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G. Iglesias F2013
Modified by DYH
Pseudomonas aeruginosa
• Family Pseudomonadaceae
• Gram-negative rod
• Opportunistic pathogens of
o Plants
o Animals
o Humans
• Gammaproteobacteria
• Ubiquitous microorganism
http://www.waterscan.rs/images/virusibakterije//Pseudomonas%20aeruginosa.jpg
o Can live in inanimate and human
environments
• Aerobic nonfermentor
• Infections include
o
o
o
o
Pulmonary (cystic fibrosis patients)
Life-threatening burn wounds
External otitis
Eye infection from contaminated
contact fluid
http://www.bravofilters.com/test/wpcontent/uploads/2011/07/skin-231x300.png
G. Iglesias F2013
Modified by DYH
Pseudomonas aeruginosa
• Pathogenicity involves the use of
toxins
o Exotoxin A – hinders protein
translation
o ExoU (exoenzyme) – membrane
degradation leads to lysis
• Immunocompromised attacking
strains are non-mucoid
• Antibiotic resistance can be attributed
to P. aeruginosa’s development of
biofilm
o Allow communities’ adherence to a
variety of surfaces
o Difficult to destroy
o Depending on location, can be
beneficial or detrimental to
environment
5 stages of Biofilm Development
http://microbewiki.kenyon.edu/images/b/ba/P.aerugenosa_bi
ofilm.jpg

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