Former NFL star Mike Williams's death was a result of bacterial sepsis from poor dental health, according to a report released by the Medical Examiner's Office in Hillsborough County, Florida, on Thursday.

The former wide receiver for the Buffalo Bills and the Tampa Bay Buccaneers was taken off life support on Sept. 12 and died at the age of 36 after suffering a head injury during a construction accident in Aug. The injury led to acute hypoxic respiratory failure, cardiac arrest, and multiple brain abscesses.

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The Medical Examiner's Office has not released the full autopsy results but did share that the football star died from "bacterial sepsis with cerebral abscesses and necrotizing lobar pneumonia due to multiple dental caries and retained dental roots."

Sepsis is a life-threatening bodily reaction to an infection, which without rapid treatment can lead to tissue damage, organ failure, and death. Although most sepsis results from bacterial infections, viruses can result in sepsis as well.

In Williams's case, oral bacteria due to poor dental hygiene was the cause of the sepsis infection, according to the information shared by the medical examiner.

A scientific article published in January in the British Dental Journal found that oral infections may be a cause of brain abscesses in patients diagnosed with the condition who do not present with any other symptoms of infection.

Other studies have found that oral bacteria as a result of poor dental health and dental work on the upper molars pose a risk of serious consequences should an infection go untreated.

Williams also suffered from arteriosclerotic cardiovascular disease, or a buildup of fat and cholesterol on the walls of his arteries.

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Williams used marijuana and the quasilegal herb kratom, as well as drank alcohol, which carry cardiovascular risks, according to ESPN.

At least 1.7 million adults develop sepsis annually, according to the Centers for Disease Control and Prevention, and 1 in 3 people who die in a hospital had sepsis during their hospitalization.