Streptococcus pneumoniae strains are sensitive to the chemical optochin (ethylhydrocupreine hydrochloride). Optochin sensitivity allows for the presumptive identification of alpha-hemolytic...
Tag: Gram Positive Cocci
The bile (sodium deoxycholate) solubility test distinguishes Streptococcus pneumoniae from all other alpha-hemolytic streptococci. Streptococcus pneumoniae is bile soluble, whereas all other...
Bacitracin is a bactericidal drug that is useful in treating superficial skin infections but is too toxic for systemic use. Bacitracin is a polypeptide antibiotic produced by Bacillus subtilis....
Streptococcus pneumoniae: Properties, Pathogenesis, and Diagnosis
Streptococcus pneumoniae (pneumococci) is a part of the normal nasopharyngeal and oropharyngeal flora. It is an important etiological agent of upper and lower respiratory tract infections (URTI...
In this blog post, I am sharing information about the standard, conventional biochemical tests and their primary uses in the Microbiology laboratory for identifying pathogens of interest. Some of the...
The shape of a bacterium is determined by its rigid cell wall. Bacteria that lack a cell wall (Mycoplasma and L-forms) display a great diversity of unusual shapes. Bacteria having various shapes are...
