Asked by: Mamadou De Bandera
asked in category: General Last Updated: 10th March, 2020

Is Staphylococcus aureus catalase positive or negative?

Staphylococci are facultative anaerobes that grow by aerobic respiration or by fermentation that yields principally lactic acid. The bacteria are catalase-positive and oxidase-negative. S. aureus can grow at a temperature range of 15 to 45 degrees and at NaCl concentrations as high as 15 percent.

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Consequently, is Staphylococcus catalase positive or negative?

Staphylococcus and Micrococcus spp. are catalase positive, whereas Streptococcus and Enterococcus spp. are catalase negative. If a Gram-positive cocci is catalase positive and presumed to be a staphylococci, the coagulase test is often performed.

Beside above, is Staphylococcus aureus indole positive or negative? aureus isolates, 17 (85%) were found as positive for coagulase, catalase, methylene red, Voges-proskauer and hemolysis tests and negative for oxidase and indole tests. They also produce acid from glucose, lactose and sucrose.

In respect to this, why is Staphylococcus aureus catalase positive?

aureus is catalase-positive (meaning that it can produce the enzyme catalase) and able to convert hydrogen peroxide (H2O2) to water and oxygen, which makes the catalase test useful to distinguish staphylococci from enterococci and streptococci.

What bacteria are catalase negative?

coli, Enterobacter, Klebsiella, Shigella, Yersinia, Proteus, Salmonella, Serratia), Pseudomonas, Mycobacterium tuberculosis, Aspergillus, Cryptococcus, and Rhodococcus equi. If not, the organism is 'catalase-negative'. Streptococcus and Enterococcus spp. are catalase-negative.

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