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Journal of Clinical Microbiology, December 1998, p. 3619-3623, Vol. 36, No. 12
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Evaluation of PCR for Detection of DNA Specific for Aspergillus Species in Sera of Patients with Various Forms of Pulmonary Aspergillosis

Yuriko Yamakami,* Atsuro Hashimoto, Eiji Yamagata, Perparim Kamberi, Reiko Karashima, Hiroyuki Nagai, and Masaru Nasu

Second Department of Internal Medicine, Oita Medical University, Oita, Japan

Received 2 March 1998/Returned for modification 24 June 1998/Accepted 5 September 1998

Pulmonary aspergillosis is classified into invasive, saprophytic, and allergic forms. In this study, we evaluated the usefulness of PCR for differentiating between different forms of aspergillosis or in monitoring disease activity during treatment by detecting DNA specific for Aspergillus species in the serum. Nested PCR was used to detect Aspergillus DNA in the sera of 30 patients with various forms of pulmonary aspergillosis. The results were compared with those of latex agglutination tests for detecting galactomannan antigen. We also examined the serial changes in the results of nested PCR during and after treatment of a subgroup of patients with invasive pulmonary aspergillosis with amphotericin B. The highest proportion of positive nested PCR results were in patients with invasive aspergillosis (10 of 12; 83%), while patients with pulmonary aspergilloma had the lowest frequency of positive tests (1 of 9; 11%). These results suggested that the sensitivity of the nested PCR depends on the extent of invasion by Aspergillus species. Serial assays showed that the results of nested PCR became negative shortly after commencement of antifungal treatment and that such changes did not correlate with clinical responsiveness to treatment. Our results indicate the potential usefulness of nested PCR with serum samples for the diagnosis of invasive aspergillosis and the detection of a shift in the status of infection from a noninvasive type to invasive aspergillosis. However, the results of the nested PCR did not correlate with the response to antifungal treatment.

* Corresponding author. Mailing address: The Second Department of Internal Medicine, Oita Medical University, Hasama-machi, Oita, 879-5593, Japan. Phone: 81 (97) 586-5804. Fax: 81 (97) 549-4245. E-mail: yamakami{at}oita-med.ac.jp.

Journal of Clinical Microbiology, December 1998, p. 3619-3623, Vol. 36, No. 12
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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