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Propionibacterium shermanii is a subspecies of P. freudenreichii. It is used to make the holes in cheese, because it creates carbon dioxide bubbles.
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What is the optimum pH and temperature for growth of Propionibacterium shermanii?
pH 6.5, 30-35 C
What is p shermanii?
During cheese-making the bacteria are added to certain cheeses such as Emmental (also known as Swiss) and Leerdammer, and when warmed bubbles of carbon dioxide form in the cheese. These bubbles then become the distinctive holes (or eyes) in the finished product. This bacteria can also get you dizzy and sick for a couple of weeks or 2.
How can microbes be used to produce beneficial products?
Microbes have certain uses as listed bellow: 1)helps to prepare wines and some food items like cheese= Propionibacterium shermani(microbe) curd = lactobaccilus ethanol =yeast 2)some drugs /bio molecules cyclosporin A = tricoderma polysporum... statin 3)some acids acetic acid =acetobacter aceti butyric acid=clostridium butylicum 4) lipases=candida lypolitica ; used in laundry 5)proteases and pepteases= give a clear apperence to bottled juices 6) methane(biogas)=methanogen 7)helps in sewage treatment
What illness can cause the pathogenic bacteria?
No, antibiotics are produced to fight against pathogenic bacteria, Vaccines use dead bacteria to stimulate the immune system to fight against and/or to prevent many diseases. Antibiotics are developed using synthetic basis, or from fungus, like penicilin for example.
What are the three basic Theories on the principle of gram staining reactions?
The gram stain is a basic differential stain used to determine if a bacterial cell is gram positive or negative. Gram positive cells have a thick peptidoglycan layer that will trap the crystal violet iodine crystalls and apear purple. Gram negative cells only have a thin peptidoglycan layer that allows the crystals to diffuse out of the cell and will only be seen with the application of a counterstain, such as safranin which turns the cells pink.
When was propionibacterium shermanii discovered?
refer this paper www.pubmedcentral.nih.gov/articlerender.fcgi?artid=186833
What is the optimum pH and temperature for growth of Propionibacterium shermanii?
pH 6.5, 30-35 C
What type of bacteria causes acne?
PROPIONIBACTERIUM
What are the virulence factors for propionibacterium acnes?
The primary virulence factors of propionibacterium acnes are lipase (which helps to break down the yucky oils/lipids on our face), hyaluronidase (which is an enzyme that breaks down the connective tissues and increases the permeability of connective tissues), neuraminidase, proteases, inflammatory mediators, and other enzymes.
What hydrolysis test would a positive test result be expected for the etiologic agent of acne Propionibacterium acnes?
Triglycerides hydrolysis test because this bacterium feeds on fatty acids.
Propionibacterium?
Gram + pleomorphic rods; Diphtheroids 2) Aerotolerant anaerobes, i.e, obligate fermenters - only produce ATP via SLP. 3) Inhabit anaerobic microenvironments of the skin (hair follicles). 4) Produce propionic acid as 1^ fermentation end product. 5) Ferment lactic acid; extract residual energy from a waste product of other bacteria. 6) Propionibacterium acnes - Acne (p. 523)
Are some diseases caused by bacteria?
Yes, there are many. A few are : Actinomyces which cause respiratory diseases and cavities, Propionibacterium which can cause acne and Bortadella which causes pertussis better known as whooping cough.
What is the vector of acne?
one of the major causes of acne is Propionibacterium acne bacteri,although it is a normal bacteria found in skin but it the vector which in certain circumstances can cause blockage of the follicle on the skin surface and result in acne formation
When does moderate and severe inflammatory types of acne occur?
result after the plugged follicle is invaded by Propionibacterium acnes, a bacteria that normally lives on the skin. A pimple forms when the damaged follicle weakens and bursts open, releasing sebum, bacteria, and skin
What is shermanii?
During cheese-making the bacteria are added to certain cheeses such as Emmental (also known as Swiss) and Leerdammer, and when warmed bubbles of carbon dioxide form in the cheese. These bubbles then become the distinctive holes (or eyes) in the finished product. This bacteria can also get you dizzy and sick for a couple of weeks or 2.
What is p shermanii?
During cheese-making the bacteria are added to certain cheeses such as Emmental (also known as Swiss) and Leerdammer, and when warmed bubbles of carbon dioxide form in the cheese. These bubbles then become the distinctive holes (or eyes) in the finished product. This bacteria can also get you dizzy and sick for a couple of weeks or 2.
Propionibacterium (chemoorganotrophs)?
are Gram-positive rods 2) Organisms produce propionic acid as end product of fermentation 2.1) Essential in the production of Swiss cheese 2.2) These organisms can also ferment lactic acid 3) Can extract residual energy from waste product of other organisms
