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Description:These two 1929 photographs depicted a comparison between a healthy bovine udder on the left, and a tuberculous cow’s udder on the right. The photograph was used as an aid to livestock owners and health inspectors, in order to help them to recognize the condition of ”bovine tuberculosis”, which could contribute to the bacterial contamination of raw, unpasteurized milk.
This was one of a series of instructional images used by the Minnesota Board of Health used to train the state’s public health workers. The purpose of these images and the training was focused on protecting food supplies from bacterial contamination.

Many people do not think about food safety until a food-related illness affects them or a family member. While the food supply in the United States in 2005 was deemed to be one of the safest in the world, CDC estimates that 76 million people get sick, more than 300,000 are hospitalized, and 5,000 Americans die each year from food-borne illness. Preventing food-borne illness and death remains a major public health challenge.

High Resolution: Click here for hi-resolution image (32.65 MB)
Content Providers(s):CDC/ Minnesota Department of Health, R.N. Barr Library; Librarians Melissa Rethlefsen and Marie Jones
Creation Date:1929
Photo Credit:
Links:Minnesota Health Department
Minnesota Health Department; R.N. Barr Library
CDC – Nat. Center for Infectious Diseases; Div. of Bacterial and Mycotic Diseases; Food Safety Office
CDC Organization
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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.