Kudzivirira kweZvidiki zveGandapaganda
Matumbu emafuta anoburitsa mafuta, ayo anogadziriswa netumbuyu kuti agadzire lipid film yakasanganiswa. Mafirimu aya ane mafuta acids akasununguka, anozivikanwawo semafirimu easitimu, anogona kubvisa zvinhu zvine alkaline zvakasvibiswa paganda uye kudzivirira mabhakitiriya ekunze (anopfuudza mabhakitiriya). , fungus nezvimwe tupukanana tunokonzera zvirwere zvinokura, saka basa rekutanga rezvirimwa zveganda zvakajairika ibasa guru rekudzivirira.
Kupinda kweganda nezvimedu zvaro, kusanganisira ma "sweat glands" (dikita glands), ma "sebaceous glands", uye "hair follicles", zvine maruva azvo akasiyana. Ma "sebaceous glands" anobatanidza ma "hair follicles" kuti aumbe "follicular sebaceous unit", iyo inoburitsa mafuta akawanda anonzi sebum. Sebum i "hydrophobic protective film" inodzivirira uye inonyorovesa ganda nebvudzi uye inoshanda se "antibacterial shield". Ma "sebaceous glands" haana oxygen yakawanda, achitsigira kukura kwe "facultative anaerobic bacteria" sengeMapundu eP., ine P. acnes lipase inoparadza sebum, inodzima triglycerides mu sebum, uye inoburitsa free fatty acids. Mabhakitiriya anogona kunamatira kune aya free fatty acids, ayo anobatsira kutsanangura kupinda kwe sebaceous glands neP. acnes, uye aya free fatty acids anobatsirawo mu acidity yeganda (pH ye5). Mabhakitiriya mazhinji anowanzo konzera chirwere, akadai seStaphylococcus aureus neStreptococcus pyogenes, anodziviswa munzvimbo ine acidity uye nekudaro anobatsira kukura kwe coagulase-negative staphylococci ne coryneform bacteria. Zvisinei, kuvharika kweganda kunoguma nekuwedzera kwe pH izvo zvinozobatsira kukura kwe S. aureus ne S. pyogenes. Nekuti vanhu vanogadzira sebum triglycerides yakawanda kupfuura dzimwe mhuka, P. acnes yakawanda inounganidza ganda revanhu.
Nguva yekutumira: Chikumi-27-2022
