ated, he proposed that the life cycle of D. folliculorum mites was about 14.5 days. He also demonstrated that all life stages of these mites were negatively phototaxic, that is they were more mobile in a dark environment and relatively inert when bright light was shone on them. However, until optimal in vitro culture techniques and conditions allow Demodex proliferation in the laboratory, the t...

The gut microbiota play critical roles in intestinal function, but the mechanisms involved remain obscure. Recent studies suggest that commensal bacteria promote immune homeostasis via the innate immune receptor Nod1.

ated, he proposed that the life cycle of D. folliculorum mites was about 14.5 days. He also demonstrated that all life stages of these mites were negatively phototaxic, that is they were more mobile in a dark environment and relatively inert when bright light was shone on them. However, until optimal in vitro culture techniques and conditions allow Demodex proliferation in the laboratory, the t...

Escherichia coli (E. coli) is a normal inhabitant of the gastrointestinal tract of vertebrates, including humans. Phylogenetic analysis has shown that E. coli is composed of four main phylogenetic groups (A, B1, B2 and D). Group A and B1 are generally associated with commensals, whereas group B2 is associated with extra-intestinal pathotypes. Most enteropathogenic isolates, however, are assigne...

Introduction: The ability of pathogenic microorganisms of obtaining iron from host is essential for its survival. Microorganisms require iron for a variety of metabolic processes, so they synthesize and secrete small organic molecules called siderophores that actively chelate iron. The study was carried out to compare the results of siderophore produced by commensals & clinical isolates and co-...

The human vaginal microbiome plays a critical but poorly defined role in reproductive health. Vaginal microbiome alterations are associated with increased susceptibility to sexually-transmitted infections (STI) possibly due to related changes in innate defense responses from epithelial cells. Study of the impact of commensal bacteria on the vaginal mucosal surface has been hindered by current v...

BACKGROUND Interferences between pathogenic bacteria and specific commensals are known. We determined the interactions between nasopharyngeal microbial pathogens and commensals during viral upper respiratory tract infection (URI) and acute otitis media (AOM) in infants. METHODS We analyzed 971 specimens collected monthly and during URI and AOM episodes from 139 infants. The 16S rRNA V4 gene r...