agent를 넣어주고 incubator에 35o C 에서 배양시켜 tube의 turbidity 관찰 비교하여 MIC(minimum inhibitoty concentration)즉 bacteria 성장을 억제되는 최저의 antibiotics의 농도를 알아 내는 방법이다.. 우리는 disk diffusion method를 사용하여 antibiotics의 bacteria에 대한 감수성(sensitivity)를 알아 보았다. Muller Hinton Agar에 각각의 영
classification
-More than 30 staphylococcal species are pathogenic.
-A simple strategy for identification of the more clinically important species is outlined in Fig. 135-2.
-Staphylococci is responsible for both nosocomial and community-based infections
-S. aureus is a part of the normal human flora; 25–50% of healthy persons may be persistently or transiently colonized.
-coagul
agent를 넣어서 indole production을 확인한다.
□▪실험5
S. aureus, L. lautis 를 Plate에 배양한다. 다음 날 Hydrogen peroxide를 넣어서 발생하는 작용을 비교한다.
□▪실험6
NaCl이 5%, 10%, 15% 들어 있는 plate와 Glucose가 5%, 10%, 25% 들어있는 plate에 각각E.coli와 S. aureus를 넣고 하루 동안 배양한다. 각각의 삼투압 차
1. Introduction
1) Definition of preservation and food-spoilage micro-organisms
Food preservation is the process of treating and handling food to stop or greatly slow down spoilage (loss of quality, edibility or nutritive value) caused or accelerated by micro-organisms. Some methods, however, use benign bacteria, yeasts or fungi to add specific qualities and to preserve food (e.g., cheese, wine
Definition
: compounds that have some antimicrobial activity
from nature source
① plant origin
green chemicals
Spices and herbs are well known to inhibit
bacteria, yeasts, and molds.
② Microbial origin
Biopreservatives
main stream field of study is the use of
lactic acid bacteria(LAB).
Definition
host-synthesized, l