본 실험은 원유내외 세균을 빠르고, 일관성있고, 신뢰성이 있는 평가 system을 얻기 위함이며, 원유 내외 총균수와 저온성균수, 대장균군수를 malthus의 detection time과 regression equation과 상관관계를 조사하였다. Conductance method는 종래의 plate count method보다빠르고 자동적이며, 노동력을 최대한 절감할 수 있다. 그 결과는 다음과 같다. 1. Conductance detection time을 (Y), total bacterial log count를 (X)라고 할 때 regression equation Y=18.27651-2.07550X, 상관계수는 -0.95(n=201)로 나타났다. 2. Conductance detection time을 (Y), total bacterial log counts를 (X)라고 할때 regression equation Y=9.32048-1.15598X, 상관계수는 -0.90(n=207)로 나타났다. 3. Conductance dotection time을 (Y), psychrotrophic bacterial log counts를 (X)라 할때 regression equation Y=29.96008-3,02487X 상관계수는 -0.90(n=201)로나타났다.
This study was performed to obtain fast, consistant and reliable estimation system of bacterial counts of raw milk, which effectively related to the quality of sanitaion and the condition of production at the farm. This study compared regression equation and correlation coefficient relationship between standard plate counts and data of Malthus conductance method for the detection time of total, psychrotrophs, coliform bacterial counts in raw milk. Regression equation (RE) between conductance detection time (Y) and total bacterial log counts (X) was Y=18.27651 - 2.07550X, with correlation coefficient -0.95(n=201). In coliform, RE was Y=9.320848 - 1.15598X with correlation coefficient -0.90 (n=207). Psychrotrophs had the RE of Y=29.96008-3.02487 with correlation coeffecient -0.9 (n=201). This conductance method gave results more quickly and was less labor-intensive than traditional standard plate count method.
