Coagulase-negative staphylococci (CNS) have gained substantial interest as pathogens involved in nosocomial, particularly catheter-related infections. The pathogenic potential of CNS is mainly due to their capacity to form biofilms on indwelling medical devices. In a biofilm, the bacteria are protected against antibiotics and from attacks by the immune system. The factors contributing to biofil...

A specific serum factor was required for rapid phagocytosis of pathogenic staphylococci by human polymorphonuclear leukocytes when the ingestion process was studied in siliconed glass systems and the concentrations of staphylococci were maintained at low levels. In contrast to certain other microbes, the resistance to phagocytosis which characterized pathogenic staphylococci was relative, and p...

Background: Neutropenic patients are vulnerable to a wide spectrum of infectious agents. The aim of this study was to determine the current frequency of bacterial infections in patients with nosocomial fever and neutropenia. Methods: In a retrospective study, the neutropenic patients’ specimens with nosocomial fever were cultured on blood and MacConkey agar plates and evaluated at microbiology ...

Staphylococci isolated from 98 mastitic cow’s milk samples were analyzed for the production of alpha,beta and delta-hemolysin on sheep, bovine and horse red blood cells and in vitro susceptibility to several antimicrobial agents. Out of a total of 18 isolated strains, 100% demonstrated hemolytic activity either alone or in combined forms. Among 8 isolates of S. aureus 3 isolates produced α/β an...