Quanah Parker is credited as one of the first important leaders of the Native American Church movement. Quanah Parker adopted the peyote religion after having been gored in southern Texas by a bull. Parker was visiting his uncle, John Parker, in Texas where he was attacked, giving him severe wounds. To fight an onset of blood burning fever, a Mexican curandera was summoned and she prepared a strong peyote tea from fresh peyote to heal him. Thereafter, Quanah Parker became involved with peyote, which contains hordenine, mescaline or phenylethylamine alkaloids, and tyramine which act as natural antibiotics when taken in a combined form. Clinical studies indicate that peyocactin, a water-soluble crystalline substance separated from an ethanol extract of the plant, proved an effective antibiotic against 18 strains of penicillin-resistant "Staphylococcus aureus", several other bacteria, and a fungus.