selective medium

Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.
Related to selective medium: differential medium

se·lec·tive me·di·um

a culture medium containing ingredients that inhibit growth of contaminants or microorganisms other than that desired.

selective medium

any medium that restricts the growth of certain microorganisms, but not of others.


pl. media, mediums [L.]
1. an agent by which something is accomplished or an impulse is transmitted.
2. a substance providing the proper nutritional environment for the growth of microorganisms; called also culture medium.

basic nutritive medium
one adequate for the growth requirements of most bacteria.
contrast medium
a radiopaque (positive) substance, or (negative) gases used in radiography to permit visualization of body structures.
culture medium
a substance used to support the growth of microorganisms or other cells.
dioptric medium
refracting medium (see below).
disperse medium, dispersion medium
the continuous phase of a colloid system; the medium in which a colloid is dispersed, corresponding to the solvent in a true solution.
enriched medium
modification of a basic medium for the growth of fastidious bacteria. Common additions are blood, serum or egg yolk.
indicator medium
a type of bacteriological medium which may contain a fermentable sugar plus a pH indicator that gives a color change. It is used to identify bacteria on the basis of a characteristic biochemical reaction.
refracting medium
the transparent tissues and fluid in the eye through which light rays pass and by which they are refracted and brought to a focus on the retina.
medium sausage
a technique for examining meat for bacterial contamination. The solid medium is made up in the form of a sausage and slices are removed from it after application of the exposed end to the suspect meat.
selective medium
formulated to facilitate the isolation of specific bacteria, they contain substances to inhibit growth of others.
transport medium
formulated to preserve a specimen, usually tissue or microbiological swab, and minimize bacterial overgrowth for the time necessary to transport it to the laboratory.
References in periodicals archive ?
Isolates expressing promising growths in the selective medium were identified by amplifying and sequencing their 16SrDNA as described by Ghauri et al.
The purpose of the current investigation was to develop a selective medium that could be utilized to survey for these spore-bearer bacteria in nature.
With the use of selective medium (VRB), coliform bacteria were found in the slaughtering room and in the samples taken from site 2/3 after receiving the carcasses.
The prepared dilution was taken with the help of a 1 ml sterilized pipette and poured into Petri plates which were containing 25 ml of Trichoderma selective medium (TSM).
The growth found an the selective medium were identified as H.
Campylobacter Blood Free Selective Medium will support the growth of most enteric Campylobacter.
The aerobic counts of bacteria kept in water stored in the brass vessel and then enumerated on a non selective medium (nutrient agar) represents the number of cells that are fully healthy and which are able to cope with ROS derived from the growth medium, whereas the increase in counts observed under ROS-neutralized conditions represents that fraction of cells whose defence systems are unable to cope under conventional aerobic conditions.
Inoculate the blood agar and selective medium using a special platinum loop calibrated to deliver either 0.
Transient mutational events leading to phase-variable colonies make it further difficult to identify the bacterium, on the basis of morphovars and pigmentation on selective medium [1].
coli and coliform colonies to stand out from any other organisms that may grow on the selective medium, allowing accurate colony counts to be obtained of each.

Full browser ?