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BMS2052 - Microbes in health and disease - S2 2025
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The nuc gene is:
Antibodies on the latex particles used in the BACTiStaph test bind to clumping factor and Protein A on the surface of Staphylococcus epidermidis.
The BACTiStaph test is performed on:
The catalase reagent (H2O2) is stored in the cold room in the PC2 laboratory. What does this imply about how the reagent should be handled?
The catalase test is considered positive if bubbles are seen on the glass slide upon mixing bacterial cells with hydrogen peroxide. What do the bubbles indicate?
What is the percentage of H2O2 used in the catalase test?
The catalase test should not be performed using bacterial cells taken from a blood agar plate because blood cells:
A student performed a Gram stain on a gram positive organism but forgot the Gram’s iodine step. What colour would the cells appear upon viewing with a light microscope?
When preparing a heat fixed smear of bacterial cells taken from a plate culture, a loopful of ________ must be added to the glass slide to dilute the sample.