Quotation from: Manual of SurgeryWritten by: Alexander Miles and Alexis Thomson |
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#Conditions of Bacterial Life.#--Bacteria require for their growth and development a suitable food-supply in the form of proteins, carbohydrates, and salts of calcium and potassium which they break up into simpler elements. An alkaline medium favours bacterial growth; and moisture is a necessary condition; spores, however, can survive the want of water for much longer periods than fully developed bacteria. The necessity for oxygen varies in different species. Those that require oxygen are known as _aerobic bacilli_ or _aerobes_; those that cannot live in the presence of oxygen are spoken of as _anaerobes_. The great majority of bacteria, however, while they prefer to have oxygen, are able to live without it, and are called _facultative anaerobes_.
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