Related Experiment Video
Updated: Jul 17, 2026
Forward Genetic Approaches in Chlamydia trachomatis
Published on: October 23, 2013
Case Report: Metagenomic next-generation sequencing applied in diagnosing psittacosis caused by Chlamydia psittaci
1Department of Emergency Internal Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China.
Background:
Chlamydia psittaci is the causative agent of psittacosis in humans, while its rapid identification is hampered due to the lack of specificity of laboratory testing methods.
Case Presentation:
This study reports four cases of C. psittaci infection after contact with a domestic parrot, all belonging to the same family. Common manifestations like fever, cough, headache, nausea, and hypodynamia appeared in the patients. Metagenomic next-generation sequencing (mNGS) aided the etiological diagnosis of psittacosis, revealing 58318 and 7 sequence reads corresponding to C. psittaci in two cases. The detected C. psittaci was typed as ST100001 in the Multilocus-sequence typing (MLST) system, a novel strain initially reported. Based on the results of pathogenic identification by mNGS, the four patients were individually, treated with different antibiotics, and discharged with favorable outcomes.
Conclusion:
In diagnosing psittacosis caused by a rare C. psittaci agent, mNGS provides rapid etiological identification, contributing to targeted antibiotic therapy and favorable outcomes. This study also reminds clinicians to raise awareness of psittacosis when encountering family members with a fever of unknown origin.
Insights
Rapid diagnosis of psittacosis is crucial. Metagenomic next-generation sequencing (mNGS) enabled quick identification of Chlamydia psittaci, leading to effective antibiotic treatment and recovery in four patients.
Area of Science:
- Infectious Diseases
- Microbiology
- Genomics
Background:
- Chlamydia psittaci causes psittacosis in humans.
- Traditional diagnostic methods for psittacosis lack specificity, hindering rapid identification.
- Prompt etiological diagnosis is essential for effective treatment.
Observation:
- Four family members presented with psittacosis after contact with a domestic parrot.
- Clinical manifestations included fever, cough, headache, nausea, and hypodynamia.
- Metagenomic next-generation sequencing (mNGS) was employed for etiological diagnosis.
Findings:
- mNGS identified Chlamydia psittaci in two of the four cases.
- The identified C. psittaci strain was typed as ST100001, a novel strain.
- Patients received targeted antibiotic therapy based on mNGS results, achieving favorable outcomes.
Implications:
- mNGS offers rapid etiological identification for psittacosis diagnosis.
- This facilitates targeted antibiotic therapy and improves patient outcomes.
- Clinicians should consider psittacosis in cases of unknown fever within family clusters.
Related Concept Videos
01:29Bacterial Phylum Chlamydiae
01:14Atypical Pneumonia