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Okay so I have a question from a lab I did, so I'll quickly outline our...

Okay so I have a question from a lab I did, so I'll quickly outline our lab.

We mixed E coli. and Salmonella with antiserum and observed for cloudiness/agglutination. We then mixed the same antiserum with an unknown bacteria to determine whether it was E coli. or Salmonella. We are asked "how definitive are the results?" and I'm not really sure. Are they less definitive because we observed the agglutination using only our eyes?

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When you would have mixed either of the two bacterial population with anti serum you would have observed a clear cut result either there would be cloudiness or there wont be. Similarly when you would have mixed the unknown population of bacteria to see if the bacteria was e.coli or salmonella and were asked how definitive results were it meant how surely can you tell if it was the same as e.coli or salmonella. If the cloudiness or appearance was not like either then the unknown population is mixed or contains a different bacteria altogether.

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