Some microbiologists recommend reincubating organisms producing methyl red negative results for an additional 2-3 days. why do you think this i done?

The organism should be re-incubating to permit it to have additional opportunity to create finished results that might be acidic. It may be the case that there isn't sufficient finished result to change the shade of the Methyl Red yet. Some microbiologists prescribe re-brooding life forms delivering methyl red-negative outcomes for an extra 2 to 3 days to build test sensitivity.