Sagar Aryal 
Streptococcus pneumoniae can be differentiated from Viridans streptococci by various features: S.N. Properties Pneumococcus Viridans streptococci 1 Morphology Lanceolate or flame-shaped Round/oval 2 Arrangement Gram-positive cocci in pairs Gram-positive cocci … Read more
Selenite Broth was devised by Leifson, who demonstrated that selenite was inhibitory for coliforms and certain other microbial species, such as fecal streptococci, present in fecal specimens and, thus, was … Read more
Most bacteria have the ability to ferment carbohydrates, particularly sugars. Among them, each bacterium can ferment only some of the sugars, while it cannot ferment the others. Thus, the sugars, … Read more
DNA replication and transcription are fundamental genetic processes that are essential for cell growth and division. Both DNA replication and transcription processes involve the generation of a new molecule of … Read more
In 1984, Bolton et al. stated charcoal might efficiently substitute blood in a culture medium for isolating Campylobacter spp. Endtz et al. later confirmed there is a higher isolation rate … Read more
Thayer and Martin reported an improvement of the Chocolate Agar formulation that contained antimicrobics vancomycin, colistin and nystatin have been added to minimize overgrowth by contaminants, suppress the growth of … Read more
MHC Class I and Class II differences (mhc i vs mhc ii) The major differences are: S.N. Characteristics MHC-I molecule MHC -II molecule 1. Distribution Present on almost all nucleated … Read more
Mannitol Salt Agar (MSA) is used as a selective and differential medium for the isolation and identification of Staphylococcus aureus from clinical and non-clinical specimens. It is recommended for the detection and … Read more
Amies Transport Medium is an improved transport medium, containing charcoal to prolong the viability of pathogenic organisms. It is a semisolid media recommended for use in qualitative procedures for the … Read more
Simmons citrate agar is a selective and differential medium that tests for an organism’s ability to use citrate as a sole carbon source and ammonium ions as the sole nitrogen … Read more
