When statistically analyzed, the results of comparative, examinations of raw milk samples revealed that bacterial counts by oval tube and microplate methods were essentially equivalent to standard plate counts. The oval tube provides an economical and accurate method for determining the count of producers' milk and may be used in the laboratory or on the platform. The microplate provides an equally accurate but more rapid method than either the oval tube or standard plate since counts be obtained in 20 hours.
Methods are described for packing unfrozen split milk samples which hold their temperature within acceptable limits of 32–40°F for 24–30 hours when stored at ordinary room or higher temperature. The samples may be packed in a wrapped vacuum bottle, surrounded by a refreezant, and placed in cork or Styrofoam shippers or may be packed in nested Styrofoam boxes. Plate counts of split samples, shipped in the nested boxes to participating laboratories for examination, agreed well with each other and with the control laboratory.