What is bacterial pigmentation?

Some of Bacteria capable of producing pigment with different varieties of colors are Agrobacterium aurantiacum, Staphylococcus aureus, Chromobacterium violaceum, Serratia marcescens, Bacillus Spp, Flavobacterium sp, etc. colors are Pink–red, Golden Yellow, Purple, red, Creamy and yellow respectively.

What bacteria produces red pigment on agar?

Serratia marcescens is well known for the red pigmentation it produces called prodigiosin.

What pigment does Serratia marcescens produce?

red pigment prodigiosin
Serratia marcescens is a gram-negative, facultatively-anaerobic bacterium and opportunistic pathogen which produces the red pigment prodigiosin.

Why are bacteria pigmented?

Bacterial/ microbial pigment is also due to response to some chemical that induces bacteria to secrete some secondary metabolites (they may be some pigment or antibiotic or organic compound).

Which pigment is present in cyanobacteria?

chlorophyll a
Cyanobacteria contain only one form of chlorophyll, chlorophyll a, a green pigment.

Do bacteria have Colour?

although many bacteria form white colonies, there are many that have a variety of colors such as yellow, red, orange, pale green, dark green for cyanobacteria etc.

Why do colonies turn red?

Pseudomonas aeruginosa produce pyorubin which gives red color colonies and in some cases the pyocianine (which is blue) change to red by acidification of the culture media.

Can Serratia cause pneumonia?

Currently Serratia is the seventh most common cause of pneumonia with an incidence of 4.1% in the US, 3.2% in Europe and 2.4% in Latin America (51), and the tenth most common cause of bloodstream infection with an incidence of 2.0% amongst hospitalized patients (2).

What are the effects of UV light on Serratia marcescens?

When the experiment was repeated, bacteria mortality was approximately 40-75% for Serratia marcescens exposed to ultraviolet light (at 254 nm) for 15 seconds and about 75-90% bacteria mortality for the 30 second exposure. One minute of exposure time to ultraviolet light resulted in 95-99% bacteria mortality.

Which is the characteristics pigment found in cyanobacteria?

Cyanobacteria possess a pigment Phycocyanin which is a blue photosynthetic pigment. This pigment is produced by cyanobacteria as a phycobiliprotein complex. It gives the cyanobacteria its characteristic bluish colour.

Which is the bacteria that produces red pigment?

A red pigment producing bacteria was isolated from soil sample which was identified by 16S r RNA sequencing as Serratia rubidaea JCM 1204T. The red pigment produced was tested for prodigiosin by presumptive color test, adsorption spectra, and its quantification was carried out on King’s B medium.

Is there a correlation between sputum color and bacterial infection?

In 28 samples (12%) a bacterial infection was proven. Yellowish or greenish colour of the sputum sample and bacterial infection showed a significant correlation (p = 0.014, Fisher’s exact test).

What kind of infection can cause blue violet pigment?

The pigment is less pronounced in young colonies. Chromobacterium violaceum, an agent of localized skin infection or localized lymphadenitis which occasionally causes fatal septicemia elaborates a blue-violet pigment, violacein.

Why does my sputum have a yellowish color?

It has been shown that a yellowish or greenish sputum colour is often related to the bacterial load of patients suffering from COPD exacerbation [16], [17] or patients hospitalized due to respiratory conditions [18].