Spontaneous pneumococcal peritonitis diagnosed by qPCR.

Area of Science:

• Infectious Diseases
• Microbiology
• Diagnostics

Background:

• Spontaneous bacterial peritonitis (SBP) is an uncommon manifestation of invasive pneumococcal disease.
• Hepatic disease is a frequent comorbidity in SBP.
• Bacterial identification via culture is often difficult in patients with prior or concurrent antimicrobial therapy.

Purpose of the Study:

• To describe a case of culture-negative spontaneous pneumococcal peritonitis diagnosed using quantitative polymerase chain reaction (qPCR).
• To highlight the utility of molecular diagnostic methods in challenging infectious disease cases.

Main Methods:

• Utilized quantitative polymerase chain reaction (qPCR) for bacterial DNA detection.
• Analyzed cerebrospinal fluid (CSF) and pleural effusion samples.
• Compared qPCR results with traditional culture methods.

Main Results:

• Successfully diagnosed a case of spontaneous pneumococcal peritonitis that was culture-negative.
• Demonstrated the effectiveness of qPCR in detecting low levels of bacterial DNA.
• Identified pneumococcal infection in a patient without pre-existing peritoneal disease.

Conclusions:

• Quantitative polymerase chain reaction (qPCR) is a valuable tool for diagnosing culture-negative spontaneous bacterial peritonitis.
• Molecular methods like qPCR can overcome limitations of traditional culture techniques, especially in patients with antimicrobial exposure.
• This case underscores the importance of considering invasive pneumococcal disease even in the absence of typical risk factors or positive cultures.