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Forward Genetic Approaches in Chlamydia trachomatis
Published on: October 23, 2013
Prostatitis as initial manifestation of Chlamydia psittaci pneumonia diagnosed by metagenome next-generation
Mengjie Li1, Biao Wang1, Peng Liu1
1Department of Respiratory and Critical Care Medicine, Cangzhou Fifth Hospital (People's Hospital of Qingxian), Cangzhou 062650, China.
Abstract:
Chlamydia psittaci (C. psittaci) pneumonia is a zoonotic infectious disease caused by C. psittaci, which is often underdiagnosed. The application of metagenomic next-generation sequencing (mNGS) provides an unbiased method for the detection of unknown pathogens. A 46-year-old man received empirical treatment with piperacillin-tazobactam and moxifloxacin after an initial diagnosis of prostatitis and pneumonia. However, he experienced recurrent symptoms and a cough, and a chest computed tomography (CT) showed aggravated pulmonary inflammation. Upon further questioning, the patient recalled a history of contact with pigeons, and a bronchoscope alveolar lavage fluid analysis with mNGS suggested C. psittaci infection. Following treatment with doxycycline, the patient's symptoms were rapidly alleviated, and chest CT showed pulmonary lesions absorption. The patient was followed up for 1 month without any discomfort. This case highlights that initial manifestations of C. psittaci pneumonia may present with atypical symptoms such as prostatitis. Furthermore, mNGS can be a useful tool for the detection of rare or unknown pathogens such as C. psittaci.
Insights
Chlamydia psittaci pneumonia, a zoonotic disease, is often missed. Metagenomic next-generation sequencing (mNGS) aided in diagnosing this rare infection presenting with atypical prostatitis symptoms, leading to effective doxycycline treatment.
Area of Science:
- Infectious Diseases
- Microbiology
- Pulmonology
Background:
- Chlamydia psittaci (C. psittaci) causes a zoonotic pneumonia that is frequently underdiagnosed.
- Metagenomic next-generation sequencing (mNGS) offers an unbiased approach for identifying novel or rare pathogens.
Observation:
- A 46-year-old male presented with recurrent pneumonia and prostatitis despite empirical antibiotic treatment.
- Patient history revealed contact with pigeons, prompting further investigation.
- Chest CT scans indicated worsening pulmonary inflammation.
Findings:
- Bronchoalveolar lavage fluid analysis using mNGS identified C. psittaci infection.
- Doxycycline treatment rapidly resolved the patient's symptoms and pulmonary lesions.
- The patient recovered fully within a month.
Implications:
- C. psittaci pneumonia can manifest with atypical symptoms, including prostatitis.
- mNGS is a valuable diagnostic tool for identifying challenging or unusual infectious agents like C. psittaci.
- Early and accurate diagnosis improves patient outcomes for zoonotic lung infections.
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