Chemiluminescence of enterococci isolates from freshwater.

All Enterococcus spp., isolated from environmental water samples (n=81), emitted a high chemiluminescence signal in the presence of luminol (10(-2) M). Kinetic studies of chemiluminescence show a close correlation between chemiluminescence and growth curves during the exponential phase, with a maximum chemiluminescence reached just before bacterial growth entered in the stationary phase.

Effects of iron and oxygen species scavengers on Listeria spp. chemiluminescence.

Listeria monocytogenes and Listeria innocua are able, under certain conditions, to produce chemiluminescence (CL), which is amplified by luminol. Kinetic studies of CL by L. monocytogenes and L.

Low-level iron-dependent mutants of Listeria monocytogenes and their virulence in macrophages.

Listeria monocytogenes is an opportunistic intracellular pathogen capable of growth that requires iron for growth within phagocytic cells and virulence expression. In the presence of an appropriate concentration tropolone, an iron-chelating agent, growth of L. monocytogenes is completely inhibited.

A simple chemiluminescence-based method for rapid enumeration of Listeria spp. microcolonies.

Aims: Listeria monocytogenes is capable, under certain conditions, of producing chemiluminescence which is amplified by luminol. This property was used to detect and count microcolonies of Listeria spp. in a few hours, without the use of a microscope.

Effect of siderophores, catecholamines, and catechol compounds on Listeria spp. Growth in iron-complexed medium.

Almost all bacteria require iron for growth and virulence expression. However, Listeria spp. do not produce any siderophore for iron acquisition.