Pseudomonadales

Order of bacteria

Pseudomonadales

Acinetobacter baumannii
Scientific classification
Domain:  | Bacteria
Kingdom:  | Pseudomonadati
Phylum:  | Pseudomonadota
Class:  | Gammaproteobacteria
Order:  | Pseudomonadales
Orla-Jensen 1921
Families and Genera

* Moraxellaceae Rossau et al. 1991
* Pseudomonadaceae Winslow et al. 1917 (Approved Lists 1980)
* Ventosimonadaceae Lin et al. 2016

The Pseudomonadales[1] are an order of Pseudomonadota. A few members are pathogens, such as species of Pseudomonas, Moraxella, and Acinetobacter, which may cause disease in humans, animals and plants.

## Pseudomonas

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The bacterial genus Pseudomonas includes the opportunistic human pathogen P. aeruginosa, plant pathogenic bacteria, plant beneficial bacteria, ubiquitous soil bacteria with bioremediation capabilities and other species that cause spoilage of milk and dairy products. Pseudomonas aeruginosa can cause chronic opportunistic infections that have become increasingly apparent in immunocompromised patients and the ageing population of industrialised societies. The genome sequences of several pseudomonads have become available in recent years and researchers are beginning to use the data to make new discoveries about this bacterium.[2][3]

## Acinetobacter

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The genus Acinetobacter is a group of Gram-negative, nonmotile and nonfermentative bacteria belonging to the family Moraxellaceae. They are important soil organisms where they contribute to the mineralisation of, for example, aromatic compounds. Acinetobacter species are able to survive on various surfaces (both moist and dry) in the hospital environment, thereby being an important source of infection in debilitated patients. These bacteria are innately resistant to many classes of antibiotics. In addition, Acinetobacter is uniquely suited to exploitation for biotechnological purposes.[4]

## See also

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* Gamma-150 RNA motif, a unique RNA structure that is found in bacteria within the order

## References

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1. ^ Flores-Félix, José David; García-Fraile, Paula; Saati-Santamaría, Zaki (May 2025). "Harmony in diversity: Reorganizing the families within the order Pseudomonadales". Molecular Phylogenetics and Evolution. 206: 108321. Bibcode:2025MolPE.20608321F. doi:10.1016/j.ympev.2025.108321. ISSN 1055-7903. PMID 40044097.
2. ^ Cornelis, Pierre (2008). Pseudomonas: Genomics and Molecular Biology (1st ed.). Caister Academic Press. ISBN 978-1-904455-19-6.
3. ^ Saati-Santamaría, Zaki; Selem-Mojica, Nelly; Peral-Aranega, Ezequiel; Rivas, Raúl; García-Fraile, Paula (2022-02-23). "Unveiling the genomic potential of Pseudomonas type strains for discovering new natural products". Microbial Genomics. 8 (2). doi:10.1099/mgen.0.000758. ISSN 2057-5858. PMC 8942027. PMID 35195510.
4. ^ Gerischer, Ulrike (2008). Acinetobacter Molecular Biology (1st ed.). Caister Academic Press. ISBN 978-1-904455-20-2.

## External links

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Wikispecies has information related to Pseudomonadales.

* Spotlight On Acinetobacter

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Pseudomonadota-associated Gram-negative bacterial infections

| Rickettsiales|

| Rickettsiaceae/
(Rickettsioses)|

| Typhus|

* Rickettsia typhi
* Murine typhus
* Rickettsia prowazekii
* Epidemic typhus, Brill–Zinsser disease, Flying squirrel typhus

|

Spotted
fever|

| Tick-borne|

* Rickettsia rickettsii
* Rocky Mountain spotted fever
* Rickettsia conorii
* Boutonneuse fever
* Rickettsia japonica
* Japanese spotted fever
* Rickettsia sibirica
* North Asian tick typhus
* Rickettsia australis
* Queensland tick typhus
* Rickettsia honei
* Flinders Island spotted fever
* Rickettsia africae
* African tick bite fever
* Rickettsia parkeri
* American tick bite fever
* Rickettsia aeschlimannii
* Rickettsia aeschlimannii infection

|

Mite-borne|

* Rickettsia akari
* Rickettsialpox
* Orientia tsutsugamushi
* Scrub typhus

Flea-borne|

* Rickettsia felis
* Flea-borne spotted fever

Anaplasmataceae|

* Ehrlichiosis: Anaplasma phagocytophilum
* Human granulocytic anaplasmosis, Anaplasmosis
* Ehrlichia chaffeensis
* Human monocytotropic ehrlichiosis
* Ehrlichia ewingii
* Ehrlichiosis ewingii infection

Hyphomicrobiales|

| Brucellaceae|

* Brucella abortus
* Brucellosis

|

Bartonellaceae|

* Bartonellosis: Bartonella henselae
* Cat-scratch disease
* Bartonella quintana
* Trench fever
* Either B. henselae or B. quintana
* Bacillary angiomatosis
* Bartonella bacilliformis
* Carrion's disease, Verruga peruana

| Neisseriales|

| M+|

* Neisseria meningitidis/meningococcus
* Meningococcal disease, Waterhouse–Friderichsen syndrome, Meningococcal septicaemia

|

M−|

* Neisseria gonorrhoeae/gonococcus
* Gonorrhea

ungrouped:|

* Eikenella corrodens/Kingella kingae
* HACEK
* Chromobacterium violaceum
* Chromobacteriosis infection

Burkholderiales|

* Burkholderia pseudomallei
* Melioidosis
* Burkholderia mallei
* Glanders
* Burkholderia cepacia complex
* Bordetella pertussis/Bordetella parapertussis
* Pertussis

| Enterobacteriales
(OX−)|

| Lac+|

* Klebsiella pneumoniae
* Rhinoscleroma, Pneumonia
* Klebsiella granulomatis
* Granuloma inguinale
* Klebsiella oxytoca

* Escherichia coli: Enterotoxigenic
* Enteroinvasive
* Enterohemorrhagic
* O157:H7
* O104:H4
* Hemolytic-uremic syndrome

* Enterobacter aerogenes/Enterobacter cloacae

|

Slow/weak|

* Serratia marcescens
* Serratia infection
* Citrobacter koseri/Citrobacter freundii

Lac−|

| H2S+|

* Salmonella enterica
* Typhoid fever, Paratyphoid fever, Salmonellosis

|

H2S−|

* Shigella dysenteriae/sonnei/flexneri/boydii
* Shigellosis, Bacillary dysentery
* Proteus mirabilis/Proteus vulgaris
* Yersinia pestis
* Plague/Bubonic plague
* Yersinia enterocolitica
* Yersiniosis
* Yersinia pseudotuberculosis
* Far East scarlet-like fever

Pasteurellales|

| Haemophilus:|

* H. influenzae
* Haemophilus meningitis
* Brazilian purpuric fever
* H. ducreyi
* Chancroid
* H. parainfluenzae
* HACEK

|

Pasteurella multocida|

* Pasteurellosis
* Actinobacillus
* Actinobacillosis

Aggregatibacter actinomycetemcomitans|

* HACEK

Legionellales|

* Legionella pneumophila/Legionella longbeachae
* Legionnaires' disease
* Coxiella burnetii
* Q fever

Thiotrichales|

* Francisella tularensis
* Tularemia

Vibrionaceae|

* Vibrio cholerae
* Cholera
* Vibrio vulnificus
* Vibrio parahaemolyticus
* Vibrio alginolyticus
* Plesiomonas shigelloides

Pseudomonadales|

* Pseudomonas aeruginosa
* Pseudomonas infection
* Moraxella catarrhalis
* Acinetobacter baumannii

Xanthomonadaceae|

* Stenotrophomonas maltophilia

Cardiobacteriaceae|

* Cardiobacterium hominis
* HACEK

Aeromonadales|

* Aeromonas hydrophila/Aeromonas veronii
* Aeromonas infection

| Campylobacterales|

* Campylobacter jejuni
* Campylobacteriosis, Guillain–Barré syndrome
* Helicobacter pylori
* Peptic ulcer, MALT lymphoma, Gastric cancer
* Helicobacter cinaedi
* Helicobacter cellulitis

|

Taxon identifiers

Pseudomonadales|

* Wikidata: Q133966
* Wikispecies: Pseudomonadales
* CoL: 8ZXYD
* EoL: 325
* EPPO: 1PSDMO
* GBIF: 1474
* iNaturalist: 152369
* IRMNG: 12244
* ITIS: 53
* LPSN: pseudomonadales
* NBN: NHMSYS0020959115
* NCBI: 72274
* NZOR: fae59618-d3b4-464a-916c-2bb1b7a0830b
* Open Tree of Life: 191376
* PPE: pseudomonadales
* WoRMS: 393032

Authority control databases: National |

* Israel

|

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