Skip directly to site content
Centers for Disease Control and Prevention. CDC twenty four seven. Saving Lives, Protecting People
For a full list of topics:
Public Health Image Library (PHIL)
These three culture plates represented a test, used to isolate
bacteria from cultures containing 7 saprophytic,
spp., which are normal commensal inhabitants of mucosal surfaces, and skin, and rarely cause disease. The middle plate contained a growth medium of glucose-cysteine-blood agar (GCBA), with no added inhibitory chemicals. The culture labeled T-M (PR), was a modified Thayer-Martin (TM) agar, and contained trimethoprim, to inhibit the overgrowth of
(PR) organisms. The culture labeled T-M (VCN), was a modified Thayer-Martin (TM) agar, and contained vancomycin, colistin, and nystatin, in order to kill off most Gram-positive, Gram-negative, and fungal organisms respectively. It is important to note, that the colonial bloom in the middle plate was far greater than either of the other two plates, due to their presence of microorganism inhibitory chemicals.
Click here for hi-resolution image (18.35 MB)
CDC/ John Martin, Jr.
Skip Navigation Links.
Skip Navigation Links.
Chemicals and Drugs
Amino Acids, Peptides, and Proteins
Carbohydrates and Hypoglycemic Agents
Heterocyclic Compounds, 1-Ring
Gram-Negative Aerobic Bacteria
Gram-Negative Aerobic Rods and Cocci
- This image is in the public domain and thus free of any copyright restrictions.
Add to My Pictures
What's New in PHIL
Health Care Providers
Public Relations / Communications
Teachers & Trainers
Photo Librarians & Researchers
Public Health Practitioners
Image ID Search
Get Email Updates
To receive email updates about this page, enter your email address:
Exit Notification / Disclaimer Policy
Links with this icon
indicate that you are leaving the CDC website.
The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.
Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.
CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website.
For more information on CDC's web notification policies, see