Haemophilus

Not to be confused with Haemophilia.

Haemophilus
Haemophilus influenzae on a Chocolate agar plate.
Scientific classification Edit this classification
Domain: Bacteria
Phylum: Pseudomonadota
Class: Gammaproteobacteria
Order: Pasteurellales
Family: Pasteurellaceae
Genus: Haemophilus
Winslow et al. 1917
Species

H. aegyptius
H. ducreyi
H. felis
H. haemoglobinophilus[1]
H. haemolyticus
H. influenzae
H. parainfluenzae
H. paracuniculus
H. parahaemolyticus
H. paraphrohaemolyticus[1]
H. pittmaniae
H. piscium[1]
H. sputorum[1]

Haemophilus is a genus of Gram-negative, pleomorphic, coccobacilli bacteria belonging to the family Pasteurellaceae.[2][3] 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.[4] 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. This genus has been found to be part of the salivary microbiome.[5]

  1. ^ a b c d "Genus: Haemophilus". lpsn.dsmz.de. Retrieved 24 April 2023.
  2. ^ Holt JG, ed. (1994). Bergey's Manual of Determinative Bacteriology (9th ed.). Williams & Wilkins. ISBN 0-683-00603-7.
  3. ^ Kuhnert P; Christensen H, eds. (2008). Pasteurellaceae: Biology, Genomics and Molecular Aspects. Caister Academic Press. ISBN 978-1-904455-34-9. [1].
  4. ^ Tortora, Gerard J; Funke, Berdell R; Case, Christine L (2016). Microbiology: An Introduction (12th ed.). Boston: Pearson. p. 301. ISBN 978-0321929150. OCLC 892055958.
  5. ^ Wang, Kun; Lu, Wenxin; Tu, Qichao; Ge, Yichen; He, Jinzhi; Zhou, Yu; Gou, Yaping; Nostrand, Joy D Van; Qin, Yujia; Li, Jiyao; Zhou, Jizhong; Li, Yan; Xiao, Liying; Zhou, Xuedong (10 March 2016). "Preliminary analysis of salivary microbiome and their potential roles in oral lichen planus". Scientific Reports. 6 (1): 22943. Bibcode:2016NatSR...622943W. doi:10.1038/srep22943. PMC 4785528. PMID 26961389.