Gram positive and Gram negatve

GRAM POSITIVE AND GRAM NEGATIVE

Gram-negative bacteria are bacteria that do not retain crytal violet dye in the Gram staining protocol. In a Gram stain test, a counterstain (commonly safranin) is added after the crystal violet, coloring all Gram-negative bacteria with a red or pink color.

On the other hand, Gram positive bacteria will retain the crystal violet dye when washed in a decolorizing solution.

This is a list of microorganisms Gram positive :

Gram positive -Actinomyces, Baccillus anthracis, Bacillus cereus, Clostridium, Clostridium difficile, Corynebacterium diphteriae, Enterococcus, Lactobacillus, Lactococcus, Listeria monocytogene, Microbacterium, Micrococcus, Peptostreptococcus, Pneumococcus, Staphylococcus, Staphylococcus aureus, Staphylococcus saprophyticus, Streptococcus, Streptococcus agalactiae (groupe B), Streptococcus β hémolytique, Streptococcus bovis, Streptococcus mitis, Streptococcus pneumoniae (ou Pneumococcus), Streptococcus pyogenes, Streptococcus salivarius,.

This is a list of microorganisms Gram negative:

Gram negative - Aeromonas, Bacteroïdes fragilis, Bartonella henselae, Bordetella pertussis, Bordetella parapertussis, , Brucella, Burkholderia cepacia, Campylobacter, Enterobacter aerogenes, Enterobacter sakazakii, Enterobacteriaceae, Escherichia coli, Francisella tularensis, Fusobacterium, Fusobacterium Necrophorum, (gonorrhoeae meningitidis n’existe pas), Haemophilus, Haemophilus ducreyi, Haemophilus influenzae, Helicobacter pylori, Legionella, Legionella pneumophila, Moraxella catarrhalis, (anciennement Branhamella catarrhalis), Neisseria, Neisseria meningitidis, Photobacterium, Proteus, Pseudomonas, Pseudomonas aeruginosa, Salmonella, Salmonella typhi, Shigella, Stenotrophomonas maltophilia), (anciennement Xanthomonas maltophilia), Veillonella, Vibrio cholerae, Yersinia enterocolitica

Nor Gram positive or negative : Aspergillus, Candida, Candida albicans, Chlamydia, Mycoplasma pneumoniae, Mycoplasma et Ureaplasma, Trichophyton

Variable Gram : Gardnerella vaginalis, Mycobacterium, Nocardia