Brucella species: Likely Clinical Specimens and Gram Stain Morphology

How to Subscribe
MLS & MLT Comprehensive CE Package
Includes 185 CE courses, most popular		$109Add to cart
Pick Your Courses
Up to 8 CE hours		$55Add to cart
Individual course$25Add to cart
The page below is a sample from the LabCE course Preliminary Identification of the Primary Select Agents of Bioterrorism. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Preliminary Identification of the Primary Select Agents of Bioterrorism (online CE course)
Brucella species: Likely Clinical Specimens and Gram Stain Morphology

Clinical specimens where organisms may be encountered:
  • Blood
  • Bone marrow
  • Tissue
Gram stain morphology:
  • Very small, gram-negative coccobacilli
  • Stains very faintly and tends to retain crystal violet, especially in blood cultures
  • May initially be identified as gram-positive
  • Organism is larger than F. tularensis
  • Individual cells are evident
12. Clark, W. (1977). Image #1937. Caption: "This photomicrograph of a Gram-stained culture sample, revealed the presence of numerous Gram-negative, Brucella melitensis coccobacilli." .http://.phil.cdc.gov/Details.aspx?pid=1937

Gram stain of Brucella melitensis coccobacilli. (12)