Izindlela Zokuhlonza Izifo Zamagciwane
Izifo zamagciwane zisalokhu ziyinselele enkulu empilweni yabantu, yezilwane kanye neyezitshalo. Ukutheleleka ngamagciwane kungabangela izimpawu ezincane ezimweni ezisongela ukuphila, kuye ngohlobo lwamagciwane, indawo okutheleleke kuyo, isimo somzimba wesiguli, kanye nesivinini sokwelashwa. Ngakho-ke, ukuhlonza izifo zamagciwane okunembile nokusheshayo kubalulekile ekwelashweni okuphumelelayo, ikakhulukazi enkathini yokwanda kokumelana namagciwane. Lesi sihloko sixoxa ngezindlela ezahlukene zokuhlonza izifo zamagciwane, kusukela ezindleleni zokwelashwa kuya kumasu esimanje asekelwe kuma-molecule.
1. Ukuhlonza Ngokusekelwe Ezimpawini Zemitholampilo Nomlando Wesiguli
Isinyathelo sokuqala sokuhlonza isifo esibangelwa amagciwane sivame ukuqala ngokuhlolwa kwezokwelapha. Udokotela noma uchwepheshe wezempilo uzohlola izimpawu ezifana nomkhuhlane, ubuhlungu bendawo, ukukhwehlela okuphumayo, isifo sohudo, amanxeba abomvu, kanye nezimpawu ze-sepsis. Ngaphezu kwalokho, umlando wesiguli ubalulekile, kufaka phakathi umlando wokuhamba, ukudla ukudla okuthile, ukuxhumana nabantu abanegciwane, ukuchayeka endaweni ezungezile (amanzi, inhlabathi), ukusetshenziswa kwama-antibiotic ngaphambilini, noma izinqubo zezokwelapha ezifana nokufakwa kwe-catheter.
Nakuba kubalulekile, indlela yokwelapha inemikhawulo. Izifo eziningi zamagciwane zinezimpawu ezifana nokutheleleka ngamagciwane noma ngesikhunta, ngakho-ke ukuxilongwa okusekelwe kuphela ezimpawini ngokuvamile akunembile. Ngakho-ke, kudingeka ukuhlolwa okwengeziwe ukuqinisekisa igciwane elibangela lesi sifo.
2. Ukuhlolwa kwe-Microscopic: Ukudaya nge-Gram kanye nezinye izindlela
Enye indlela ejwayelekile kodwa ewusizo kakhulu ukuhlolwa nge-microscope. Indlela evame kakhulu ukufaka i-Gram staining, ehlukanisa amabhaktheriya abe yi-Gram-positive (purple) kanye ne-Gram-negative (pink). Lolu lwazi lusiza ukubikezela uhlobo lwebhaktheriya futhi lunqume ukukhetha kokuqala kwama-antibiotic ngaphambi kokuba kutholakale imiphumela yokukhula.
Amasampula angahlolwa kusetshenziswa i-Gram staining afaka phakathi i-sputum, igazi (ezimweni ezithile), uketshezi lwe-cerebrospinal, ama-wound swabs, uketshezi lwe-pleural, noma umchamo. Ngaphezu kwe-Gram staining, kukhona namabala akhethekile njenge-Ziehl–Neelsen yamagciwane ashesha ukuba ne-acid (isb., isifo sofuba se-Mycobacterium) kanye ne-fluorescent staining kwezinye izimo.
Izinzuzo zokuhlolwa nge-microscope ukuthi kuyashesha futhi kushibhile. Kodwa-ke, ukuzwela kwayo kuncike enanini lamagciwane kusampula kanye nekhwalithi yesampula. Ngaphezu kwalokho, akuwona wonke amagciwane abonakala kalula noma ahlukaniswa ngesimo sawo kuphela.
3. Isiko Lamagciwane: Izinga Legolide Lokuhlonza
Isiko livame ukubhekwa "njengendinganiso yegolide" yokuxilonga izifo zamagciwane. Amasampula emitholampilo akhuliswa ezindaweni ezithile ukuze avumele amagciwane akhule, bese ehlonzwa ngokusekelwe ezicini zekoloni, ukuhlolwa kwamakhemikhali, kanye namaphethini okukhula.
Imithombo yokukhula ingaba ejwayelekile (isb., i-agar yegazi, i-agar yezakhamzimba) noma i-selective-differential (isb., i-agar ye-MacConkey yamagciwane angenayo i-Gram). Ngemva kokuba amagciwane esekhulile, ilabhorethri ingenza uchungechunge lwezivivinyo ze-biochemical ezifana ne-catalase, i-coagulase, i-oxidase, ukuvutshelwa kukashukela, nokunye.
Inzuzo yokukhuliswa yikhono layo lokuqinisekisa ukuthi amagciwane aphilayo ayimbangela yokutheleleka futhi ivumela ukuhlolwa okwengeziwe, njengokuhlolwa kokuzwela kwama-antibiotic. Okubi kufaka phakathi isikhathi esidingekayo (ngokuvamile amahora angu-24-72, isikhathi eside nakakhulu kumagciwane athile), futhi akuwona wonke amagciwane akhuliswa kalula (alula) noma adinga izimo ezikhethekile.
4. Ukuhlolwa Kokuzwela Kwama-Antibiotic
Ukuhlonza izifo zamagciwane akugcini nje ngokuqamba amagama amagciwane. Ezimweni eziningi, ukwazi ukuthi yimaphi ama-antibiotic asebenzayo kubaluleke kakhulu. Ukuhlolwa kokuzwela kwama-antibiotic kwenziwa ngemva kokuba amabhaktheriya esehlukaniswe ngokukhuliswa kwawo.
Ezinye izindlela ezivame ukusetshenziswa:
– Ukusabalala kwediski (Kirby-Bauer): kubheka indawo yokuvinjelwa ezungeze idiski yama-antibiotic.
– I-MIC (Ukugxila Okuncane Kokuvimbela): inquma ukuhlushwa okuphansi kakhulu kwe-antibiotic evimbela ukukhula kwamagciwane, ngokuvamile ngendlela yokuxuba noma i-E-test.
– Ukuhlolwa kokuzwela okuzenzakalelayo: kusetshenziswa amathuluzi azenzakalelayo asheshayo futhi ahlelekile kakhudlwana.
Imiphumela yalezi zivivinyo isiza odokotela ukuthi bakhethe ukwelashwa okufanele kakhulu, banciphise ukusetshenziswa okungadingekile kwama-antibiotic e-broad-spectrum, futhi banciphise ingozi yokumelana nemithi.
5. Izindlela Ze-Serological: Ukuthola Ama-Antibodies noma Ama-Antigens
Kwezinye izifo, izindlela ze-serological zisetshenziselwa ukuthola ama-antibodies umzimba owakhiqiza ngokumelene namagciwane noma ukuthola ama-antigen amagciwane. Izibonelo zalolu hlelo lokusebenza zifaka phakathi umkhuhlane we-typhoid (ukuhlolwa okuthile), i-Helicobacter pylori (ukuhlolwa okuningana), noma izifo okunzima ukuzikhulisa.
Inzuzo ye-serology ukuthi ingathola impendulo yomzimba ngisho noma inani lamagciwane liphansi noma kunzima ukulihlukanisa. Kodwa-ke, i-serology ingaba nzima ukuyichaza ngoba ama-antibodies angaqhubeka isikhathi eside ngemva kokuba ukutheleleka sekuphelile, ngakho-ke awabonisi njalo ukutheleleka okusebenzayo. Ngakho-ke, i-serology ivame ukusetshenziswa njengokwengeza kudatha yezokwelapha kanye nezinye izivivinyo.
6. Ukuhlolwa Okusheshayo Kokuxilongwa
Intuthuko yezobuchwepheshe inikeze izinhlobo ezahlukene zokuhlolwa okusheshayo ezingenziwa ezikhungweni zezempilo ngemiphumela emifushane. Ukuhlolwa okusheshayo ngokuvamile kusekelwe ku-immunochromatography (okufana nemichilo yokuhlola) ukuthola ama-antigen ebhaktheriya noma izingxenye ezithile.
Izibonelo zokuhlolwa okusheshayo zifaka phakathi ukuthola i-streptococci emphinjeni obuhlungu noma ama-antigen athile kumasampula omtholampilo. Inzuzo yabo eyinhloko isivinini, okuvumela izinqumo zokwelapha ngokushesha. Kodwa-ke, ukuzwela kwabo kanye nokucaciswa kwabo kungahluka kuye ngohlobo lwedivayisi, ikhwalithi yesampula, kanye nesigaba sesifo.
7. Izindlela Zama-Molecular: I-PCR Nezinhlobo Zayo
Izindlela zama-molecule ziya ngokuya zibaluleke kakhulu ngoba zingakwazi ukubona izinto zofuzo zamagciwane (i-DNA/RNA) ngokuzwela okuphezulu. Indlela ethandwa kakhulu yi-PCR (Polymerase Chain Reaction), okuhlanganisa ne-PCR yesikhathi sangempela, enganikeza imiphumela esheshayo futhi ivumele ukulinganiswa okulinganiselwe.
I-PCR iwusizo kuma-bacteria okunzima ukuwakhulisa, izimo ezidinga ukuxilongwa okusheshayo, kanye nezimo lapho isiguli sesivele sithole ama-antibiotic, okungase kuholele ekukhuleni okungekuhle. Ngaphezu kwe-PCR eyodwa, i-multiplex PCR nayo iyatholakala, engathola amagciwane amaningi ngasikhathi sinye, isibonelo kumaphaneli okutheleleka kokuphefumula noma kwesisu.
Ububi bezindlela zama-molecule yizindleko eziphakeme, isidingo semishini nabasebenzi abaqeqeshiwe, kanye neqiniso lokuthi i-PCR ingathola i-DNA yebhaktheriya efile, ngakho-ke kumele ihunyushwe ngokucophelela embonweni wezokwelapha.
8. Ukuhlonza Okusekelwe ku-MALDI-TOF MS
I-MALDI-TOF (i-Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry) ubuchwepheshe besimanje obukhomba amabhaktheriya ngokusekelwe “ezinyathelweni zeminwe” zamaprotheni. Uma i-bacterial isolate isitholwe esikweni, i-MALDI-TOF ingakunikeza ukuhlonza ngemizuzu embalwa.
Izinzuzo zayo zifaka phakathi isivinini, ukunemba kwezinhlobo eziningi zamagciwane, kanye nokusebenza kahle kwamalabhorethri anenani elikhulu lamasampula. Kodwa-ke, imishini iyabiza futhi isadinga isigaba sokukhulisa sangaphambilini kwezinqubo eziningi, yize ezinye intuthuko zivumela ukusetshenziswa okuqondile kwamasampula athile.
9. Ukulandelana Kwezakhi Zofuzo Neze-Metagenomic
Ezimweni eziyinkimbinkimbi, ikakhulukazi lapho i-pathogen kunzima ukuyibona, amasu okulandelana njengokulandelana kwe-16S rRNA noma ukulandelana kwe-genome ephelele angasetshenziswa. Lezi zindlela zivumela ukuhlonza amagciwane kuze kufike ezinhlotsheni ngisho nasezingeni lohlobo, kanye nokuhlonza izakhi zofuzo zokumelana.
I-Metagenomics (isb., ukulandelana kwesizukulwane esilandelayo ngqo kusuka kumasampula emtholampilo) ingakhomba uhla olubanzi lwezinambuzane ezincane ngaphandle kwesidingo sokutshala. Le ndlela inesithembiso esikhulu sokutheleleka okukhulu okungakahlolwa, i-sepsis engenalo isiko, noma ukutheleleka okuxubile. Izinselele zifaka phakathi izindleko eziphakeme, izidingo ze-bioinformatics, kanye nengozi yokungcola, okungathinta ukuchazwa.
Isiphetho
Izindlela zokuhlonza izifo zamagciwane ziyaqhubeka nokuguquka, kusukela ezindleleni ezivamile ezifana nokufaka i-Gram staining kanye nokukhulisa kuya emasu esimanje njenge-PCR, i-MALDI-TOF, kanye nokulandelana. Ayikho indlela eyodwa engcono kakhulu kuzo zonke izimo. Ukukhetha indlela kuncike ohlotsheni lokutheleleka, amasampula atholakalayo, ukuphuthuma, izinsiza zelebhu, kanye nezinhloso zezokwelapha (isb., ukuhlonza okulula noma ukuhlolwa kokumelana ngesikhathi esifanayo). Ukuhlanganiswa kokuhlolwa kwezokwelapha okunengqondo kanye nezindlela zelebhu ezifanele kuzoholela ekuxilongweni okunembile, kusekele ukusetshenziswa kwama-antibiotic okunengqondo, futhi ekugcineni kuthuthukise ukuphepha kwesiguli kanye nekhwalithi yokunakekelwa.
