Kudzivirira Mhedzisiro yeSkin Microecologypa Skin
Iyo sebaceous glands inoburitsa lipids, iyo inogadziriswa nema microorganisms kuti iite emulsified lipid firimu. Aya lipid mafirimu ane emahara fatty acids, anozivikanwawo semafirimu easidhi, anogona kudzikamisa alkaline zvinhu zvakasvibiswa paganda uye kuvharisa mabhakitiriya ekunze (kupfuura mabhakitiriya). , fungi uye mamwe pathogenic microorganisms anokura, saka basa rekutanga remazuva ose emiti yeganda chinhu chinokosha chekudzivirira.
Kupinda mukati meganda nemaappendages, kusanganisira dikita glands (sweat glands), sebaceous glands, uye bvudzi follicles, zvine maruva azvo akasiyana. Iyo sebaceous glands inobatanidza mafollicles ebvudzi kuti iite follicular sebaceous unit, iyo inovanza yakapfuma lipid substance inonzi sebum. Sebum ndeye hydrophobic inodzivirira firimu inodzivirira uye inozora ganda nebvudzi uye inoita senge antibacterial nhovo. Iyo sebaceous glands ine hypoxic, inotsigira kukura kweiyo facultative anaerobic mabhakitiriya akadaiP. acnes, iyo ine P. acnes lipase inoderedza sebum, hydrolyzes triglycerides mu sebum, uye inobudisa emahara fatty acids. Utachiona hunogona kuomerera kune aya emahara emafuta acids, ayo anobatsira kutsanangura colonization ye sebaceous glands neP. acnes, uye aya emahara fatty acids anobatsirawo kune acidity yeganda repamusoro (pH ye5). Mazhinji mabhakitiriya epathogenic, akadai seStaphylococcus aureus uye Streptococcus pyogenes, anovharirwa munzvimbo ine acidic uye nekudaro akanakira kukura kwecoagulase-negative staphylococci uye coryneform mabhakitiriya. Zvisinei, kuvhara kweganda kunoguma nekuwedzera kwepH iyo inofadza kukura kweS aureus uye S. pyogenes. Nekuti vanhu vanogadzira sebum triglycerides yakawanda kupfuura dzimwe mhuka, maP. acnes akawanda anokonesa ganda remunhu.
Nguva yekutumira: Jun-27-2022
