Experiment on the bacterium Escherichia coli

High school
Pages 19 (4769 words)
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I would like to per'onally thank all of the people involved with the Univer'ity of Hudder'field, who helped with my final year di''ertation, which include' all laboratory 'taff and off cour'e, my lecturer and tutor, Dr Mike Leonard.
Aim: To attempt to find the conditions in which the bacterium Escherichia coli (E.coli) growth occurs at an optimum level, when exposing different E.coli strains to different conditions, such as growth media and temperature.


Escherichia coli (E.coli) are gram negative, non-spore forming strains of bacterium that usually inhabit the intestinal tracts of humans and other warm-blooded animals. They are facultative anaerobes that ferment simple sugars like glucose into lactic, acetic and formic acids (HITM, 2006). Most E coli strains are harmless and even are beneficial in the sense that they assist the host by destroying other harmful strains of bacterium and by synthesising sizeable amounts of vitamins (HITM, 2006). Nevertheless, there are certain strains of E coli that prove harmful to humans and other hosts. These are categorised into four major groups - enteropathogenic E coli, enetroinvasive E coli and enterohemorrhagic E coli (HITM, 2006). These four harmful categories earn the E coli strain significant ill-repute as one of the most significant foodborne pathogens. In recent years great attention is being placed on successfully combating their pathogenic influence on humans. ...
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