Does p aeruginosa growth on nutrient agar?
Pseudomonas aeruginosa morphology, growth characteristics and microscopic
appearance of P.aerginosa. Images of Pseudomonas aeruginosa, infections
caused by Pseudomonas aeruginosa.
Microbiology in Pictures.com
- *bacteria* -
** /Pseudomonas aeruginosa/ bacteria **
p.aeruginosa imagespseudomonas 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/,
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
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