Sepsis, also called septicaemia, septicemia, bacteremia or blood poisoning, is a potentially deadly medical condition that is characterized by a systemic inflammatory response syndrome (SIRS). The inflammation of the entire body can be caused by the presence of pathogenic organisms in the bloodstream. 

Sepsis gets worse very quickly. It can arise from infections throughout the body. It is usually caused by but not limited to bacteria.

Other diseases, such as meningitis, epiglottitis or pneumonia, can be associated to the sepsis. If sepsis is associated with meningococcal, it can lead to shock or adrenal collapse.

Sepsis can be difficult to diagnose. However, blood tests can reveal if the amount of white blood cells is abnormal. Additional tests include:

- Urine test.

- Sputum test.

- Wound secretion tests.

- Imaging tests such as X-ray, MRI or CT scan can help to determine the site of infection.