Definition of SRID - Single Radial Immunodiffusion

Radial Immunodiffusion is a technique used extensively for the quantitative estimation of antigens.

Antibody of known specificity is distributed evenly in an agar gel and a sample containing the antigen of interest is placed in a well within the gel. Antigen then diffuses radially from the well and a precipitin ring forms at the point of antibody-antigen equilibrium. Antigen concentrations are determined by measuring the diameter of precipitin rings and extrapolating using standard curves.

Ames

Antibiotic Resistance

Antibiotics

Antimicrobial Agent

Antimicrobial Drug Resistance

Antimicrobial Susceptibility Testing (AST)

Bacillus

Bacteria

Bioburden

CFU

Chromogenic media

CLSI

Coccus

Conjugation

Endospore

Enteric Bacteria

EUCAST

Flagellum

Fungi

Gram Stain

Membrane filtration

MIC

Microbiology

Microorganism

Morphology

OPKA

Pathogen

Penicillins

Plasmid

SBA

Spirillum

Spirochaete

SRID – Single Radial Immunodiffusion

Sterility test

Vaccine

Vibrio

Virus