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Published on: November 5, 2019
First reported survival of anthrax meningoencephalitis in a low-incidence region: successful management with
Qiushuo Geng1,2, Ye Wang3, Yihao Fan4
1School of Medical Device, Shenyang Pharmaceutical University, Benxi, China.
Abstract:
We report a rare survival case of anthrax meningoencephalitis in a 56-year-old male from a low-incidence region. The patient presented with nasal discharge, fever, headache, and rapid onset of coma following the slaughter of a diseased cow. Physical examination revealed a characteristic ulcerative eschar on the right index finger, while laboratory investigations showed significant leukocytosis and hemorrhagic cerebrospinal fluid (CSF) characterized by elevated protein and decreased glucose levels. Although initial microscopy misidentified the pathogen as Bacillus cereus, metagenomic next-generation sequencing (mNGS) of the CSF confirmed Bacillus anthracis within 48 hours. This rapid molecular diagnosis enabled a timely switch to a CDC-recommended combination regimen, initially with quadruple therapy (penicillin G, ciprofloxacin, amikacin, and linezolid) followed by optimization to triple therapy (penicillin G, levofloxacin, and linezolid) during the ICU stay, ultimately leading to the patient's full neurological recovery. This case underscores that the synergistic use of rapid mNGS-based diagnosis and appropriate combination therapy is critical for achieving survival in anthrax meningoencephalitis.
Insights
A rare case of anthrax meningoencephalitis survived due to rapid metagenomic next-generation sequencing (mNGS) diagnosis and effective combination antibiotic therapy. This approach is crucial for improving survival rates in severe Bacillus anthracis infections.
Area of Science:
- Infectious Diseases
- Neurology
- Microbiology
Background:
- Anthrax meningoencephalitis is a rare and often fatal complication of Bacillus anthracis infection.
- Early diagnosis and prompt treatment are critical for patient survival.
Purpose of the Study:
- To report a rare survival case of anthrax meningoencephalitis.
- To highlight the role of rapid molecular diagnostics and combination therapy in patient recovery.
Main Methods:
- Case report of a 56-year-old male with anthrax meningoencephalitis.
- Metagenomic next-generation sequencing (mNGS) for pathogen identification in cerebrospinal fluid (CSF).
- Administration of CDC-recommended quadruple and triple antibiotic combination regimens.
Main Results:
- Initial microscopy misidentified Bacillus anthracis as Bacillus cereus.
- mNGS confirmed Bacillus anthracis in CSF within 48 hours, enabling timely treatment adjustment.
- The patient achieved full neurological recovery following combination antibiotic therapy.
Conclusions:
- Rapid mNGS-based diagnosis is vital for identifying Bacillus anthracis in meningoencephalitis.
- Synergistic combination therapy, guided by rapid diagnostics, significantly improves survival outcomes.
- This case emphasizes the importance of advanced molecular techniques in managing rare infectious diseases.
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