Erwinia spp

Gram Stain

• Gram negative bacilli - fermenter

Clinical Significance

These organisms colonize plants and are considered environmental organisms. 

One case of urinary tract infection has been attributed to Erwinia spp. 

Usual Susceptibility Pattern

These organisms produce a chromosomal extended spectrum beta-lactamase (ESBL) and are usually resistant to ampicillin and 1st/2nd generation cephalosporins. 

Third generation cephalosporins may have reduced activity.

They have variable resistance to aminoglycosides.