Three Patients from the Burn Unit Have Positive Blood Cultures

Three patients from the burn unit have positive blood cultures that grow an oxidase-positive, non-lactose fermenting, gram-negative rod that is TSI - K/NC and lysine positive. This presence of this organism in all three patients suggests

A) an outbreak of nosocomial infection.
B) the presence of infected intravenous catheters.
C) burn wound infection.
D) an outbreak of pseudobacteremia.