Fusobacterium vincentii brain abscesses are relatively rare. Here, we report our treatment of an anaerobic brain abscess caused by a mixed infection of Parvimonas micra, Streptococcus constellatus, Fusobacterium vincentii, and Bacteroides heparinolyticus diagnosed by metagenomic next-generation sequencing (mNGS). This is the first reported case of Fusobacterium vincentii in a brain abscess. This case highlights the possibility that oral anaerobic microbes can cause a brain abscess and demonstrates that mNGS has the potential to be deployed to provide rapid infection diagnosis and rationalize antimicrobial therapy for brain abscesses.

Human infection with Chlamydia psittaci is rare but difficult to recognize. We report an outbreak of psittacosis among poultry processing workers in China. We applied metagenomic next-generation sequencing and identified Chlamydia psittaci reads from samples of all seven patients, four of which were subsequently confirmed by PCR. Epidemiological results suggested that the poultry processed in the factory was the possible source of human infection.