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)
The field epidemiologist depicted here, was in the process of baiting one of a number of animal traps with peanut butter. In this case, this trap, along with five additional traps to his right, were Sherman traps, able to capture unwary animals without injuring the specimens. Each trap was labeled with a unique number, which would be recorded in the scientist’s log book. The trap number would indicate its location, which would facilitate its retrieval later on. An epidemiologist would extract a blood sample from a trapped specimen, and depending upon the type of study being conducted, would run the appropriate tests on the sample in order to determine if the specimen had been infected with the pathogen under investigation.
Click here for hi-resolution image (18.35 MB)
CDC/ H.E. Stark
Skip Navigation Links.
Organization – 2004 – present
Coordinating Center for Health Information and Service
National Center for Health Statistics
Office of Analysis and Epidemiology
Coordinating Center for Infectious Diseases
National Immunization Program
Epidemiology and Surveillance Division
Skip Navigation Links.
Analytical, Diagnostic and Therapeutic Techniques and Equipment
Environment and Public Health
- 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