Ravi Singh K @rav7ks
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Academic Hospitalist and Program Director @SinaiBmoreIMRes, Medicine clerkship director GW School of Medicine and Health Sciences RMC at Sinai, Clinical reasoning,Simulation and POCUS enthusiast - https://twitter.com/rav7ks
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Common Encountered Infections by Location

 • Skin and Soft Tissue Infections
 • Pneumonia
 • Intra-abdominal Infections
Common Encountered Infections ... and Soft Tissue Infections ... Intra-abdominal Infections ... • UTI #infections ... #differential #
Ear Pain (Otalgia) - Differential Diagnosis Framework

Primary Otalgia 
 - Pain that originates from the ear
Pain (Otalgia) - Differential ... associated with infection ... (90%), Fungal infections ... the tragus to differentiate ... Otolaryngology #differential
Common Variable Immunodeficiency (CVID)

What?
CVID: Immunodeficiency disorder with hypogammaglobulinemia -> increased infection risk secondary to impaired B-cell
history of recurrent infections ... disease • Infectious ... community-acquired infections ... and M panel Management ... hematology #diagnosis #management
Fever Patterns - Differential Diagnosis Framework

Continuous Fever:
Temp > 38°C with only 1 degree fluctuation in 24
Fever Patterns - Differential ... and bacterial infections ... • Rickettsiae infections ... Pyogenic/focal infection ... Fever #Patterns #Differential
Waterborne Infections - Differential Diagnosis Framework

Infections that can be acquired from fresh water, brackish water, sea
Waterborne Infections ... - Differential ... Diagnosis Framework Infections ... Escherichia coli O157:H7 Infection ... #Differential #
Bandemia Overview

Normal: < 1%
Clinically significant: > 10%

Band neutrophils are slightly less mature than segmented neutrophils and
Neutrophil (Normal) Differential ... predictive of a serious infection ... overlook severe infections ... superior indicator of infection ... #Bandemia #differential
CNS Infection in HIV / AIDS - Differential Diagnosis Framework

Principles of HIV-Associated CNS Opportunistic Infections:
 •
CNS Infection in ... HIV / AIDS - Differential ... Opportunistic Infections ... opportunistic infections ... #differential #
Causes of Pseudocellulitis - Differential Diagnosis Framework for Cellulitis Mimics

Cellulitis: Deep skin and subcutaneous fat infection

Pseudo
Pseudocellulitis - Differential ... subcutaneous fat infection ... hypodermis from a non-infectious ... However, many non-infectious ... Pseudocellulitis #Differential
Cold Agglutinin Disease

3 Types of Cold Sensitive Antibodies:
  1. Cold Agglutinins (CAD)
  2. Donath-Landsteiner
- Due to Viral infection ... Polyclonal - Viral Infection ... Check For: • Infections ... Polyclonal IgM post infectious ... younger pts) Differential
Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
Knee Effusions - Differential ... - DDX: - Infection ... to the knee Infectious ... Disease Post-Infectious ... Effusions #causes #differential