Normal GI flora.

Most predominant gram negative bacillus.

An exhaustive list.

Most common cause of UTI.

Also common:

• Intra-abdominal infection/abscess
• Nosocomial pneumonia
• Bacteremia
• Prosthetic device infection
• Gastroenteritis, ranging from travelers diarrhea to invasive infection with hemolytic-uremic syndrome
• Myriad other manifestations
• Note endocarditis is rare