34 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 ... #Ddx #Diagnosis
How to Determine a Contaminant vs True Infection 

What is the organism? Most 
common contaminants:
• Coagulase-negative ... How many blood culture ... Can check antibiograms ... species from the micro ... Contamination #Diagnosis
Guide to Interpretation of Positive Blood Cultures

I arrange the potential Gram stain results that one can
Positive Blood Cultures ... call from the micro ... reason to go to micro ... Interpretation #Laboratory #Microbiology ... #Diagnosis
Streptocccus Pneumoniae
Microbiology: Gram Positive, Alpha-hemolytic, Catalase Negative
Epidemiology - 10% adult carriers:
 • Most common cause of:
Alpha-hemolytic, Catalase Negative ... common cause of: CAP ... sinus • Sputum culture ... Specificity of 97%) Treatment ... #diagnosis #management
Psittacosis 
Pathogen: Chlamydia psittaci - obligate intracellular gram negative
Transmission:
 • Birds are the primary reservoir
 •
intracellular gram negative ... hemoptysis, diarrhea Diagnosis ... test • PCR • Culture ... Chlamydia #psittaci #microbiology ... #diagnosis #management
Diarrhea Workup and Management Algorithm in Transplant Patients
First Tier Microbiologic-Testing:
1. C. difficile PCR (Stool)
2. CMV qPCR
Diarrhea Workup ... and Management Algorithm ... Bacterial culture ... above testing negative ... #Transplant #diagnosis
Cryptogenic Organizing Pneumonia (COP)

Cryptogenic Organizing Pneumonia Overview:
 • Idiopathic form of organizing pneumonia
 • formerly BOOP
, sputum culture ... Organizing Pneumonia Treatment ... #BOOP #pulmonary ... #ILD #diagnosis ... #management
Septic Arthritis - Diagnosis and Management Summary
Clinical Exam: hot, swollen, pain with passive AND active ROM
and Management ... viral arthritis Workup ... Treatment: admission ... staphylococcus, gram negative ... until cultures
CAPD-associated peritonitis (Continuous Ambulatory Peritoneal Dialysis) - 5 Things To Know
Diagnosis (Two of the following):
(1) Clinical
CAPD-associated ... Things To Know Diagnosis ... Microbiology: • ... diverticulitis) Treatment ... #Management #InfectiousDiseases
Coccidiomycosis - Diagnosis
Diagnosis:
 • Mildly elevated peripheral WBC, Eosinophilia (25%), Elevated ESR, Procalcitonin normal (95%)
 •
trend response to treatment ... (ElA may be negative ... 7 days to grow culture ... skin & joints - Can ... #workup #infectiousdiseases