Biology/E. coli in a nutrient agar
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Question
Hello I m nessa I just want to know why E. coli has the color of yellow in a nutrient agar?
Hi Nessa: Thanks for your question. If E coli is grown on media that contains lactose, it will have a yellow color. What sugar(s) are in your nutrient agar, and how old are the colonies?
Hope this helps, please write back if you have more questions.
FM Rollwagen, phD
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Answers by Expert:
Florence M Rollwagen
Expertise
I can answer questions in biology, microbiology and immunology on the undergraduate or graduate level. I can also address medical and health concerns regarding alternative medicine, autoimmune diseases (lupus, MS) liver disease and intestinal problems.
Experience
I have over 20 years experience in research and teaching at the medical/graduate level, and 5 years teaching college biology and microbiology. My expertise is in microbiology and immunology, specifically the biology of cytokines and soluble immune response modifiers. I also carried out original research in blood substitutes and shock/trauma.
Organizations
American Association of Immunologists (AAI)
American Association for the Advancement of Science (AAAS)
Publications
Journal of Experimental Medicine, Journal of Immunology, Cytokine, Shock, Experimental Hematology
Education/Credentials
BS biology 1966
MS biology 1968
PhD immunology 1979
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