33 results
Commonly Used Diagnostic Tests for Celiac Disease

Tissue transglutaminase (tTG) IgA antibodies
 - Most reliable noninvasive test
specificity - Falsely negative ... disease) - May be negative ... HLA-DQ8 - High negative ... Reflects response to treatment ... #Diagnosis #Workup
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
blood culture negative ... these bacteria should ... BCNIE #Causes #differential ... #Endocarditis #InfectiousDiseases ... #CNIE #BCNIE #cardiology
Disseminated Gonococcal Infection - Diagnosis and Management Summary

Bacteremic spread of the Gram-negative diplococci Neisseria gonorrhoeae. History
spread of the Gram-negative ... blood cultures should ... the preferred test ... typically part of the workup ... #Microbiology #InfectiousDiseases
Psittacosis 
Pathogen: Chlamydia psittaci - obligate intracellular gram negative
Transmission:
 • Birds are the primary reservoir
 •
intracellular gram negative ... Microimmunofluorescent antibody test ... danger of aerosol) Treatment ... first line of treatment ... #infectiousdiseases
Bacteremia Quick Reference - Treatment Duration

Gram Negative Bacteremia:
 • Avoid: Aminoglycosides and tigecycline
 • Catheters should
Quick Reference - Treatment ... Duration Gram Negative ... • Catheters should ... #Bacteremia #Treatment ... Management #Duration #infectiousdiseases
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
) False-negative ... because false-negative ... sample = 95% • A negative ... Testing #Diagnosis #Workup ... LatentTB #ActiveTB #InfectiousDiseases
Coccidiomycosis - Diagnosis
Diagnosis:
 • Mildly elevated peripheral WBC, Eosinophilia (25%), Elevated ESR, Procalcitonin normal (95%)
 •
trend response to treatment ... immunodiffusion test ... Culture (ElA may be negative ... Coccidioides #Diagnosis #workup ... #infectiousdiseases
Candidemia Workup and Management - IDSA Guidelines
1) Antibiotics
 • Empiric: Echinocandins (e.g. micafungin) for most patients
Candidemia Workup ... Susceptibilities, Negative ... venous line, it should ... Additional metastatic workup ... #candidiasis #treatment
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... microbiological techniques Work-up ... these bacteria should ... Endocarditis #diagnosis #differential ... #workup #infectiousdiseases
Diarrhea Workup and Management Algorithm in Transplant Patients
First Tier Microbiologic-Testing:
1. C. difficile PCR (Stool)
2. CMV qPCR
Diarrhea Workup ... Breath test for ... above testing negative ... #Diarrhea #Workup ... Transplant #diagnosis #differential