10 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
Capnocytophaga
Pathogen: Capnocytophaga
 • 9 species, C. canimorsus responsible for the majority of infections
 • Gram-negative rod,
9 species, C. canimorsus ... infections • Gram-negative ... microorganism (Culture ... fusiform gram-negative ... #canimorsus #microbiology
Capnocytophaga Canimorsus Skin Rash

40 M presents w/ N, V, severe epigastric pain. SHx: smoker, drinks 18
Capnocytophaga Canimorsus ... gram-negative bacillus ... Myocarditis & culture-negative ... is difficult to culture ... #dermatology #clinical
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
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
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
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Hypercoagulable (APLAS) Microbiology ... : Blood cultures ... • Coagulase-negative ... • Blood cultures ... -> TEE • Duke Criteria
Guide to Interpretation of Positive Blood Cultures

I arrange the potential Gram stain results that one can
Interpretation of Positive Blood ... Remember that clinician ... call from the micro ... reason to go to micro ... Interpretation #Laboratory #Microbiology
Endocarditis - Overview and Differential Diagnosis Framework

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV
Hypercoagulable (APLAS) Microbiology ... : Blood cultures ... Negative: • Bartonella ... Diagnosis: • Blood ... → TEE • Duke Criteria