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Original ArticleOpen Access
Mycoplasma pneumoniae Community-Acquired Pneumonia at Three Hospitals in Bangkok
Chaoprasong C 
,
Chanthadisai N ,
Buasap U ,
Tirawatnapong S ,
Wattanathum A
,
Chanthadisai N ,
Buasap U ,
Tirawatnapong S ,
Wattanathum A NONGLAK CHANTHADISAI, M.D.*,
SURANAN TIRA W A TNAPONG, M.Sc.***,
Background :
Mycoplasma pneumoniae
is one of the common causes of community-
acquired pneumonia (CAP) in children and young adults. In Thailand, there has been no prospective
study to evaluate the prevalence, clinical features and laboratory findings of
M. pneumoniae
in adult
patients with CAP.
Method : The authors prospectively investigated the cause of CAP in adult patients at three
general hospitals from September 1998 to August 1999. Paired sera were tested forM.
pneumoniae
infeCtion by using particle agglutination and definite diagnosis was based on a fourfold increase in
antibody titer.
Results : Seventeen (21.3%) of 80 patients had pneumonia due toM.
pneumoniae.
Mean
age was 28.3 years old (range 18-40). The most common clinical manifestations were cough (100%
of cases), fever (82.4% of cases), and headache (47% of cases). Eighty-eight per cerit of these patients
were classified as class I category, according to the A TS guideline. All patients had a white blood
cell count between 4,000-12,000 cells/mm3
*
In addition, the common radiographic manifestations
were alveolar shadowing (53%), and mixed alveolar and interstitial shadowing (29.4%). Sixteen
cases (94%) were treated with the appropriate antibiotic and all patients survived without complica-
tion.
Conclusion : These findings suggest that
M. pneumoniae
is a common cause of CAP in
Bangkok, Thailand. This type of pneumonia usually occurs in young adults and can usually be treated
as ambulatory patients.
Key word :
Mycoplasma pneumoniae,
Community-Acquired Pneumonia
SURANAN TIRA W A TNAPONG, M.Sc.***,
Background :
Mycoplasma pneumoniae
is one of the common causes of community-
acquired pneumonia (CAP) in children and young adults. In Thailand, there has been no prospective
study to evaluate the prevalence, clinical features and laboratory findings of
M. pneumoniae
in adult
patients with CAP.
Method : The authors prospectively investigated the cause of CAP in adult patients at three
general hospitals from September 1998 to August 1999. Paired sera were tested forM.
pneumoniae
infeCtion by using particle agglutination and definite diagnosis was based on a fourfold increase in
antibody titer.
Results : Seventeen (21.3%) of 80 patients had pneumonia due toM.
pneumoniae.
Mean
age was 28.3 years old (range 18-40). The most common clinical manifestations were cough (100%
of cases), fever (82.4% of cases), and headache (47% of cases). Eighty-eight per cerit of these patients
were classified as class I category, according to the A TS guideline. All patients had a white blood
cell count between 4,000-12,000 cells/mm3
*
In addition, the common radiographic manifestations
were alveolar shadowing (53%), and mixed alveolar and interstitial shadowing (29.4%). Sixteen
cases (94%) were treated with the appropriate antibiotic and all patients survived without complica-
tion.
Conclusion : These findings suggest that
M. pneumoniae
is a common cause of CAP in
Bangkok, Thailand. This type of pneumonia usually occurs in young adults and can usually be treated
as ambulatory patients.
Key word :
Mycoplasma pneumoniae,
Community-Acquired Pneumonia
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