14 results
Algorithm for the diagnosis of chronic diarrhea.
It is usually impractical to test and treat the many
impractical to test ... before testing ... pick specific tests ... to sort out the ... much smaller differential
Infectious Diarrhea - Laboratory Testing

Clostridium difficile
Salmonella enterica, Shigella spp, Campylobacter spp 
Salmonella enterica serovars Typhi and
Infectious Diarrhea ... - Laboratory Testing ... associated with diarrhea ... #diagnosis #differential ... #Laboratory #Testing
Diarrhea Workup and Management Algorithm in Transplant Patients
First Tier Microbiologic-Testing:
1. C. difficile PCR (Stool)
2. CMV qPCR
Diarrhea Workup ... Microbiologic-Testing ... Microbiologic-Testing ... Breath test for ... Transplant #diagnosis #differential
Chronic Diarrhea - Workup
Osmotic:
 • Consider food diary and trial avoiding certain foods or meds, Consider
Chronic Diarrhea ... hydrogen breath test ... A/P, Consider testing ... / #Chronic #Diarrhea ... Workup #diagnosis #differential
Allopecia - Differential Diagnosis Framework for Hair Loss

Localized / Focal Hair Loss Pattern:
 • Scarring Alopecia:
Allopecia - Differential ... disease • Pull test ... texture at bald spots ... fungi Initial Laboratory ... Tests: • TSH
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
• mouthwash, short-chain ... naproxen and modern tests ... DrugScreening #UDS #Testing ... #Laboratory #diagnosis
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
adults • Blood tests ... Pulmonary function tests ... Bronchoscopy Laboratory ... Sweat chloride test ... Bronchiectasis #pulmonary #differential
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 ... the use of this test ... in BAL does not differentiate ... Galactomannan #Fungal #Testing ... FalsePositives #Laboratory
Causes of Inaccurate Fecal Occult Blood Test Results 

False Positive gFOBT:
Ingestion of nonhuman heme (eg, meat
Fecal Occult Blood Test ... #OccultBlood #Testing ... #Laboratory #FalsePositive ... FalseNegative #Diagnosis #Differential
Summary of Available Tests for Clostridium difficile Infection, in Decreasing Order of Sensitivity
 • Toxigenic culture
Summary of Available Tests ... vegetative cells or spores ... amplification tests ... difficile #CDiff #laboratory ... #diagnosis #testing