Brucella species — Colony Characteristics
Brucella is the most commonly reported agent of laboratory-associated infection. It is a virulent, highly infectious organism. Once this organism is suspected on the basis of clinical and/or laboratory information, do not perform additional testing. Send the isolate to the South Dakota State Laboratory for identification.
|Sheep blood agar growth at 24 hours is very light.|
|Colonies at 48 to 72 hours are punctate and nonhemolytic.|
|MacConkey – some strains may grow slowly on this media.|