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How does the cell wall aid in classifying bacteria?
Bacteria fall under 2 categories based on their cell wall, either Gram positive or Gram negative. The bacterial cell wall is composed of peptidoglycan. A special staining technique called Gram staining is used to differentiate between these bacteria. Gram positive bacteria, containing a thick layer of peptidoglycan, will retain/absorb more of the crystal violet dye and appear purple/blueish after being stained. Gram negative bacteria contain an outer membrane which Gram positive bacteria do not. Also the peptidoglycan layer is much thinner compared to that of a Gram positive bacteria. This thinner layer will not absorb as much of the crystal violet dye as compared to the Gram positive bacteria. When a counterstain is added, the Gram negative bacteria will appear reddish/pinkish. Cliff notes Bacteria classified as either - Gram Positive -Gram Negative Gram Positive - No outer membrane - Thick layer of peptidoglycan - Will appear purple when stained Gram negative - Contain an outer membrane - Thin layer of peptidoglycan - Will appear reddish/pink when stained
What is Phylum Gram-Positive?
Bacteria are those that are stained dark blue or violet by Gram Staining.
Can a Gram stain a prion?
Protists are often stained using a silver stain, not a Gram stain.
Is tubercluosis a viral disease?
Tuberculosis etiology is cause by Mycobacterium a gram + rod, it is dormant during anerobic condition but deadly during aerobe.
Is Mycobacteria gram negative or positive?
If you have done your gram stain properly the mycobacterium will appear to be gram positive, however an acid fast stain is necessary because of the extremely long hydrocarbon chains and the high lipid content in the cell wall. The high lipid content makes the cell wall waxy. Both of these make the cell fairly impermeable to stains.
What are the gram reaction of mycobacterium?
Whar are the gram reaction of mycobacterium?Type your answer here...
Is it Ecoli a fastidious organism?
It is not fastidious, it is a gram negative organisms. To be precise fastidious organisms are those which could be stained with any of the dyes eg mycobacterium tuberculosis
Gram stain and shape of mycobacterium avium?
Mycobacterium avium is gram-positive and is the shape of bassilous. What I don't understand is why people can't just look this up.... :-/
How does a stained smear of S epi and E coli made from 7-day-old cultures would appear?
A 7-day-old culture may appear gram negative, when the organmisms are actually gram positive. Thus, S. epi would appear gram negative, and E. coli gram negative.
Is Staphylococcus saprophyticus gram positive or negative?
Yes. Staphylococci are classified as gram positive bacteria and appear as purple spheres when Gram stained.
What is gram stain of candida?
Candida is a fungi and cannot be gram stained. Only bacterias can be gram stained as either positive or negative.
Is mycolic acid found in gram positive and gram negative cell wall composition?
mycobacterium
What clinical specimens are gram stained?
The clinical specimens that are gram stained are microorganism, bodily fluids and sputum specimen. Gram staining makes it easier for the identification of organisms.
What is bycobacteria?
There is no listing for bycobacteria. Mycobacterium are groups of bacteria that are responsible for conditions such as leprosy and tuberculosis. Mycobacterium are generally considered gram positive strains of bacteria.
What is a gram stain for hpv?
HPV is a virus. Viruses aren't gram stained.
Mycobacterium (Aerobic Chemoorganotrophs)?
Gram-positive bacterium, live on dead and decaying matter
Why was Neptunium gram stained?
Because all morphological forms are gram-negative. A.C.
