Gram's stain

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Gram's stain

a stain taken up by the Gram-positive bacteria that differentiates these from bacteria which fail to take up the stain (Gram-negative types). The initial stain is crystal violet/iodine complex, and Gram-negative bacteria are decolorized with alcohol whilst Gram-positive bacteria retain a blue/purple colour.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Gram's stain

A stain used in microbiology to classify bacteria and help identify the species to which they belong. This identification aids in determining treatment.

Mentioned in: Aminoglycosides, Diphtheria

References in periodicals archive ?

(9) Results of that method were similar to fecal Gram's stain (FGS) results on the same samples.

Fecal samples were smeared onto glass microscope slides, heat fixed, and stained with Gram's stain (Jorgensen Laboratories, Loveland, CO, USA) on the day of collection.

Comparison of two methods for determining prevalence of Macrorhabdus ornithogaster in a flock of captive budgerigars (Melopsitiacus undulatus)

If conditions are not favorable for RUT + Gram's stain + IgG Serology, which includes invasive tests also, then IgG serology which is a non-invasive test and was the best because it showed 100% Sensitivity, 100% negative predictive value and also it was a non-invasive test.

Direct Gram's stained smear is an invasive, highly specific, rapid screening test and if resources are limited may obviate the need for additional testing of positive specimens.

Study of diagnostic tests for Helicobacter pylori infection

Microscopic analysis of all 11 urine culture positive samples showed pus cells in 5 (45.45%) and Gram's stain smear showed bacteria in 9 (81.81%).

Evaluation of asymptomatic bacteriuria in antenatal women AT CU Shah Medical College & Hospital, Surendranagar, Gujarat

The subset of women who had intermediate-grade bacterial vaginosis at baseline according to Gram's stain scores were more likely than those with high-grade bacterial vaginosis to have lower cure rates if they took lactobacillus and did not become colonized.

Lactobacillus capsule in bacterial vaginosis on hold. (Trial of New Formulation Planned)

They found that the subset of women who had intermediate-grade BV at baseline according to Gram's stain scores were more likely than those with high-grade BV to have lower cure rates if they took lactobacillus and did not become colonized.

Research on capsule for recolonizing lactobacillus after BV hits snag. (Used with Single dose of Metronidazole)

Fortunately, Gram's stain, devised by a Danish pathologist in 1884, exists (see "The man behind Gram's stain," page 26, and "A revolution in staining begins," page 27).

Gram's stain: The key to microbiology

Sample material from each swab was then transferred directly to a microscope slide for a Gram's stain or used to inoculate sheep's blood and MacConkey agar plates for culture.

Measuring the level of agreement between cloacal gram's stains and bacterial cultures in Hispaniolan Amazon parrots (Amazona ventralis)

Yearly testing includes a standard CBC, fecal direct smear, and fecal Gram's stain. Weaning birds may receive a Gram's stain of a crop wash.

Preventive avian medicine--what are your recommendations?

In the present study, urostrips was positive in 41.85%(113/270) of HIV positives and 9%(9/100) of HIV seronegatives and Gram's stain was positive in 9.6%(26/270) HIV Positives and 3%(3/100) HIV negatives.

Asymptomatic bacteriuria in HIV/AIDS patients: occurrence and risk associated with low CD4 counts

Gram's stains and acid-fast bacilli smears taken from the abscess were negative.