Differences between Gram positive and Gram negative bacteria include the thickness of the cell wall, which is approximately 20 to 30 nanometers thick in Gram positive and 8 to 12 nanometers thick in Gram negative; the am... More »

Examples of Gram-negative bacteria species include Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, Vibrio cholerae and Neisseria gonorrhoeae. Escherichia coli is a Gram-negative bacterium that causes foo... More »

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In microbiology, gram staining is an important test used because it can determine the presence of bacteria in a sample, as well as differentiate between the two distinct bacteria species, which are gram-positive and gram... More »

Gram-negative bacilli are rod-shaped bacteria that have a thin layer of peptidoglycan between two membranes. They are medically significant as many strains can cause infection in humans, including the family Enterobacter... More »

Gram-negative rods, or bacilli, are rod-shaped bacteria that give a negative result with Gram staining. These bacteria have a thin peptidoglycan layer sandwiched between the inner and outer cell membrane. This layer is r... More »

A Gram stain showing gram-positive cocci in pairs, or diplococci, is a morphological characteristic of several bacteria. Gram stains can be positive or negative, depending on the cell wall composition of the bacteria. Mo... More »

Infections that are caused by gram negative bacteria include intestinal infections caused by the E. coli bacteria, peptic ulcers and Legionnaires' disease, according to Healthline, Mayo Clinic, Highveld and MedlinePlus. ... More »