Infectious Diseases

1. Most common cause of septic arthritis in a person less than 40 years old = Gonococcus

2. Most common cause of osteomyelitis in general population = S. aureus

3. Most common cause of osteomyelitis in Sickle Cell patients = Salmonella

4. Most common cause of osteomyelitis due to nail-puncture wounds = Pseudomonas (V.Imp!)

5. Most common parasitic infection of the brain = Neurocysticercosis

6. Most common cause of Encephalitis in USA = Herpes Simplex Virus (HSV)

7. Most common cause of dysentry in the USA = C. jejuni (undercooked poultry)

8. Second most cause of dysentry in the USA = Shigella (daycare centers)

9. Most common cause of pneumonia in nursing home residents = S. pneumoniae
10. Most common cause of malignant otitis externa = P. aeruginosa

11. Most common risk for contracting HIV in USA= Intravenous Drug Use

12. Most common presenting Manifestation of AIDs = P. carinii pneumonia

13. Most common cause of Menigitis in adolescents = N. Gonorhhaea

14. Most common cause of Meningitis in the USA = Streptococcus pneumoniae

15. Most common Neurological Manifestation of Lyme Disease = Facial Nerve palsy!

16. Most common Cardiac manifestation of Lyme Disease = AV Heart Block

17. Most Common viral STD in the USA = HPV !

18. Most Common Complication of Mumps in Pre-pubertal Children = Encephalitis

19. Most Common Complication of Mumps in Pubertal and Post-Pubertal Adults (and Males) = Orchitis