A Case of Haemophilus haemolyticus Meningitis
Haemophilus haemolyticus is a gram-negative bacillus respiratory tract commensal with reduced capacity to invade mucosal epithelia. Nontypeable (that is, nonencapsulated) Haemophilus influenzae and H haemolyticus are difficult to differentiate from each other but, due to advancements in genotype ass...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American College of Physicians
2024-11-01
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| Series: | Annals of Internal Medicine: Clinical Cases |
| Online Access: | https://www.acpjournals.org/doi/10.7326/aimcc.2023.0473 |
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| Summary: | Haemophilus haemolyticus is a gram-negative bacillus respiratory tract commensal with reduced capacity to invade mucosal epithelia. Nontypeable (that is, nonencapsulated) Haemophilus influenzae and H haemolyticus are difficult to differentiate from each other but, due to advancements in genotype assays, H haemolyticus has been found to cause invasive disease. We describe a rare case of H haemolyticus bacteremia and meningitis in a 50-year-old man who presented with altered sensorium. He was found to have a low IgM level, leading to speculation that a decreased immune system contributed to his presentation. However, he ultimately declined further immunosuppressive work-up. |
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| ISSN: | 2767-7664 |