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Serological Study of Mycoplasma pneumoniae Infections

935

Somporn Srifuengfung PhD*,
Wanida Techachaiwiwat MSc*, Chertsak Dhiraputra MD,MSc*

* Department of Microbiology, Faculty of Medicine Siriraj Hospital, Mahidol University

Abstract


Mycoplasma pneumoniae antibody was determined in 811 sera of different patients admitted to Siriraj Hospital with respiratory tract infection from July 1, 2000 to August 31, 2003 by agglutination with gelatin particle agglutination test kit (SERODIA-MYCO II, Fujirebio Inc. Japan) in microtiter plates. Three hundred and three sera were positive (37.36%). The five most positive titer were found in patients 5-9 yr (40.26%), followed by patients 1-4 yr (24.75%), 10-14 yr (19.80%), 30-39 yr (5.28%) and 20-29 yr (3.96%). The positive titers ranged from 40 to > 20480. Female: male ratio in positive patients was approximately the same (1.19:1). High titers (> 320) were found in 146 out of 303 patients (48.18%). The infection was mostly found in children aged 5-9 yr. Detection of antibody to M. pneumoniae infection showed that 37.36 % of patients who were suspected of having atypical bacterial pneumonia were positive.

Keyword : Serological study, Mycoplasma pneumoniae, Atypical bacterial pneumonia



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