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Journal of Clinical Microbiology, April 2000, p. 1382-1384, Vol. 38, No. 4
First Department of Internal Medicine, Kurume
University School of Medicine, Asahi-machi 67, Kurume, Fukuoka
830-0011,1 and National Kyushu Medical
Center, Jigyouhama Chuouku, Fukoka
810-00652, Japan
Received 8 October 1999/Returned for modification 7 December
1999/Accepted 10 January 2000
In the present study, serologic data were compared with data
obtained by capillary PCR to establish the efficacy of capillary PCR
for the determination of Mycoplasma infection in samples
obtained from throat swabs, bronchoalveolar lavage fluids (BALF), and
sputum of patients with Mycoplasma pneumonia. We performed
PCR analysis for Mycoplasma DNA on a total of 325 samples
from 197 patients with community-acquired pneumonia and in
whom Mycoplasma pneumonia was suspected. There were 68 PCR-positive specimens. Review of the differences in PCR positivity
rates based on the site of specimen collection showed the highest rate
of detection (28.6%) from throat swabs. From among the 31 patients
with significantly elevated titers of serum Mycoplasma
antibodies, the PCR results were positive for 25 patients. Thus,
capillary PCR had a sensitivity of 80.6% (25 of 31). Five of the six
false-negative results were from throat swab specimens. Moreover,
testing (PCR) had been performed only once for these five patients with
false-negative results. From among the PCR-positive findings
from BALF specimens, there were no false-positive results. BALF
specimens were very useful, except for the technical procedures and
increased patient burden required to obtain these specimens. We suggest
that the use of throat swab specimens in capillary PCR is much more
suitable for diagnosing Mycoplasma pneumonia in
routine clinical practice; however, careful throat swab specimen
collection and an increase in the number of times that the PCR is
performed are necessary to reduce the rate of false-negative results.
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Clinical Use of Capillary PCR To Diagnose
Mycoplasma Pneumonia
*
Corresponding author. Mailing address: First Department
of Internal Medicine, Kurume University School of Medicine, Asahi-machi 67, Kurume, Fukuoka 830-0011, Japan. Phone: 81-942-31-7560. Fax: 81-942-31-7703. E-mail: junbm1c{at}med.kurume-u.ac.jp.
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