Gram-negative bacteria

Gram-negative bacteria are a group of bacteria characterized by their cell wall structure, which contains a thin layer of peptidoglycan surrounded by an outer membrane. This outer membrane can make them more resistant to antibiotics and other treatments. They typically appear pink under a microscope after a specific staining process called Gram staining. Gram-negative bacteria include many that are harmful, like E. coli and Salmonella, but some are beneficial and play important roles in ecosystems. Understanding their structure helps in developing medical treatments and managing infections.