Igwe ara ehi akpa akpaka, ọ nwere ike rụchaa usoro akpa, na-ejuputa, akara aka, na ịkpụ.
Iji ụkpụrụ nke fecteration, lactic acid acciation na-eme ka iku ume anaerobic na gburugburu anaerobic gburugburu ebe obibi, nke a na-eji eme yogọt.
