spacer
  Home | About CDC | Press Room | Funding | A-Z Index | Centers, Institute & Offices | Training & Employment | Contact Us
spacer
spacer CDC Centers for Disease Control and Prevention Home Page spacer
CDC en Español
spacer
Search:  
spacer
Health & Safety Topics Publications & Products Data & Statistics Conferences & Events
spacer
spacer
spacer
Public Health Image Library (PHIL)   Photographs, Illustrations, Multimedia Files
spacer
Skip Nav spacer
PHIL Home

11758

PHIL Image 11758

ID#:11758
Description:This image depicts the colonial morphology exhibited by colonies of Brucella abortus bacterial, which had been cultivated on sheep’s blood agar (SBA), for a period of 72 hours.

Infectious Agent

Brucella species are facultative, intracellular, gram-negative coccobacilli. Nine species of Brucella are currently defined by phenotypic and antigenic differences, in addition to differential host specificity.

- Known human pathogens: B. abortus, B. melitensis, B. suis, and B. canis.

- Pathogenicity to humans of these species is not well known: B. ovis, B. neotomae, B. ceti, B. pinnipedialis, and B. microti.

Mode of Transmission

- Eating or drinking contaminated milk products is the most common route of infection for Brucella spp.

- Brucella can enter the body via skin wounds, mucous membranes, or inhalation.

- Person-to-person transmission is very rare.

Clinical Presentation

- Incubation period is 2–4 weeks (range 5 days to 5 months).

- Initial presentation is nonspecific, such as fever, muscle aches, fatigue, headache, and night sweats.

- Fever may be continuous or intermittent (undulant) .

- Systemic infection may localize in liver, spleen, bone marrow, joints, heart, or reproductive organs.

- Endocarditis is a primary cause of mortality.

- Neuropsychiatric symptoms, such as depression or sleep disturbance, are rare.

- More severe symptoms are generally associated with B. melitensis or B. suis infections than with infections from other Brucella spp.

High Resolution:Right click here and select "Save Target As..." for hi-resolution image (21.84 MB)
Content Providers(s):CDC/ Megan Mathias and J. Todd Parker
Creation Date:2009
Photo Credit:
Links:
  • CDC - National Center for Immunization and Respiratory Diseases: Division of Bacterial Diseases; Disease Listings: Brucellosis
    Categories:
    CDC Organization

    MeSH
    tree picture Diseases
    tree picture tree picture Bacterial Infections and Mycoses
    tree picturetree picture tree picture Bacterial Infections
    tree picturetree picturetree picture tree picture Gram-Negative Bacterial Infections
    tree picturetree picturetree picturetree picture tree picture Brucellosis
    tree picture Organisms
    tree picture tree picture Bacteria
    tree picturetree picture tree picture Gram-Negative Bacteria
    tree picturetree picturetree picture tree picture Gram-Negative Aerobic Bacteria
    tree picturetree picturetree picturetree picture tree picture Gram-Negative Aerobic Rods and Cocci
    tree picturetree picturetree picturetree picturetree picture tree picture Brucellaceae
    tree picturetree picturetree picturetree picturetree picturetree picture tree picture Brucella
    tree picturetree picturetree picturetree picturetree picturetree picturetree picture tree picture Brucella abortus
    tree picturetree picture tree picture Proteobacteria
    tree picturetree picturetree picture tree picture Alphaproteobacteria
    tree picturetree picturetree picturetree picture tree picture Brucellaceae
    tree picturetree picturetree picturetree picturetree picture tree picture Brucella
    tree picturetree picturetree picturetree picturetree picturetree picture tree picture Brucella abortus
    Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.
     Add to My Pictures

    PHIL Home


    This page last reviewed: Mar. 18 2005
    spacer
    spacer
    spacer
    spacer
      Home | Policies and Regulations | Disclaimer | e-Government | FOIA | Contact Us
    spacer
    spacer
    spacer Safer, Healthier People
    spacer
    Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, U.S.A
    Tel: (404) 639-3311 / Public Inquiries: (404) 639-3534 / (800) 311-3435
    spacer USA.gov: The U.S. Government's Official Web PortalDHHS Department of Health
    and Human Services