Gram positive


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Related to Gram positive: Gram negative

Gram positive

Used of a micro-organism that when stained by Gram's method resists decolorization with acetone and retains the methyl violet dye, thus appearing blue, purple or black. The reaction to Gram's stain depends on the structure of the cell wall of the organism. Most infective organisms, such as staphylococci and streptococci are Gram positive.
References in periodicals archive ?
Our findings support the use of FA-BCID as an antimicrobial stewardship tool, even more so with Gram positive bacteremia.
The antimicrobial potential of eight novel disperse dyes was assessed against three (03) different Gram Positive bacterial cultures (Bacillus subtilis, Staphylococcus aureus and Staphylococcus epidermidis) and eight (08) different Gram Negative bacterial cultures (Klebsiella pneumoniae, Proteus sp, Pseudomonas aeruginosa, Salmonella typhi and S.
Most of the Gram positive organisms showed oxacillin resistance.
Mean duration of ICTD was significantly higher in Gram negative empyema group (39.5 days) compared to 17 days in Gram positive empyema group.
All Gram positive isolates were sensitive to vancomycin in our study, a fact also supported by other studies.9,23,29,36 More than half of S aureus isolates were resistant to ciprofloxacin; similar results were reported in two Iranian studies.9,21 Majority of E coli isolates were resistant to cefuroxime, cefotaxime, ciprofloxacin and clavulanic acid in our study, similar to some other studies.5,7,9,21,35
We found that the majority of patients in our study (65%) revealed gram positives, while only 31% revealed gram negatives.
Experts note that "only thick walled organisms can be Gram-positive because the wall acts as a permeability barrier restricting diffusion of the crystal violet:mordant complex." [7] The peptidoglycan layer in Gram positives is, on average, 10-15 times thicker than that in Gram negatives.
Out of 78 bacterial isolate, 31(39.74%) were gram positive cocci and 47(60.25%) were gram negative bacilli.
In an other study metal salts, FeSO4, CuSO4, MnO2 (4.8mMol) has been used against wide range of Gram positive and Gram negative bacteria [8].
Results: The analysis of the culture showed that 41% were cultured positive with gram positive bacteria Staphylococcus aureus 52.5% and Staphylococcus epidermidis 30.1% and Micrococci 8.3%.
Contract awarded for code set 1,445 atcc strains gram positive for quality control, game