Which bacteria is gram-negative bacteria?

Gram-negative bacteria are characterized by a thin peptidoglycan layer surrounded by an outer membrane. This outer membrane contains lipopolysaccharides, which can contribute to virulence and immune evasion. Examples of gram-negative bacteria include Escherichia coli, Salmonella, Pseudomonas aeruginosa, Neisseria gonorrhoeae, and Vibrio cholerae. Gram-negative bacteria generally resist certain antibiotics due to the outer membrane acting as a barrier, and they often produce endotoxins.