Objective:Selecting four different functional communities,to analyze and monitor the microorganism distribution in each domain external environment(including foods,air,water and soil) and the drug resistance of pathogenic bacterium associated infectious diseases.Methods:According to "the correlative laboratory operating manual of countrywide foods pollutant monitoring"(the part of bacteriology),"the docimastic methods of airborne microorganism in public places","the hygienical standards of centralized airconditioning ventilating syst...