Fever and Polyarthritis

Review article here from NEJM

Consider the following most common etiologies:

1. Infectious:
   
   • Bacterial Infection of Joints
     
     • Staphylococcus aureus
     • Group G Streptococcus
     • Neisseria gonorrrhoeoe and meningiditis
   • Bacterial Endocarditis
   • Lyme disease
   • Secondary Syphilis (usually with rash)
     
   • Mycobacteria/Fungal
   • Viral
     
     • Parvovirus B19
       
     • Rubella
     • HIV seroconversion
     • Hepatitis B and C
2. Post-Infectious
   
   • Reactive arthritis post Chlamydia or enteric infection
   • Rheumatic Fever or Post-Streptococcal Arthritis
3. Rheumatologic
   
   • Rheumatoid Arthritis
   • Lupus
   • Systemic Vasculitis (i.e. PAN)
   • Still's Disease
   • Crystal Induced Arthritis
4. Other (i.e. IBD associated arthritis)
   

We also talked today about the approach to septic arthritis.