Ekoki kouta na infection, ba allergies, pollution ya mopepe, to nkokoso mpo na ndenge ya kati ya zolo. Ba cas mingi elandanaka na infection ya virus. Infection ya bactérie ekoki kobimela soki bilembo biumeli koleka mikolo zomi to soki bokono ekomi lisusu makasi epayi ya mokoni sima na ntango abandi koyoka mua malamu. Bokono kozongelaka sima na bileko ekomelaka mingi baye baza na maladi ya mpema, fibrose cystique, mpe bokengi mabe ya nzoto. Esengelaka te kosalela ba rayons-X soki kaka emonani neti mikakatano mizali. Mpo na bas oyo ezongaka mbala na mbala, esengelaka kosala ba teste mpo na confirmation, ezala ya kotala na miso to ya tomographie na ordinateur.