114 results
1,3 Beta-D-Glucan and Galactomannan - Pathogens, and Testing Characteristics
1,3 ß-D-glucan:
 • Most fungi excluding mucor and
Pathogens, and Testing ... and pneumocystis False ... other fungi • False ... Galactomannan #Pathogens #Testing ... Characteristics #Sensitivity
1,3-Beta-D-Glucan and Galactomannan Testing Sensitivity Specificity and False Positives
1,3-Beta-D-Glucan
 • Cell wall component of many fungi
Galactomannan Testing ... and False Positives ... BAL samples • False ... mold-active AF • False ... Galactomannan #Fungal #Testing
Sensitivity Specificity False-Positive False-Negative Contingency Table / confusion matrix

Sensitivity refers to the test's ability to correctly
Sensitivity Specificity ... False-Positive ... False-Negative Contingency ... confusion matrix Sensitivity ... #Sensitivity #Specificity
The test characteristics of the heterophile antibody (AKA the monospot test) are not perfect and can
can lead to both false ... positive and false ... Serologies #Titers #Sensitivity
Medications that Can Cause False Positives on Drug Tests

Urine drug screens (UDSs) are simple to use,
that Can Cause False ... Amphetamine false ... Cannabinoid false ... Benzodiazepine false ... Barbiturates false
What is Fecal Occult Blood Testing (FOBT)
 • Screening for colorectal cancer in average risk population
Fecal Occult Blood Testing ... evaluation • False ... cauliflower, ETOH • False ... to unnecessary testing ... #OccultBlood #Testing
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Contributing to False ... (High Rate of False ... NSAlDs resulting in false-positive ... not result in false ... DrugScreening #UDS #Testing
Causes of False Elevation and Reduction in HbA1c

== False Elevation ==
Decreased RBC turnover 
• Iron, B-12,
Causes of False ... in HbA1c == False ... Transfusions == False ... Transfusions #False
Urinalysis Testing - UTI Sensitivity and Specificity
 - Leukocyte esterase 
 - Nitrite 
 - WBCs
Urinalysis Testing ... - UTI Sensitivity ... #Urinalysis #Testing ... #Accuracy #Sensitivity
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
Tuberculosis Testing ... Tuberculin skin testing ... (TST) False-negative ... recommended because false-negative ... #Tuberculosis #Testing