12 results
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
blood culture negative ... under BCNIE, these bacteria ... causes #culture #negative ... #Endocarditis #InfectiousDiseases ... #Microbiology #
Diarrhea Workup and Management Algorithm in Transplant Patients
First Tier Microbiologic-Testing:
1. C. difficile PCR (Stool)
2. CMV qPCR
Diarrhea Workup ... Bacterial culture ... Breath test for bacterial ... above testing negative ... #Diarrhea #Workup
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... cultures remain negative ... microbiological techniques Work-up ... #differential #workup ... #infectiousdiseases
Disseminated Gonococcal Infection - Diagnosis and Management Summary

Bacteremic spread of the Gram-negative diplococci Neisseria gonorrhoeae. History
spread of the Gram-negative ... typically part of the workup ... Diagnosis #Management #Microbiology ... #InfectiousDiseases
Tuberculosis Testing

LATENT TB
• LTBI is diagnosed when an asymptomatic patient has a positive TST or IGRA
TB AFB smear microscopy ... 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%)
 •
lobes (unlike bacterial ... Culture (ElA may be negative ... Coccidioides #Diagnosis #workup ... #infectiousdiseases
Solid Organ Transplant - Diarrhea - Diagnostic and Workup Algorithm
1st Tier Microbiologic Testing: CDiff (stool), CMV
Diagnostic and Workup ... Algorithm 1st Tier Microbiologic ... pathogens 2nd Tier Microbiologic ... overgrowth If above negative ... SolidOrgan #Diagnosis #Workup
Important Fungal Stains
Mycology Lab:
 • Calcofluor white - Fluorochrome that binds glucans and chitin in fungal
• India ink - "Negative ... Fungal #Stains #microbiology ... #microscopy #staining ... fungus #comparison #table
Capnocytophaga spp on Culture and Blood Smear
Associated w/ dog/human oral flora, can cause bacteremia in immunocompromised
flora, can cause bacteremia ... anaerobe; narrow Gram negative ... Smear #clinical #microscopy ... #microbiology
Aeromonas spp - Diagnosis and Management Summary
Aeromonas spp: Gram-negative Rods, oxidase positive and glucose fermenter.
Virulence: Toxin
Aeromonas spp: Gram-negative ... toxin secretion, bacterial ... aquatic injury • Bacteremia ... Diagnosis #Management #microbiology ... #InfectiousDiseases