritic dermatitis in dogs (Tarello, 1999).

The reliability of heartworm testing, which depends on the presence of heartworm antigen or microfilariae, is affected by the relative lack of both in cats.

However, in stage one the disease has not yet progressed to the point where the heartworms will have produced a new generation of microfilariae and dog's body will not yet have produced antigens in an amount sufficient for detection.

If the antigen screening test is positive, another blood test is available to identify the concentration of microfilariae in circulation.