Abstract:
The aim of this study is to determine the effect of the heavy metals on bacteria of
Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative). In this
study cadmium, copper, zinc and lead were used as heavy metals to study minimal
inhibitory concentration (MIC) produced for each bacteria strain. The introduction of
heavy metals, in various forms, in the environment, can produce considerable
modifications of the microbial communities and their activities. In order to determine
their activities, heavy metals were used to study the effect on bacteria growth. The
minimal inhibitory concentration (MIC) produced by heavy metal for each bacteria
strain was determined. In this study two method were used which is Optical Density
Test and Disk Diffusion Test.
