the objective of this study was to determine the occurrence of antimicrobial resistance among staphylococcus aureus and to estimate the presence of methicillin-resistance in s. aureus (mrsa) isolates obtained by culture and polymerase chain reaction (pcr) methods. for this purposes, 100 iranian white and feta cheese samples collected from different suppliers were initially evaluated for the occ...

The distribution characteristics of vancomycin-resistant enterococci (VRE) and the resistance of enterococcus isolates to various antibiotics were investigated in Yae River, which flows through Miyazaki city, Japan. The prevalence of VRE among specimens collected from the urban river basin using mEI agar was 0.9% (2 of 226 enterococcal isolates). In the 333 enterococcal isolates obtained using ...

conclusions the result of the current study showed the growing number of nosocomial infections associated with xdr a. baumannii causing difficulties in antibiotic therapy. resistant strains increasingly cause public health problems; therefore, their early detection is essential for healthcare centers. results among the 121 isolated a. baumannii, 44% and 56% were isolated from female and male, r...

In all of ten strains of H. influenzae examined prior to exposure to streptomycin a very small fraction of the bacteria formed colonies in the presence of 1,000 units of streptomycin per cc. These variant organisms possess the characteristics of bacterial mutants. 1. Different independent cultures of the same strain on different occasions, and even cultures seeded in a single test with the same...

Objective The extensive pollution of natural ecosystems has occurred by organophosphorus pesticides, being used for improvement of crop production in agriculture. Biodegradation is interested in application of multifunctional bacteria containing genetical elements which specially degrade organophosphorus compounds. In this paper the detection of two bacteria species, Pseudomonas and Flavobacte...

BACKGROUND Antimicrobial usage is considered the most important factor promoting the emergence, selection and dissemination of antimicrobial-resistant microorganisms in both veterinary and human medicine. The aim of this study was to investigate the prevalence and genetic basis of tetracycline resistance in faecal Escherichia coli isolates from healthy broiler chickens and compare these data wi...

To understand better the endogenous sources of MHC class I peptide ligands, we generated an antigenic reporter protein whose degradation is rapidly and reversibly controlled with Shield-1, a cell-permeant drug. Using this system, we demonstrate that defective ribosomal products (DRiPs) represent a major and highly efficient source of peptides and are completely resistant to our attempts to stab...

Five hundred and seventy strains of Gram-positive, catalase-positive, coagulasenegative cocci from various sources were classified on the basis of their ability to grow anaerobically and to ferment mannitol. Five groups were distinguished. The frequency of strains classified in the five groups varied with the source. Only 26% of the strains were sensitive to all the nine antibiotics used in the...

introduction : streptococcus pneumoniae cause morbidity and mortality in infants and younger children. because of high prevalence of penicillin resistance, rapid and reliable diagnostic techniques for penicillin non-susceptible s. pneumoniae (pnssp) are important for prevention and treatment. we investigated the association of the restriction length polymorphism (rflp) patterns for pbp2b to dis...