What causes septic infection?

Septic infection, or sepsis, is caused by the body's extreme response to an infection, which can arise from bacteria, viruses, fungi, or parasites. Common sources include pneumonia, abdominal infections, urinary tract infections, and skin infections. When pathogens enter the bloodstream, the immune system releases chemicals that can lead to widespread inflammation, resulting in tissue damage and organ failure. Prompt recognition and treatment are crucial to prevent severe complications or death.