Work out an MPN
Three tubes at each of three dilutions. Select the tubes that showed growth. A filled tube has grown.
0.1 g
0.01 g
0.001 g
Positive tubes: 3, 1, 0
43 MPN/g
95 percent confidence: 9 to 180 per gram.
Notice how wide the range is. An is an estimate, so a result near a needs care.
Source: (August 2023), Table 1.