Bacitracin, Novobiocin and optochin susceptibility test

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

74267

Card Set

Bacitracin, Novobiocin and optochin susceptibility test

Description

Bacitracin, Novobiocin and optochin susceptibility test

Updated

2011-03-21T22:14:47Z