Reliability assessment permits to evaluate the amount of error inherent to a measurement,
which will consequently determine the validity of the results.
Although the analysis of intra- and inter-examiner reproducibility can provide information about reliability of results,
this step has been neglected in several studies of applied microbiology.
To our knowledge, no study has compared the consistency of Pzsap readings according to the measurement protocol.
Some authors also have used colonies in triplicate to analyze the production of SAPs in their samples