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Tag: Gram Positive Cocci

link to Salt Tolerance Test for Enterococcus species

Salt Tolerance Test for Enterococcus species

Salt tolerance test is used in the identification of enterococcal group D Streptococcus on the basis of their salt tolerance. The ability of the bacteria to grow in the presence of a variable amount...

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link to PYR Test: Principle, Procedure, Results

PYR Test: Principle, Procedure, Results

Pyrrolidonyl Arylamidase (PYR) test is a rapid test that is used for the presumptive identification of group A beta-hemolytic streptococci and enterococci. PYR test is also used for the...

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link to Catalase test: Principle, Procedure, Results, Uses

Catalase test: Principle, Procedure, Results, Uses

Catalase test is done to detect the presence of enzyme catalase, which is produced by microorganisms living in oxygenated environments. They use catalase enzyme to neutralize the bactericidal effects...

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link to Gram-Positive vs. Gram-Negative Bacteria

Gram-Positive vs. Gram-Negative Bacteria

Gram stain is the most important staining procedure in Microbiology. Most bacteria can be broadly classified as Gram-positive or Gram-negative. Gram-positive bacteria stain purple, whereas...

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link to Anti-streptolysin O Titer (ASOT): Principle, Procedure, and Results

Anti-streptolysin O Titer (ASOT): Principle, Procedure, and Results

Most people infected with group A streptococci produce anti-streptolysin O (ASO) antibodies. In infections caused by β-hemolytic streptococci,  streptolysin-O is one of the two hemolytic...

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link to Novobiocin Susceptibility Test: Principle, Procedure, Results

Novobiocin Susceptibility Test: Principle, Procedure, Results

Novobiocin test is used to differentiate coagulase-negative staphylococci (CONS) and presumptively identify the isolate as Staphylococcus saprophyticus  (novobiocin resistant).  It is...

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