Basic Microbiology 9 Views 1 Answers
A landfill sample was analyzed by dilution and plating techniques for viable bacterial count. When one gram of the landfill sample was diluted 1 x 10 − 4 −4 (w/v), it yielded 400 CFU. The viable bacterial count (in million, rounded off to the nearest integer) in one gram landfill sample is _______.
A landfill sample was analyzed by dilution and plating techniques for viable bacterial count. When one gram of the landfill sample was diluted 1 x 10−4^{-4} (w/v), it yielded 400 CFU. The viable bacterial count (in million, rounded off to the nearest integer) in one gram landfill sample is _______.
Answer
Answer: 4 million
\textbf{Explanation:} The viable count is calculated by multiplying the colony-forming units (CFUs) by the dilution factor. In this case: 400 \times 10^4 = 4,000,000 \text{ CFU/g} which is equivalent to 4 million CFU/g.
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