New Jersey health officials report that 31 patients developed infections after receiving injections to treat knee pain at the Osteo Relief Institute in Wall Township. The New Jersey Department of Health says the patients developed cases of septic arthritis, a painful infection surrounding their joints. The infections are all linked to the Osteo Relief Institute Jersey Shore.

Health officials investigated the institute and found multiple infection control and injection safety breaches. Many of the patients required surgery to treat the infection. The investigation involves the health department, the state Division of Consumer Affairs, and the Monmouth County Regional Health Commission.

Osteo Relief Institute Jersey Shore voluntarily stopped administering injections and closed on March 8. The clinic sent notification letters to patients who were treated in March, according to the Department of Health. Most of the patients are from Ocean and Monmouth Counties.

The Department of Health is looking for additional cases of septic arthritis following injections received at the institute from Sept. 1, 2016 through March 6, 2017.