Hosam Mohamed-
sensitivity
Ability to detect disease among those known to have the disease
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true positives/ true positives + false negatives
What is the formula for Sensitivity?
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Specificity
ability to detect the absence of disease among those known to NOT have the disease
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b
Expressed as % of patients without disease who test negative.
a) sensitivity
b) specificity
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a
Expressed as % of patients with disease who test positive.
a) sensitivity
b) specificity
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true negatives/ true negatives + false positives
Formula for Specificity?
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true negatives/ true negatives + false negatives
Formula for Negative predicative value?
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true positives/ true positives + false positives
Formula for positive predicative value?
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positive/negative predicative value
-focuses on the practical usefulness of the test in clinical practice.
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purple; pink
Gram-positive stains _______ while Gram-negative stains _______.
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c
Which susceptibility testing (by hand) is considered the gold standard?
a) epsilometer test
b) disk diffusion
c) broth microdilution
d) gram-stain configuration
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minimum inhibitory concentration (MIC)
-lowest concentration to prevent visible growth
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Minimum bactericidal concentration (MBC)
-lowest concentration required to kill
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a, c
Which tests provide a specific MIC when completed?
a) epsilometer test
b) disk diffusion
c) broth microdilution
d) gram-stain configuration
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a,b
Which tests are fast/easy to complete?
a) epsilometer test
b) disk diffusion
c) broth microdilution
d) gram-stain configuration
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c
Which test is time constraining?
a) epsilometer test
b) disk diffusion
c) broth microdilution
d) gram-stain configuration
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a
Which test is expensive?
a) epsilometer test
b) disk diffusion
c) broth microdilution
d) gram-stain configuration
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b
Which test is not as accurate in determining what is susceptible/not susceptible?
a) epsilometer test
b) disk diffusion
c) broth microdilution
d) gram-stain configuration
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a, g
What type of infections do we test urine samples in?
a) RT infections
b) viral testing
c) CSF infections
d) Intra-abdominal infections
e) skin infections
f) bone/joint infections
g) urine
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a
What type of infections do we conduct PCR of the nares in?
a) RT infections
b) viral testing
c) CSF infections
d) Intra-abdominal infections
e) skin infections
f) bone/joint infections
g) urine
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a, f
Which type of infections do we use X-rays?
a) RT infections
b) viral testing
c) CSF infections
d) Intra-abdominal infections
e) skin infections
f) bone/joint infections
g) urine
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d
Which fungal species will test positive for Beta-D-Glucan?
a) aspergillus
b) cryptococcus
c) Histoplasma
d) candida
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a
Which fungal species will test positive for the cell wall component Galactomannan?
a) aspergillus
b) cryptococcus
c) histoplasma
d) candida
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cryptococcus, histoplasmosis, Blastomyces, coccidioidomycosis
Which fungal species do we utilize antigen detection tests on? (4)
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histoplasmosis, Blastomyces, coccidioidomycosis
What are our Dimorphic fungi? (3)
