ESBL stands for extended-spectrum beta-lactamases, i.e., a group of enzymes produced by Gram-negative and Gram-positive bacteria that can hydrolyze all β- lactam agents except carbapenems and...
Category: Bacteriology
Borrelia burgdorferi (Lyme disease): Clinical Features, Diagnosis
Lyme disease (named after a town in Connecticut) or Lyme borreliosis is a vector-borne zoonotic disease caused by three genomospecies of Borrelia, collectively referred to as Borrrelia burgdorferi...
Enterococcus faecalis: Properties, Pathogenesis, Lab Diagnosis
Enterococci are catalase negative, gram-positive cocci in chains. Initially grouped under group D Streptococcus, they are reclassified later as a separate genus Enterococcus under a family...
The genus Serratia currently contains >15 recognized species, seven of which have been isolated from human clinical specimens. S. marcescens is the most important member of the genus. Recognized...
The enzyme carbapenemase can be detected by various phenotypic and molecular methods. Phenotypic methods for carbapenemases detection are preferred over molecular techniques because they are rapid,...
Demonstration of Treponema pallidum Using Dark-Field Microscopy
Treponema pallidum is a thin, delicate, tightly wound spirochaete that cannot be seen in Gram-stained smears. So, dark-field microscopy is used to demonstrate the presence of motile Treponema...