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An exotoxin is a poison secreted by bacteria.[1] An exotoxin can hurt a living creature by destroying cells or changing the way that cells work. They are very strong and can cause major damage.


  1. Ray, editors, Kenneth J. Ryan, C. George (2010). Sherris medical microbiology (5th ed. ed.). New York: McGraw Hill Medical. ISBN 978-0-07-160402-4 .