nutrient agar

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Related to nutrient agar: blood agar, MacConkey agar

nu·tri·ent a·gar

a simple solid medium containing beef extract, peptone, agar, and water; used for growing many common heterotrophic bacteria.


a dried hydrophilic, colloidal substance extracted from various species of red algae. When suspended in a liquid medium and heated to 212°F (100°C), the agar dissolves. When it is allowed to cool to 110°F (43°C) the medium becomes a solid gel. It is used in culture media for bacteria and other microorganisms, in making emulsions, and as a supporting medium for immunodiffusion and immunoelectrophoresis. Because of its bulk it is also used in medicines to promote peristalsis and relieve constipation.

birdseed agar
one containing Guizotia abyssinicia (Niger) seed and creatinine, used for growing Cryptococcus neoformans. Called also Niger agar.
bismuth sulfite agar
a special preparation used for isolation of salmonellae from food.
blood agar
a culture medium used for the growth of bacteria. Consists of agar and intact erythrocytes.
brain heart infusion agar
used for cultivating the yeast phase of dimorphic fungi.
brilliant green agar
used to cultivate salmonellae.
chocolate agar
an enriched agar for the growth of Hemophilus, some Actinobacillus, and Taylorella spp. A molten agar and blood mixture is held at 122°F (50°C) prior to pouring plates. The additional nutrients supplied are hemin and NAD.
agar diffusion test
see antimicrobial sensitivity test.
eosin-methylene blue (EMB) agar
used for the identification of Eschericha coli.
agar gel immunodiffusion test
see immunodiffusion tests.
MacConkey agar
contains bile salts, lactose and neutral red indicator for isolation of enterobacteria.
mannitol salt agar
selective for staphylococci.
milk agar
contains skim milk and used to demonstrate casein digestion.
Niger seed agar
see birdseed agar (above).
nutrient agar
the basic growth medium for bacteria, composed of beef extract and peptone.
potato dextrose agar
used in cultivating fungi; promotes sporulation and pigmentation.
Sabouraud's dextrose agar
one used for isolation of fungi. See also dermatophyte test medium.
agar sausage
see medium sausage.
xylose lysine (XLD) agar
used to differentiate Enterbacteriaceae.
References in periodicals archive ?
76 White sterile mycelia -- -- Yeast -- -- Gross Total Count Total number of genera Total number of species Table 4: Bacterial isolates and sensitivity test results from sea water and submerged sand of the Red Sea near Saudi Arabia in nutrient agar.
Samples were inoculated by touching the tip of the component to the surface of the nutrient agar plate immediately after spreading the plate with 103, 104 or 105 cells of methicillin-resistant S.
A general purpose medium, Lab M's Nutrient Agar (ISO) is intended for the cultivation of a wide range of non-fastidious micro-organisms.
Each colony was used to inoculate a nutrient agar slant and a tube of trypticase soy broth.
When our geneticists rescue that embryo they, place it in a test tube with nutrient agar to keep it going until the young plant can collect sunlight on its own" (Jackson, pers.
Prodigiosin synthesis on Tryptic Soy and Nutrient Agar supplemented with glucose, lactose, sucrose, or sorbitol was evaluated and colonies were subjected to growth on Triple Sugar Iron slants.
Cultures of test organisms were maintained on nutrient agar slants and were subcultured in Petri dishes prior to testing.
This microbe-containing soil will be grown on autoclaved T-Soy nutrient agar containing different concentrations of the Malathon and Diazinon pesticides.
The quantity and kinds of bacteria found on them will be determined using nutrient agar and Mac Conkey Agar, and stained using gram positive and safranin stains.
stearothermophilus (ATCC 12980) in a 40 percent solution of glycerol was removed from the freezer, streaked onto a nutrient agar plate, and incubated for several days at 60 [degrees] C (140 [degrees] F).