21 results
Stool Cultures - Indications in Diarrhea
Patient Categories to Order Stool Cultures On:
 • Persisting 1 week
Stool Cultures - ... IBD, age > 70, pregnant ... Few infectious causes ... of acute gastroenteritis ... 196 (1.5%) had a positive
Algorithm for the Evaluation of Acute Diarrhea (< 7 days)
Are the following present?
   1.
Evaluation of Acute ... Routine stool culture ... while awaiting culture ... positive 2. ... Hospitalization required #Acute
Acute Fatty Liver of Pregnancy (AFLP)
Pathophysiology:
 • Defect in fetal free fatty acid metabolism products →
Acute Fatty Liver ... of Pregnancy (AFLP ... : • Defect in fetal ... = nonspecific (nausea ... headache, malaise) → Acute
13 Dangerous Causes of Headache:
 - subarachnoid hemorrhage: family history, PCKD, known berry aneurysm, sudden and
13 Dangerous Causes ... head in dependent position ... or at work) - acute ... preeclampsia: late pregnancy ... #Dangerous #Deadly
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
are positive in ... Acute: • S. ... Septic Emboli Cause ... Injury By: • Early ... Treat underlying cause
Causes of Anemia with Normal Mean Corpuscular Volume (MCV) - Differential Diagnosis Algorithm
Decreased WBCs
 - Decreased/NormaI
Causes of Anemia ... Normal RBCs • Acute ... Hypothyroid • Pregnancy ... • Early Iron ... Diagnosis #Algorithm #Causes
Endocarditis Algorithm - Infective vs Noninfective Causes
Noninfective:
 • Malignancy
 • Autoimmune disease
 • Systemic infection
Native Valve
vs Noninfective Causes ... Native Valve - Acute ... • HACEK • Culture-negative ... Prosthetic Valve - Early ... #Noninfective #Causes
Acute Hypoxemia - Differential Diagnosis
 • Hyperacute: Aspiration, Flash Pulmonary Edema, Mucous Plugging, Bronchospasm, Pulmonary Embolism,
Acute Hypoxemia ... Advanced COPD • Dead ... Embolism, Emphysema, Positive ... Differential #Diagnosis #causes
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
Proves cause-effect ... 100%, then all positive ... proportion of positive ... = incidence in acute ... Lead-time bias: early
Widened Pulse Pressure - Differential Diagnosis and Pathophysiology

Pulse pressure is the difference between the systolic blood
Physiologic Causes ... arteries) • Pregnancy ... Pathologic Causes ... significantly positive ... Diagnoses: • Acute