Colony populations for each bacterial group were expressed as
log colony forming units (cfu) or log number/ml medium. Logarithmically transformed data were analysed by one way analysis of
variance using SAS (version 9.1) with the level of significance set
at P < 0.05. populations for each bacterial group were expressed as
log colony forming units (cfu) or log number/ml medium. Logarithmically-
transformed data were analysed by one way analysis of
variance using SAS (version 9.1) with the level of significance set
at P < 0.05.