Isiphumo Sokukhusela seI-Microecology yolusukwiLusu
Ii-sebaceous glands zikhupha ii-lipids, ezithi zigaywe zii-microorganisms ukuze zenze i-lipid film ehlanganisiweyo. Ezi lipid films ziqulathe ii-fatty acids zasimahla, ezaziwa ngokuba zii-acid films, ezinokuthomalalisa izinto ze-alkaline ezingcoliswe eluswini kwaye zithintele iintsholongwane zangaphandle (ezidlula iibhaktheriya). , iifungi kunye nezinye ii-microorganisms ezibangela izifo ziyakhula, ngoko ke umsebenzi wokuqala wezityalo zesikhumba eziqhelekileyo ngumphumo obalulekileyo wokukhusela.
Ukungena kolusu kunye nezitho zomzimba, kuquka ii-sweat glands (ii-sweat glands), ii-sebaceous glands, kunye nee-hair follicles, zinezityalo zazo ezikhethekileyo. Ii-sebaceous glands zidibanisa ii-hair follicles ukuze zenze i-follicular sebaceous unit, ekhupha i-lipid etyebileyo ebizwa ngokuba yi-sebum. I-Sebum yifilimu ekhuselayo ekhusela kwaye ithambise ulusu kunye neenwele kwaye isebenza njengesikhuselo se-antibacterial. Ii-sebaceous glands azina-hypoxic, zixhasa ukukhula kweebhaktheriya ze-anaerobic ezifana neIi-P. acnes, equlethe i-P. acnes lipase eyonakalisa i-sebum, i-hydrolyzes triglycerides kwi-sebum, kwaye ikhuphe ii-free fatty acids. Iibhaktheriya zinokunamathela kwezi free fatty acids, ezinceda ukuchaza ukuhlanganiswa kwee-sebaceous glands yi-P. acnes, kwaye ezi free fatty acids nazo zinegalelo kwi-acidity yomphezulu wesikhumba (pH ye-5). Iibhaktheriya ezininzi eziqhelekileyo ezibangela izifo, ezifana ne-Staphylococcus aureus kunye ne-Streptococcus pyogenes, zithintelwa kwindawo ene-acidic kwaye ngaloo ndlela zilungele ukukhula kwe-coagulase-negative staphylococci kunye ne-coryneform bacteria. Nangona kunjalo, ukuvaleka kwesikhumba kubangela ukwanda kwe-pH eya kunceda ukukhula kwe-S. aureus kunye ne-S. pyogenes. Ngenxa yokuba abantu bavelisa i-sebum triglycerides engaphezulu kunezinye izilwanyana, ii-P. acnes ezininzi zihlala eluswini lomntu.
Ixesha lokuposa: Juni-27-2022
