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Pneumocystis carinii antibody testing.

J M Chatterton1, A W Joss, H Williams

  • 1Microbiology Department, Raigmore Hospital, Inverness, Scotland.

Journal of Clinical Pathology
|August 1, 1989
PubMed
Summary

Antibody detection for Pneumocystis carinii pneumonia (PCP) using indirect immunofluorescence showed higher rates in patients with specific conditions. Positive results can aid diagnosis, but negative serology does not rule out PCP infection.

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Area of Science:

  • Medical Microbiology
  • Immunology
  • Infectious Diseases

Background:

  • Pneumocystis carinii pneumonia (PCP) is a significant opportunistic infection.
  • Accurate serological markers for PCP diagnosis are crucial, especially in immunocompromised individuals.

Purpose of the Study:

  • To evaluate the utility of indirect immunofluorescence (IIF) for detecting antibodies against Pneumocystis carinii in Scottish blood donors and patients.
  • To correlate antibody detection rates with various clinical conditions and assess its diagnostic value for PCP.

Main Methods:

  • Indirect immunofluorescence assay (IIF) was employed to detect antibodies against Pneumocystis carinii antigen in sera.
  • Sera were collected from blood donors and patients across Scotland, including those with specific clinical diagnoses.
  • Antibody titers were analyzed in relation to clinical outcomes and patient groups.

Main Results:

  • An overall antibody prevalence of 15.6% was observed in patients, compared to 8.8% in blood donors.
  • Higher antibody rates were found in patients with confirmed or suspected PCP (58.3%), transplant recipients (33.3%), and HIV-positive individuals (25.6%).
  • Seroconversion or rising titers were more frequent in confirmed PCP cases (53.8%) than in other patients (10.7%).

Conclusions:

  • Indirect immunofluorescence serology can assist in the diagnosis of Pneumocystis carinii infection.
  • A negative serological result does not exclude the possibility of Pneumocystis carinii pneumonia.
  • Further investigation is warranted to refine serological diagnostic criteria for PCP.

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