Gram stain

(redirected from Gram staining)
Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.

Gram stain

 (grăm) also Gram's stain (grămz)
n.
A staining technique used to classify bacteria in which a bacterial specimen is first stained with crystal violet, then treated with an iodine solution, decolorized with alcohol, and counterstained with safranin. Because of differences in cell wall structure, gram-positive bacteria retain the violet stain whereas gram-negative bacteria do not. Also called Gram's method.

[After Hans Christian Joachim Gram (1853-1938), Danish physician.]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Gram stain - a staining technique used to classify bacteria; bacteria are stained with gentian violet and then treated with Gram's solution; after being decolorized with alcohol and treated with safranine and washed in water, those that retain the gentian violet are Gram-positive and those that do not retain it are Gram-negative
staining - (histology) the use of a dye to color specimens for microscopic study
References in periodicals archive ?
aureus isolates were collected from five hospital and five restaurant lobbies in the Nashville area and continued ny gram staining and mannitol fermentation.
During a sterile speculum exam cervical fluid was obtained with cellulose wicks, a vaginal swab was obtained for Gram staining and Nugent scoring, and a vaginal ultrasound for cervical length was performed.
Gram staining and CSF culture were performed for 144 samples (56.
On all media, the placental swab sample yielded moderate growth of tiny colonies, which Gram staining indicated were gram-positive coccobacilli.
The Snot Buster and Sputum Dipper provide a convenient and ready-to-use system for improving processing and quality of results from sputum specimens in terms of both culture and Gram staining analysis.
When he spots a patient with early signs of wound infection, he makes liberal use of ultrasound to determine if there is a loculated area of fluid collected in the wound, and to guide aspiration of a fluid sample for Gram staining and culture.
Alcohol acetone to gram staining (1000ml),cholesterol,creatinine,glucose,urea nitrogen etc.
Microbiology stainers provide high-quality Gram staining and different natural or fluorescent acid-fast stains for mycobacteria.
Gram staining was conducted on 3 patients' pleural effusion but none of them showed positive results.
Gram staining is one of the most important procedures performed in a microbiology laboratory.
After Gram staining, a sample of the abscess drainage was injected onto Columbia agar with 5% sheep blood (bioMerieux, Marcy l'etoile, France) under 5% C[O.
screened 519 pregnant women for chlamydia and gonorrhea using Gram staining, the results of which were compared against the current benchmark, DNA probe testing.