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Bacitracin, Novobiocin and optochin susceptibility test
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Bacitracin is a powerful ____ _____, that inhibits bacterial ____ ____ synthesis. Zone of clearing is?
peptide antibiotic,
cell wall
10 mm or greater around the disk
Bacitracin is only effecive when bacteria have a
cell wall
Novobiocin is a:
antibiotic
interferes w/ ATPase activity & the production of ATP
5 microgram disc should produce a zone of clearing 16 mm or more
Optochin
antibiotic that interferes w/ ATPase activity & ATP production in susceptible bacteria
6mm disc should produce a zone of inhibition 14 mm or more
bacitracin test is used to differentiate and presumptively identify
beta-hemolytic streptococci
staphlylococcus
Novobiocin test is used to differntiate
coagulase- negative staphylococci
presumively identify novobiocin-resistent staphylococcus saprphyticus
Bacitracin test results:
Zone of clearing 10 mm or greater
Zone of clearing less thatn 10mm
organism is sensitive to bacitracin
orgainism is resistnt to bacitracin
Novobiocin test results:
Zone of clearing 16 mm or greater
Zone of clearing less than 16mm
Organism is sensitive to novobiocin
Organism is resistant to novobiocin
Optochin test result:
Zone of clearing 14mm or greater
Zone of clearing less than 14mm
orgainsm is sensitive to optochin
organism is resistant to optochin
Author
ski4me18
ID
74267
Card Set
Bacitracin, Novobiocin and optochin susceptibility test
Description
Bacitracin, Novobiocin and optochin susceptibility test
Updated
2011-03-21T22:14:47Z
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