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Updated: Jul 19, 2026

Antigen-Capture Enzyme-Linked Immunosorbent Assay for Specific Detection of Mycoplasma pneumoniae
Published on: February 24, 2023
[Clinical study of 90 cases of Mycoplasma pneumoniae pneumonia]
Yousuke Miyahar1, Noboru Takayanagi, Motoko Kubota
1Department of Respiratory Medicine, Saitama Cardiovascular and Respiratory Center.
Abstract:
We investigated 90 patients with Mycoplasma pneumoniae (M. pneumoniae) pneumonia. Forty-four patients were men, 46 were women and the mean age was 43.1 years old. Twenty-nine patients were smokers and 28 had underlying diseases. As for diagnostic method, 16 were culture positive, 71 had a fourfold increase in antibody titer to M. pneumoniae, and 3 were both culture positive and had a fourfold increase in antibody titer. Regarding the degree of severity, 21 patients were classified as severe according to Japanese Respiratory Society diagnostic criteria, 11 patients were diagnosed as severe according to American Thoracic Society diagnostic criteria. Partial pressure of arterial oxygen (PaO2) of 18 patients were <60mmHg, 5 patients were under mechanical ventilation, and 3 patients died. Three of 16 patients treated with only beta-lactum antibiotics recovered. The 3 patients who died were M. pneumoniae culture-positive and two patients had polymicrobial infections. Severe pneumonia associated with Mycoplasma pneumoniae infection is not unusual. If a rapid diagnosis kit or culture method of M. pneumoniae pneumonia is not introduced, the pathogen might be unknown in cases of rapid death due to M. pneumoniae pneumonia. These data suggest that the mortality rate of M. pneumoniae pneumonia might be underestimated without these detection tests.
Insights
Severe Mycoplasma pneumoniae pneumonia is common. Without rapid diagnostic tests, Mycoplasma pneumoniae (M. pneumoniae) pneumonia deaths may be underestimated, impacting accurate mortality rates.
Area of Science:
- Infectious Diseases
- Pulmonology
- Microbiology
Context:
- Mycoplasma pneumoniae (M. pneumoniae) is a common cause of community-acquired pneumonia.
- Accurate diagnosis of M. pneumoniae pneumonia can be challenging, especially in severe cases.
- Current diagnostic methods may not always identify the pathogen promptly.
Purpose:
- To investigate the clinical characteristics and outcomes of patients with Mycoplasma pneumoniae pneumonia.
- To assess the severity and mortality associated with M. pneumoniae pneumonia.
- To highlight the importance of diagnostic methods for M. pneumoniae detection.
Summary:
- This study analyzed 90 patients with M. pneumoniae pneumonia, noting demographic data, comorbidities, and diagnostic methods (culture, antibody titers).
- Severity was assessed using Japanese and American Thoracic Society criteria, with some patients requiring mechanical ventilation or experiencing fatal outcomes.
- M. pneumoniae was identified as the causative agent in fatal cases, sometimes alongside polymicrobial infections, underscoring the need for effective detection.
Impact:
- Severe M. pneumoniae pneumonia is not rare and can lead to significant morbidity and mortality.
- The study suggests that current mortality rates for M. pneumoniae pneumonia may be underestimated due to diagnostic limitations.
- Implementing rapid diagnostic kits or improved culture methods is crucial for timely pathogen identification and management.
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