Gram-negative bacteria are one of the most common types of microorganisms that cause infections. These bacteria contain a cell wall that is structurally different from those of gram-positive bacteria. They are often characterized by their ability to resist many antibiotics and are associated with many infections, including urinary tract infections, pneumonia, and blood infections. Additionally, these microorganisms can be referred to by a variety of different terms, including negative bacteria, gram-ve bacteria, and gram-negative bacilli. While these terms are used interchangeably, they all refer to the same type of bacteria, which is characterized by its ability to resist many antibiotics and cause a wide variety of health problems.