Pseudomonas aeruginosa bacteria

Pseudomonas aeruginosa

p.aeruginosa images pseudomonas aeruginosa animated image

Pseudomonas aeruginosa is a Gram-negative, rod-shaped, motile organism (polar flagella) which characteristically produce
water-soluble pigments which diffuse through the medium. The best known are pyocyanin (blue-green), pyoverdine (yellow-green,
fluorescent), and pyorubin (red-brown, produced by a small proportion of strains). It is commonly found free living in moist
environments but is also a pathogen of plants, animals, and humans.

Pseudomonas aeruginosa is often preliminarily identified by its typical odor in vitro. The smell is described as grape-like,
tortilla-like or "Philadelphus coronarius-like" (production of aminoacetophenone). It is not an active fermenter of carbohydrates
and produces acid, but no gas, in glucose and is lactose-negative. The oxidase and catalase test for P.aeruginosa are positive.
Although an aerobic atmosphere is necessary for optimal growth, most strains will multiply slowly in an anaerobic environment if
nitrate is present as a hydrogen acceptor. It is able to grow at 42°C. The combination of pyocyanin production and the ability to grow
at 42°C is sufficient to distinguish P.aeruginosa from other Pseudomonas spp. (e.g., P.fluorescens, P.putida, P.stutzeri, P.putrefaciens).
Certain strains of P.aeruginosa may not produce pyocyanin.

Pseudomonas aeruginosa is an opportunistic pathogen that infects burns, wounds, surgical incisions and sites of catheterization.
It is the most common cause of infections of burn injuries and of the outer ear (otitis externa). It can, in rare circumstances, cause
community-acquired pneumonias, as well as ventilator-associated pneumonias.

P. aeruginosahas has immense potential to develop resistance against antibiotic as is evident from the fact that its genome contains
the largest known resistance island with more than 50 resistance genes (Wikipedia). This is an "antibiotic paradox" because the very first antibiotic
to be discovered in the modern world, was pyocyanase, discovered in 1888 by E. de Freudenreich. It was a mixture of several antibacterially active substances: pyocyanin, 1-hydroxyphenazine and an oily fraction.This natural antibiotic was able to kill typhoid, diphtheria and plague bacteria.
Pyocyanase has been produced commercially, but unfortunately it was unstable and toxic. (pyocyanin and 1-hydroxyphenazine are also antifungal agents
active against Candida albican and Aspergillus fumigatus; Kerr J R et al., 1999).

Pseudomonas aeruginosa colonies on blood agar

pseudomonas aeruginosa, e.coli, s.epidermidis bacteria p.aeruginosa, e.coli, s.epidermidis pseudomonas aeruginosa colonies pseudomonas aeruginosa p.aeruginosa beta-hemolytic p.aeruginosa beta-hemolysis pseudomonas aeruginosa on blood agar plate pseudomonas aeruginosa pseudomonas aeruginosa pseudomonas aeruginosa pseudomonas aeruginosa pseudomonas aeruginosa

Pseudomonas aeruginosa on tryptic soy agar

p.aeruginosa colony morphology pseudomonas aeruginosa pyocyanin green pseudomonas aeruginosa, oxidase test p.aeruginosa on tsa green p.aeruginosa, e.faecalis pseudomonas aeruginosa colony pseudomonas aeruginosa, enterococcus, golden staph pseudomonas aeruginosa pseudomonas aeruginosa pseudomonas aeruginosa pseudomonas aeruginosa pseudomonas aeruginosa pseudomonas aeruginosa p.aeruginosa green colonies pyocyanin, pyoverdine

Pseudomonas aeruginosa on MacConkey agar

pseudomonas aeruginosa on macconkey agar colonies of p.aeruginosa pseudomonas aeruginosa and e.coli

Pseudomonas aeruginosa on Endo agar

pseudomonas aeruginosa pseudomonas aeruginosa

Pseudomonas aeruginosa on cetrimide agar

cetrimide agar plate pseudomonas aeruginosa pseudomonas aeruginosa pseudomonas aeruginosa cetrimide agar pseudomonas aeruginosa

Pseudomonas aeruginosa on various cultivation media

p.aeruginosa on various cultivation media pseudomonas aeruginosa pseudomonas aeruginosa

Pseudomonas aeruginosa identification

identification of pseudomonas aeruginosa with api 20 NE

Pseudomonas aeruginosa Gram stain

pseudomonas aeruginosa Gram stain micrograph pseudomonas aeruginosa microscopy

Pseudomonas aeruginosa SEM

pseudomonas aeruginosa pseudomonas aeruginosa pseudomonas aeruginosa pseudomonas aeruginosa

Useful Links

WIKIPEDIA
CENTERS FOR DISEASE CONTROL AND PREVENTION (CDC)
Todar's Online Textbook of Bacteriology
Microbe Wiki (the student-edited microbiology resource)
www.antimicrobe.org
www.vetbact.org
Merck Manual