alexa Immunodiagnosis of histoplasmosis in a compromised host.
Toxicology

Toxicology

Journal of Clinical Toxicology

Author(s): Land GA, Foxworth JH, Smith KE

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Abstract Three serological tests for the diagnosis of histoplasmosis were compared for sensitivity and specificity in serum from blood bank donors, patients with histoplasmosis, and infected or noninfected immunosuppressed patients. The histoplasmin latex agglutination test was positive in 9\% of the normal patients, 33\% of the histoplasmosis patients, and 61\% of the noninfected immunosuppressed patients. Since the test is prone to many false-positive results in patients with inflammatory diseases or non-Histoplasma infections, it has limited potential as a screening test among compromised patients. Immunodiffusion and counterimmunoelectrophoresis using a mycelial antigen were found to be more sensitive than either test using a combined yeast and mycelial antigen or a pure yeast phase antigen. Counterimmunoelectrophoresis at pH 7.2 proved to be the test of choice for serodiagnosis of histoplasmosis, resolving 85\% of the immunocompetent infected patients and 100\% of the infected immunosuppressed patients. Results indicated that counterimmunoelectrophoresis in conjunction with immunodiffusion could be used as a screening protocol to determine infection in incoming patients in a cancer hospital.
This article was published in J Clin Microbiol and referenced in Journal of Clinical Toxicology

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