The Eiken Latex test for detection of a cryptococcal antigen in cryptococcosis. Comparison with a monoclonal antibody-based latex agglutination test, Pastorex Cryptococcus

Mycopathologia. 1994 Sep;127(3):131-4. doi: 10.1007/BF01102911.

Abstract

A latex agglutination test for cryptococcal antigen, the Eiken Latex test (Eiken, Tokyo, Japan), was compared with a monoclonal antibody-based agglutination assay, Pastorex Cryptococcus (Diagnostics Pasteur, Marneur-la-Coquette, France). In a murine model of disseminated cryptococcosis, the kinetics of the antigen titers by the Eiken Latex were similar to those by the Pastorex Cryptococcus, but sensitivity was much higher. In HIV-negative patients with pulmonary cryptococcosis, a cryptococcal antigen was detected in 6 of 10 patients by the Eiken Latex test and in only 3 of those patients by the Pastorex Cryptococcus. The results indicate that the Eiken Latex is more sensitive for the detection of the cryptococcal antigen, even in non-disseminated cryptococcosis. The sensitivity and specificity of the Eiken Latex were examined using 195 sera from 25 patients with pulmonary cryptococcosis and 170 patients with non-cryptococcosis. The cutoff value of > or = 1:8 showed a sensitivity of 76% (19/25) and a specificity of 98.9% (168/170).

Publication types

  • Comparative Study

MeSH terms

  • Agglutination Tests
  • Animals
  • Antibodies, Monoclonal
  • Antigens, Fungal / blood*
  • Cryptococcosis / diagnosis*
  • Cryptococcus neoformans / immunology*
  • Humans
  • Latex Fixation Tests*
  • Lung Diseases, Fungal / diagnosis*
  • Male
  • Mice
  • Polysaccharides / blood*
  • Sensitivity and Specificity

Substances

  • Antibodies, Monoclonal
  • Antigens, Fungal
  • Polysaccharides
  • cryptococcal polysaccharide