14 results
Blood culture contaminants
Grouped by gram negative vs gram positive vs other as well as never/maybe/probably
Some additional
Blood culture contaminants ... Grouped by gram negative ... #Infections #Microbiology ... #Micro #Differential ... #Bloodculture #Bloodcx
Duke's Criteria for Infective Endocarditis
Definite IE - Pathologic Criteria:
 • Pathologic lesions - vegetation or intracardiac
major clinical criteria ... blood cultures ... from 2 separate blood ... Single positive blood ... Immunologic phenomena • Micro
Capnocytophaga spp on Culture and Blood Smear
Associated w/ dog/human oral flora, can cause bacteremia in immunocompromised
Capnocytophaga spp ... anaerobe; narrow Gram negative ... #Culture #Blood ... #Smear #clinical ... #microscopy #microbiology
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
Causes of blood ... culture negative ... BCNIE #Causes #differential ... #negative #Endocarditis ... InfectiousDiseases #Microbiology
Diagnosing Brucellosis
Epidemiological Exposures
- Endemic Regions
- Clinical Micro Lab Technicians
- Animal/Vaccine Exposure: Vets, Slaughterhouse workers, hunters
- Unpasteurized
Endemic Regions - Clinical ... Micro Lab Technicians ... Diagnostics: Culture ... (blood, bone marrow ... Brucellosis #Diagnosis #Criteria
Bandemia Overview

Normal: < 1%
Clinically significant: > 10%

Band neutrophils are slightly less mature than segmented neutrophils and
Normal: < 1% Clinically ... of peripheral blood ... , including blood ... likelihood of negative ... clinical outcomes
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... after 3 separate blood ... negative for 7 ... antimicrobials, clinical ... Endocarditis #diagnosis #differential
Diarrhea Workup and Management Algorithm in Transplant Patients
First Tier Microbiologic-Testing:
1. C. difficile PCR (Stool)
2. CMV qPCR
Patients First Tier Microbiologic-Testing ... CMV qPCR (Serum/Blood ... Bacterial culture ... above testing negative ... Transplant #diagnosis #differential
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
: Blood cultures ... • Coagulase-negative ... Marantic (NTBE) Differential ... • Blood cultures ... -> TEE • Duke Criteria
Acinetobacter baumanii on culture and microscopy
 - MacConkey agar - Lactose Negative
 - gram negative (often
- gram negative ... violet esp. from blood ... Acinetobacter #baumanii #clinical ... #microscopy #microbiology ... #culture