Proteobacteria

Proteobacteria is a large and diverse group of bacteria that includes many familiar and important species. They are found in various environments such as soil, water, and living organisms. Some proteobacteria play crucial roles in processes like nitrogen fixation, helping plants get nutrients, while others can cause diseases in humans, animals, and plants. This group includes bacteria like Escherichia coli and Salmonella. Their diversity reflects a wide range of functions, from beneficial to harmful, making proteobacteria a key part of Earth's ecosystems and health.