Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to page options Skip directly to site content


Description:This historic 1965 photograph depicted a laboratory technician, as he was employing a microtechnique during an analysis, which would test for the suspected presence of anti-streptolysin O (ASO or ASLO), in a patient’s serum samples. ASO is an antibody produced by a person infected with Lancefield group A streptococci bacteria, in response to the bacterias’ production of an enzymne, i.e., antigen, streptolysin O. This enzyme is one of two produced by this pathogen, which is involved in the hemolytic reaction seen in specific streptococcal infections. Hemolysis is the physical breakdown of red blood cells (RBCs).
Modern day protocols now call for the laboratorian executing such tasks, to wear additional personal protective equipment (PPE) including safety goggles, and a face mask. PPE, as defined by the Occupational Safety and Health Administration, or OSHA, is “specialized clothing or equipment, worn by an employee for protection against infectious materials.”
High Resolution: Click here for hi-resolution image (14.14 MB)
Content Providers(s):CDC/ Cecil Duncan
Creation Date:1965
Photo Credit:
CDC Organization
Skip Navigation Links.

Skip Navigation Links.
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.