Leish-KIT, a stable direct agglutination test based on freeze-dried antigen for serodiagnosis of visceral leishmaniasis.
AUTOR(ES)
Meredith, S E
RESUMO
In order to increase the application potential of the direct agglutination test (DAT) for the detection of anti-Leishmania antibodies in human serum samples, we developed an antigen based on stained and freeze-dried Leishmania donovani promastigotes. We describe here the evaluation of the performance of the DAT based on this freeze-dried antigen. It was shown that the freeze-dried antigen remains fully active, even after storage at 56 degrees C for 18 months. With a cutoff value of 1:1,600, the sensitivity of the DAT was shown to be 92% and the specificity of the test was 99.7%, which were comparable with the results found for the DAT based on liquid antigen. The major advantages of the freeze-dried antigen are that the production of a large batch of this antigen allows reproducible results in the DAT over a long period of time and that the freeze-dried antigen can be stored at ambient temperature, which, as was shown, makes the test a valuable diagnostic tool for use in the field.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=228261Documentos Relacionados
- Freeze-dried rubella virus hemagglutinating antigen.
- Improvement of a direct agglutination test for field studies of visceral leishmaniasis.
- Freeze-dried erythrocytes for an indirect hemagglutination test for detection of cytomegalovirus antibodies.
- Stabilized, Freeze-Dried PCR Mix for Detection of Mycobacteria
- Production of freeze-dried human antihaemophilic cryoprecipitate.
