conclusions with regards to the continuous changing in causative microorganisms isolated from patients with uti and antibiotic sensitivity patterns, it is recommended that bacterial sensitivity patterns in populations are determined in any region annually. . objectives this study aimed to detect and also compare the frequency and drug resistance pattern of gram negative bacteria isolated from p...

shigella sonnei is considered as a major cause of diarrheal disease in both developing and developed countries. iran is one of the endemic areas of shigellosis. the present study was undertaken to investigate the antibiotic susceptibility and genetic relatedness of s. sonnei strains isolated from pediatric patients in tehran, iran.the study included all s. sonnei strains isolated from pediatric...

Volume alteration in solid materials is a common cause of material failure. Here we investigate the crack formation in thin elastic layers attached to a substrate. We show that small variations in the volume contraction and substrate restraint can produce widely different crack patterns ranging from spirals to complex hierarchical networks. The networks are formed when there is no prevailing gr...