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. 1994 Oct;32(10):2417–2421. doi: 10.1128/jcm.32.10.2417-2421.1994

Utility of complement fixation and microimmunofluorescence assays for detecting serologic responses in patients with clinically diagnosed psittacosis.

K H Wong 1, S K Skelton 1, H Daugharty 1
PMCID: PMC264077  PMID: 7814477

Abstract

The serodiagnosis of human psittacosis was considerably improved by a microimmunofluorescence (MIF) assay that uses selected strains of Chlamydia psittaci, C. pneumoniae, and C. trachomatis as antigens. The 78 patients examined in the study were clinically diagnosed as having psittacosis on the basis of compatible clinical symptoms following exposure to sick birds. The conventional complement fixation (CF) test identified 36 patients, or 46% (36 of 78) of the total, as positive. Antibody responses to C. psittaci were demonstrated by the MIF test in all 36 CF-positive patients. The MIF test also detected antibody responses to C. psittaci in 12 patients (15% of the total) whose sera were negative or anticomplementary in the CF test. Seven patients, or 9% (7 of 78) of the total, were identified by the MIF test as having C. pneumoniae infections. About 30% of the study patients (23 of 78) showed no serologic evidence of either C. psittaci or C. pneumoniae infection by both the CF and the MIF tests. Four distinctive serologic reaction patterns were observed in the study patients. Recognition of these reaction patterns and judicious corroboration of serologic responses to the chlamydial species by the MIF test with epidemiologic and clinical information will increase the efficiency and accuracy of serodiagnosis for human psittacosis.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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