Which of the following is NOT a type of acute radiation syndrome?

Acute radiation syndrome (ARS) is a collection of health effects that result from exposure to high doses of ionizing radiation in a short period. The recognized types of acute radiation syndrome are hematopoietic, central nervous system, and gastrointestinal syndromes, each presenting with distinct clinical symptoms and timelines based on the dose and type of radiation exposure.

Hematopoietic syndrome affects blood cell production, leading to symptoms such as anemia, increased susceptibility to infections, and bleeding due to a decrease in red and white blood cells and platelets. Central nervous system syndrome is characterized by severe neurological symptoms, including confusion, ataxia, and loss of consciousness, typically occurring after exposure to extremely high doses of radiation. Gastrointestinal syndrome involves damage to the cells lining the intestines, resulting in nausea, vomiting, diarrhea, and dehydration.

In contrast, "infectious" does not represent a recognized type of acute radiation syndrome. Although infections can occur as a secondary complication of the immunosuppression caused by hematopoietic syndrome, it is not classified as a standalone category of acute radiation syndrome. Therefore, identifying "infectious" as not a type of acute radiation syndrome is accurate, as it does not fit the criteria or pathophysiological effects