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Blood culture contaminants Grouped by gram negative vs gram positive vs other as well as never/maybe/probably Some additional
Grouped by gram negative ... Ddx #Diagnosis #Bloodculture
My Patient with Infective Endocarditis (IE) Has Negative Blood Cultures - Did they receive antibiotics prior
Endocarditis (IE) Has Negative ... cause of culture negative ... #Endocarditis #Negative ... #BloodCultures
How to Determine a Contaminant vs True Infection What is the organism? Most common contaminants:
• Coagulase-negative ... Jennifer Babik #BloodCultures
Blood Culture-Negative Infective Endocarditis (BCNIE) Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... cultures remain negative ... ID_fellows #BCNIE #BloodCulture ... #Negative #Infective
Important Biostatistics and Epidemiology Equations Sensitivity = TP / (TP + FN) = true positives / disease
FP + TN) = true negatives ... all positives Negative ... FN + TN) = true negatives ... / all negatives ... Specificity) Negative
Microorganisms Responsible for Infective Endocarditis Native valves: - Streptococcus viridans - Enterococci - Other streptococci
Endocarditis Native ... epidermidis - Gram-negative ... ) - Culture negative ... Enterococci - Gram-negative ... streptococci - Culture negative
Endocarditis Algorithm - Infective vs Noninfective Causes Noninfective: • Malignancy • Autoimmune disease • Systemic infection Native Valve
Systemic infection Native ... Staphylococcus lugdunensis Native ... HACEK • Culture-negative ... epidermidis • Gram-negative ... Enterococcus • Gram-negative
Characteristics of Selected Pneumonias Streptococcus pneumoniae (pneumococcus). Gram-positive diplococci. Haemophilus influenzae. Pleomorphic gram-negative coccobacilli. Staphylococcus aureus. Plump
Pleomorphic gram-negative ... Plump gram-negative ... Gram-negative rods ... Gram-negative rods ... Gram-negative diplococci
Microbiology Antibiogram - Antibiotic Sensitivities Gram Positive Cocci Gram Negative Bacilli Gram Negative Coccobacilli Anaerobes Atypicals #Antibiogram #Antibiotic #Sensitivity #Susceptibility #table #pharmacology
Positive Cocci Gram Negative ... Bacilli Gram Negative
Positive and Negative Likelihood Ratios Calculations #Diagnosis #Likelihood #Ratios #LR #Calculations #Equations #Positive #Negative
Positive and Negative ... Equations #Positive #Negative
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