Haemophilus
| Haemophilus | |
|---|---|
 |
|
| Haemophilus influenzae on a blood agar plate. | |
| Scientific classification | |
| Kingdom: | Bacteria |
| Phylum: | Proteobacteria |
| Class: | Gammaproteobacteria |
| Order: | Pasteurellales |
| Family: | Pasteurellaceae |
| Genus: |
Haemophilus Winslow et al. 1917 |
| Species | |
|
H. aegyptius |
|
Not to be confused with Haemophilia
H. aegyptius
H. aphrophilus
H. avium
H. ducreyi
H. felis
H. haemoglobinophilus
H. haemolyticus
H. influenzae
H. parainfluenzae
H. paracuniculus
H. parahaemolyticus
H. paraphrohaemolyticus
H. parasuis
H. pittmaniae
H. piscium
H. segnis
H. sputorum
H. somnus
Haemophilus is a genus of Gram-negative, pleomorphic, coccobacilli bacteria belonging to the Pasteurellaceae family. While Haemophilus bacteria are typically small coccobacilli, they are categorized as pleomorphic bacteria because of the wide range of shapes they occasionally assume. These organisms inhabit the mucous membranes of the upper respiratory tract, mouth, vagina, and intestinal tract. The genus includes commensal organisms along with some significant pathogenic species such as H. influenzae—a cause of sepsis and bacterial meningitis in young children—and H. ducreyi, the causative agent of chancroid. All members are either aerobic or facultatively anaerobic.
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