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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| Language: | English |
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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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| author | Jane Qu Sunil R. Ramaswamy Rodolfo M. Alpizar-Rivas |
| author_facet | Jane Qu Sunil R. Ramaswamy Rodolfo M. Alpizar-Rivas |
| author_sort | Jane Qu |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-9a948d7d40ee47fda1d2d437fb063aeb |
| institution | OA Journals |
| issn | 2767-7664 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | American College of Physicians |
| record_format | Article |
| series | Annals of Internal Medicine: Clinical Cases |
| spelling | doaj-art-9a948d7d40ee47fda1d2d437fb063aeb2025-08-20T02:11:43ZengAmerican College of PhysiciansAnnals of Internal Medicine: Clinical Cases2767-76642024-11-0131110.7326/aimcc.2023.0473A Case of Haemophilus haemolyticus MeningitisJane Qu0Sunil R. Ramaswamy1Rodolfo M. Alpizar-Rivas21University of Rochester Medical Center, Department of Medicine, Rochester, New York2University of California, Riverside, Department of Medicine, Riverside, California1University of Rochester Medical Center, Department of Medicine, Rochester, New YorkHaemophilus 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.https://www.acpjournals.org/doi/10.7326/aimcc.2023.0473 |
| spellingShingle | Jane Qu Sunil R. Ramaswamy Rodolfo M. Alpizar-Rivas A Case of Haemophilus haemolyticus Meningitis Annals of Internal Medicine: Clinical Cases |
| title | A Case of Haemophilus haemolyticus Meningitis |
| title_full | A Case of Haemophilus haemolyticus Meningitis |
| title_fullStr | A Case of Haemophilus haemolyticus Meningitis |
| title_full_unstemmed | A Case of Haemophilus haemolyticus Meningitis |
| title_short | A Case of Haemophilus haemolyticus Meningitis |
| title_sort | case of haemophilus haemolyticus meningitis |
| url | https://www.acpjournals.org/doi/10.7326/aimcc.2023.0473 |
| work_keys_str_mv | AT janequ acaseofhaemophilushaemolyticusmeningitis AT sunilrramaswamy acaseofhaemophilushaemolyticusmeningitis AT rodolfomalpizarrivas acaseofhaemophilushaemolyticusmeningitis AT janequ caseofhaemophilushaemolyticusmeningitis AT sunilrramaswamy caseofhaemophilushaemolyticusmeningitis AT rodolfomalpizarrivas caseofhaemophilushaemolyticusmeningitis |