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purpose of mordant in gram staining

A 29-year-old male asked:
Dr. Ed Friedlander
44 years experience Pathology
For bacteria: The two major families of common bacteria are distinguished by the chemistry of their walls, specifically the ability of iodine to mordant their stain ... Read More

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A 43-year-old member asked:
Dr. Eric Weisman
36 years experience Neurology
Lab test and result: Gram stain is applied with an eye dropper to a slide and taken up by the bacterial. It affects the way bacteria present in concentrated urine appear ... Read More
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A 31-year-old member asked:
Dr. Heidi Fowler
25 years experience Psychiatry
PCR: Diagnosis of chlamydia is by polymerase chain reaction with an endocervical swab for females or a urethral swab or urine specimen for men.
A 38-year-old member asked:
Dr. Eric Weisman
36 years experience Neurology
As a sphere: A solitary sphere or as in the case of streptococci as a chain or as in staphlococci as a bunch like grapes on a vine. This is streptococcus under ... Read More
A 36-year-old member asked:
Dr. Robert Woods
30 years experience Psychiatry
Neither Is Better: Gram staining is a bacteriological laboratory technique used to differentiate bacterial species into two large groups based on the physical properties ... Read More
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A 52-year-old member asked:
Dr. Jose Prieto-hernandez
36 years experience Infectious Disease
Gram positive cocci: You need to do a gram stain to see gram positive organisms like Staphylococci which are gram positive. S. epidermidis is coagulate negative while Stap ... Read More
A 34-year-old member asked:
Dr. Michael Ein
48 years experience Infectious Disease
Gram Positive: Staphylococcus epidermidis is always gram positive.
A 15-year-old male asked:
Dr. James Loflin
35 years experience Urgent Care
Gram Negative: Gram-negative bacteria are bacteria that do not retain crystal violet dye in the gram staining protocol. In a gram stain test, a counterstain is added ... Read More
A 50-year-old male asked:
Dr. Louis Esquivel
35 years experience Holistic Medicine
Infection?: Gram stain of any body fluid or tissue is for microscopic visualization of bacteria and other organisms. Cult refers to "culture" which is where the ... Read More
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A 25-year-old female asked:
Dr. Julie Abbott
45 years experience Preventive Medicine
This could be normal: Bacteria are classified, broadly, as being gram-negative or gram-positive (retains violet dye color after staining--gram stain-- a lab slide with spec ... Read More

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