Gram-positive bacteria show blue or purple after Gram-staining in a laboratory test. They have thick cell walls. Gram-negative bacteria show pink or red on staining and have thin walls.

Gram-negative bacteria have the ability to cause a lot of diseases in humans. They can reach almost all of the organ systems. Your doctor may need to try several antibiotics to beat the infection.

The Infectious Diseases Society of America (IDSA) 2024 guidance on the treatment of AMR gram-negative infections has been published.

First, gram-negative bacteria have a thin cell wall that is about 1.5 to 10 nanometers across, whereas gram-positive bacteria have a thick cell wall measuring about 20 to 80 nanometers.

Please use one of the following formats to cite this article in your essay, paper or report: APA. Singh, Ankit. (2025, March 11). Advanced Microscopy Techniques in STI Detection.

Thirteen of the patients also exhibited a local genital or urinary infection from which gonococci were cultured or which showed gram-negative diplococci on smear. There were 9 men and 8 women.

Gram-positive and gram-negative bacteria differ in the composition of their cell walls. Gram-negative bacteria have a double layer of protection, making them more difficult to kill, Muñoz said.

A team led by Paul Hergenrother at the University of Illinois Urbana-Champaign has discovered a new antibiotic that exclusively targets gram-negative bacteria and avoids wiping out the ecosystem ...

Thus, in addition to syndromic approach, light microscopic examination of Gram-stained smears to support a urogenital gonorrhoea diagnosis is recommended.2 6 12 Two light microscopic findings are used ...

Gram-stain photomicrograph of a urethral exudate, revealing both intracellular and extracellular gram-negative diplococci, Neisseria gonorrhoeae, 1974. Image courtesy Centers for Disease Control ...