Comissao Atletica Brasileira de MMA (CABMMA) announced Monday that the 24 fighters that competed at UFC Fight Night 36 card were tested, and all test results came back negative.
UFN 36 took place at the Arena Jaragua in Jaragua do Sul, Brazil, on Feb. 15.
Lyoto Machida headlined the card opposite of former Strikeforce light heavyweight champion Gegard Mousasi and came out with the victory via unanimous decision. Ronaldo Souza moved to 3-0 under the Zuffa banner with a win over Francis Carmont in the co-main event.
The UFC is scheduled to return to Brazil on March 23 at the Ginasio Nelio Dias in Natal, Rio Grande do Norte, with a light heavyweight clash between Mauricio Rua and Dan Henderson.