A plate loop count method for determining viable counts of raw milk has been described. The technique uses a 0.001 ml calibrated loop attached to a continuous volume syringe for rinsing the sample into a standard petridish prior to pouring with agar. Results with this method compare closely with the standard plate count performed simultaneously on the same sample.
1Work on this project was initiated while the senior author was on active duty as an army reserve officer at the Robert A. Taft Sanitary Engineering Center. The experiments were completed at the Wisconsin State Laboratory of Hygiene, Madison.