Author/Authors :
hazzah, w.a. microbiology department,high institute of public health,alexandria university, Egypt , hashish, m.h. microbiology department,high institute of public health,alexandria university, Egypt , el-koraie, a.f. microbiology department,high institute of public health,alexandria university, Egypt , ashour, m.s. microbiology department,high institute of public health,alexandria university, Egypt , abbass, a.a. microbiology department,high institute of public health,alexandria university, Egypt
