PreQuiz (See related pages) 1 High numbers of coliforms indicate recent fecal contamination. A) True B) False 2 In terms of water testing, what are indicator bacteria? A) Species of bacteria that are human pathogens. B) Species of bacteria that are part of the normal intestinal flora of birds and mammals. 3 The indicator bacteria that are tested for in water quality testing are normally part of _____________. A) the oral microbiota B) the lung microbiota C) the intestinal microbiota 4 For measuring water quality, which of the following LTB tubes should be subcultured? A) Tubes that exhibit gas production B) Tubes that do not exhibit gas production 5 The presence of a bubble in the Durham tube indicates what kind of reaction? A) positive B) negative
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