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Xa inja ngequbuliso iqala ukuhlanza nokurhuda, okanye ikati iba buthathaka ize iphelelwe ngumdla wokutya, oogqirha bezilwanyana badla ngokucebisa ukuba kwenziwe uvavanyo lwe-nucleic acid.
Musa ukuqonda into engalunganga—oku akukokuvavanya izilwanyana zasekhaya i-COVID-19. Endaweni yoko, kubandakanya ukukhangela “i-genetic ID” yentsholongwane ukuze kubonwe ukuba ingaba zosulelwe ziintsholongwane eziqhelekileyo ezifana ne-parvovirus okanye ii-coronavirus.
Thatha imizekelo ye-parvovirus (intsholongwane ye-DNA) kunye ne-coronavirus (intsholongwane ye-RNA).
Yonke inkqubo yovavanyo ingahlulwahlulwa ibe yingqiqo enamanyathelo amathathu "yokufuna ubungqina", ekulula ukuyiqonda.
Inyathelo lokuqala leloingqokelela yeesampulu, apho isitshixo kukuchonga "indawo yokuzimela" yentsholongwane. Ii-Parvovirus zihlala zixinene emathunjini, ngoko keiisampulu zendle okanye zokuhlanzazibekwe phambili; ii-coronavirus zisenokufihlakala kwindlela yokuphefumla, ngoko keiiswabhu zomqalazisetyenziswa rhoqo. Oku kufana nokufuna uvavanyo lwegazi xa uqhuba unxilile. Ukuba indawo engafanelekanga ithathwe iisampulu—njengokusebenzisa igazi ukufumanisa i-parvovirus emathunjini—kusenokwenzeka ukuba ufumanise ukuba kukho umntu onesifo esingapheliyo.
Emva kokuqokelelwa kwesampuli,ukukhutshwa kwe-nucleic acidkulandela oku, kujoliswe ekuhlukaniseni i-viral nucleic acid ecocekileyo kwiisampuli ezintsonkothileyo. Khumbula ukuba iisampuli ze-stool okanye ze-throat swab ziqulethe ukungcola okwahlukeneyo okufana namaqhekeza okutya kunye nenkunkuma yeseli. Iilabhoratri zisebenzisa ii-reagents ezikhethekileyo ukusebenza “njengezihluzo,” zisusa ezi ngcola zize zishiye kuphela i-viral nucleic acid.
Nangona kunjalo, ngenxaIintsholongwane zeRNAnjengeentsholongwane ze-coronavirus, "eyongezelelweyo"uguqulelo olubuyela umva"inyathelo liyafuneka. Oku kuguqula i-RNA engazinzile ibe yi-DNA enokubonwa ngakumbi, kuyilungiselela amanyathelo alandelayo.
Inyathelo lokugqibela leloUkwandiswa kwe-PCR, nto leyo ebandakanya ukwenza izigidi zeekopi ze-"genetic ID" yentsholongwane ukuze isixhobo sikwazi ukuyichonga ngokucacileyo. Iilabhoratri zisebenzisa itekhnoloji ye-quantitative PCR (qPCR), ziyila "ii-primer probes" ezikhethekileyo ezijolise kulandelelwano oluthile lwentsholongwane—ezifanaI-VP2 genekwii-parvovirus okanyeI-S genekwiintsholongwane ze-coronavirus. Ezi probes zisebenza njengemagnethi, zibopha ngokuchanekileyo kwi-nucleic acid ekujoliswe kuyo kwaye ziyiphindaphinde ngokukhawuleza. Nokuba isampulu ekuqaleni iqulethe iikopi ze-viral ezili-100 kuphela, ukwandiswa kwayo kunokuyandisa ukuya kwinqanaba elinokubonwa.
Emva koko esi sixhobo simisela iziphumo ngokusekelwe kwimiqondiso ye-fluorescent: ukukhanya kubonisa iziphumo ezilungileyo, ngelixa kungekho kukhanya kubonisa iziphumo ezimbi. Yonke le nkqubo ithatha malunga nemizuzu engama-40 ukuya kwengama-60.
Nangona kunjalo, abanini bezilwanyana zasekhaya banokudibana nemeko edidayo: abahlobo babo abanoboya babonisa iimpawu ezicacileyo ezifana nokuhlanza okanye urhudo, kodwa bavavanywe bengenayo i-nucleic acid; okanye ngokuchaseneyo, bavavanywa benayo kodwa babonakala benamandla kwaye bengabonakalisi zimpawu zokugula. Yintoni kanye kanye eyenzekayo? Ezi "zilumkiso zobuxoki" ziqhelekile, ngokuyintloko zivela kwizizathu ezininzi ezisisiseko.
Okokuqala, masithethe ngeemeko apho abantu babonisa iimpawu kodwa bafumanise ukuba abanazo.Oku kwenzeka rhoqo kuba intsholongwane idlala "ukufihla-ukufuna."
Enye imeko kukuba intsholongwane ayikafikeleli kumanqanaba abonakalayo kwindawo esingqongileyo. Umzekelo, kwiintsuku zokuqala ezi-3-5 emva kosulelo lwe-parvovirus, intsholongwane iphindaphinda kakhulu kwizicubu ze-lymphoid. Umthwalo wentsholongwane kwindle uhlala ungaphantsi komda wokufunyanwa weekopi ezili-100 ngempendulo nganye, nto leyo eyenza ukuba ingabonakali nokuba kuvavanyo lwe-PCR. Kufana nesela elingena nje endlwini ngaphambi kokuba lenze naluphi na ulwaphulo-mthetho—iikhamera zokhuseleko azikwazi ukubamba naziphi na iimpawu okwangoku.
Enye ingxaki eqhelekileyo ikwiisampuli.Ukuba iisampulu zendle zincinci kakhulu, ii-throat swabs azifikeleli kwi-mucosal lining, okanye iisampulu zishiywa kubushushu begumbi kangangeeyure ezibangela ukubola kwe-nucleic acid, uvavanyo aluphumeleli. Izibalo zelebhu zibonisa ukuba iisampulu ezingafanelekanga zinokubangela ngaphezulu kwe-30% yeziphumo ezingezizo ezilungileyo.
Ukongeza, ezi mpawu zisenokungabangelwa yi-parvovirus okanye ii-coronavirus konke konke.Ukuhlanza kunye norhudo lwezilwanyana zasekhaya kunokubangelwa yi-bacterial enteritis okanye usulelo lwe-parasites, ngelixa umkhuhlane kunye nokukhwehlela kunokubonisa i-mycoplasma pneumonia. Ekubeni izixhobo zovavanyo lwe-nucleic acid zenzelwe iintsholongwane ezithile, azinakwazi "ukuxilonga" ezinye izizathu.
Ngaphezu koko,utshintsho lwentsholongwane lunokwenza uvavanyo lungasebenzi.Umzekelo, utshintsho kwi-coronavirus S gene lunokuthintela iiprobe ekuyiboneni. Elinye ilabhoratri lifumanise ukuba i-5.3% yeendidi ezahlukeneyo zivelise i-false negatives, imeko efuna ukulandelelana kwe-whole-genome ukuze kuqinisekiswe.
Ngokuphathelele izilwanyana zasekhaya ezingenazo iimpawu ezifunyenwe zinentsholongwane, oku kudla ngokubonisa ukuba intsholongwane “ikwimeko yokungalali.”Ezinye izilwanyana zasekhaya “zithwala iintsholongwane.”Iintsholongwane ezifana ne-herpesvirus yekati okanye i-canine coronavirus zinokuhlala ixesha elide kwizilwanyana ezosulelekileyo. Logama nje inkqubo yokuzikhusela yomzimba wesilwanyana ihlala isempilweni, aziyi kubonakalisa zimpawu kodwa ziya kuqhubeka zikhupha intsholongwane—njengoko abanye abantu bethwala intsholongwane ye-hepatitis B ngaphandle kokuba nesi sifo.
Enye imeko ibandakanya ukuphazamiseka kweziphumo zovavanyo ngokugonya.Kwiintsuku ezisi-7-10 emva kokufumana ugonyo oluphilayo oluncitshisiweyo, intsholongwane yogonyo ingaphalala endle. Uvavanyo ngeli xesha lunokuvelisa isiphumo esingesiso. Ke ngoko, oogqirha bezilwanyana badla ngokucebisa ukuba bangavavanywa i-nucleic acid kwiiveki ezimbini emva kogonyo.
Ukongeza, iilabhoratri ngamanye amaxesha zifumana "iziganeko zokungcoliswa." Ukuba ii-aerosols ezivela kwisampulu yangaphambili ene-positive zingena kwisampulu entsha, oko kunokubangela ukuba isixhobo sichaze ngokungeyonyani njenge "positive." Nangona kunjalo, iilabhoratri ezithembekileyo zisebenzisa "ii-cleansing agents" kunye neeswabs ezikhethekileyo ukunciphisa lo mngcipheko wongcoliso, zinika abazali uxolo olukhulu lwengqondo xa bekhetha amaziko ovavanyo avunyiweyo.
Xa iziphumo zovavanyo zingahambelani neempawu zonyango, akukho mfuneko yokoyika. Iingcali zezilwanyana zihlala zicebisa la manyathelo alandelayo ukuze ziqinisekiswe ngakumbi.
Ekuqaleni,phinda uvavanye emva kwexesha elithileukubamba "inqanaba eliphezulu lokuphalala kwentsholongwane." Ukuba kurhanelwa kakhulu ukuba usulelo lwe-parvovirus okanye i-coronavirus luqhelekile, kuyacetyiswa ukuba kuphindwe kuvavanywe emva kweeyure ezingama-24-48, njengoko umthwalo wentsholongwane usenokuba ufikelele kumda wokufunyanwa ngelo xesha. Olunye uphando lubonise ukuba izinja ezifunyenwe zingenayo kwasekuqaleni kokugula zazinezinga le-82% lokubonakala zinesifo xa ziphinda zavavanywa emva kweeyure ezingama-48.
Isibini,dibanisa iindlela ezininzi zokuvavanya kunye novavanyo lweempawuukuze kuhlolwe ngokupheleleyo. Uvavanyo lwe-Nucleic acid lubona "usulelo lwangoku," ngelixa uvavanyo lwe-antibody lubona "usulelo lwangaphambili." Ukudibanisa oku kunye neempawu ezifana nobushushu bomzimba kunye nokubalwa kwegazi kunika umfanekiso opheleleyo. Umzekelo, inja ehlanzayo enovavanyo lwe-nucleic acid olune-negative kodwa ii-antibodies ezilungileyo zisekwisigaba sokuchacha, kunye nomthwalo wentsholongwane osele uncitshisiwe ukuya kumanqanaba angabonakaliyo.
Okokugqibela, ukukhetha indlela efanelekileyo yokuvavanya kubalulekile, njengoko uvavanyo lwe-antigen kunye novavanyo lwe-PCR zahluke kakhulu.
Uvavanyo lwe-antigen lunobuthathaka obuphantsi—umzekelo, ukufumanisa i-parvovirus kufuna amasuntswana e-viral ayi-10⁵ ukuze kuvele iziphumo ezilungileyo. Ngokwahlukileyo koko, uvavanyo lwe-PCR lunokufumanisa iikopi ze-viral ezimbalwa ukuya kwi-100, nto leyo enika ubuthathaka obuphezulu kakhulu. Ke ngoko, ukuba isilwanyana sasekhaya sibonisa iimpawu ezicacileyo kodwa sivavanywe singenayo kuvavanyo lwe-antigen, kubalulekile ukucebisa ugqirha wezilwanyana ukuba anyukele kuvavanyo lwe-PCR ukuze aphephe ukuxilongwa okungaphoswanga.
Uvavanyo lunemida; ukugweba ngokwesayensi kubaluleke ngakumbi.
Enyanisweni, uvavanyo lwe-nucleic acid aluyonto “yomlingo.” Lufuna iisampulu ezifanelekileyo, uvavanyo olukhawulezileyo, kunye nentsholongwane ukuze “isebenzisane” ngokungaguquguquki.
Xa iziphumo zovavanyo zingqubana neempawu, abanini bezilwanyana akufuneki boyike. Vumela oogqirha bezilwanyana benze isigqibo esipheleleyo ngokusekelwe kwimbali yezonyango zesilwanyana, iirekhodi zokugonywa, kunye neziphumo zovavanyo olulandelayo. Le ndlela iqinisekisa ukuxilongwa ngokuchanekileyo kunye nonyango lwabahlobo bethu abanoboya, ibanceda ukuba baphile ngokukhawuleza.
Ixesha lokuthumela: Novemba-06-2025
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