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Anaerobic bacterial infections of the lung and pleural space
1Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland.
Abstract:
In 193 reviewed cases of pleuropulmonary infections involving anaerobic bacteria, the predominant clinical syndromes were aspiration pneumonia, lung abscess, and empyema. Most patients had an indolent infection with tissue necrosis (abscess or bronchopulmonary fistula) at initial presentation. Nevertheless, many had a more fulminant disease course resembling that of pneumococcal pneumonia. Transtracheal aspiration was the procedure most commonly used to obtain uncontaminated specimens for anaerobic culture; since this procedure now is seldom employed, pulmonary infections due to anaerobes rarely have an etiologic diagnosis at present. The dominant pathogens are Peptostreptococcus, Bacteroides, Prevotella, and Fusobacterium species. Although clindamycin is widely considered to be the antibiotic of choice, proper therapeutic trials would probably prove many antibiotics to be effective for the treatment of anaerobic pleuropulmonary infections.
Insights
Anaerobic bacteria cause serious lung infections like aspiration pneumonia and lung abscess. Identifying these pathogens is difficult, but effective antibiotic treatments are available.
Area of Science:
- Medicine
- Infectious Diseases
- Pulmonology
Background:
- Pleuropulmonary infections involving anaerobic bacteria present diverse clinical syndromes, including aspiration pneumonia, lung abscess, and empyema.
- Many patients exhibit indolent infections with tissue necrosis, while others experience fulminant disease courses.
- Accurate etiologic diagnosis of anaerobic pulmonary infections is currently infrequent due to the decline in specific diagnostic procedures.
Purpose of the Study:
- To review the clinical features and pathogens associated with anaerobic pleuropulmonary infections.
- To discuss diagnostic challenges and treatment considerations for these infections.
Main Methods:
- Retrospective review of 193 cases of pleuropulmonary infections caused by anaerobic bacteria.
- Analysis of clinical presentations, diagnostic methods, and identified pathogens.
Main Results:
- Predominant syndromes included aspiration pneumonia, lung abscess, and empyema.
- Commonly identified anaerobic pathogens were Peptostreptococcus, Bacteroides, Prevotella, and Fusobacterium species.
- Transtracheal aspiration was a key diagnostic procedure, though now rarely used.
Conclusions:
- Anaerobic bacteria are significant causes of severe pleuropulmonary infections.
- Improved diagnostic techniques are needed for accurate etiologic diagnosis.
- While clindamycin is often used, various antibiotics may be effective in treating these infections.