Mavhairasi zvinhu zvinotapurirana zvisingaonekwe zvakanaka zvinongogona kuberekana mukati memasero ezvisikwa zvipenyu. Mavhairasi anozivikanwa sechinhu chakakosha muzvinhu zvipenyu zvePasi, ane mabasa akasiyana-siyana, kubva pazvinhu zvinokonzera zvirwere kusvika kuzvinhu zvinoshandiswa mukutsvagisa kwesainzi uye biotechnology.
Tsanangudzo uye Hunhu hweMavhairasi
Muchimiro, mavhairasi ane nucleic acid (DNA kana RNA) yakakomberedzwa neprotein coat inonzi capsid. Mamwe mavhairasi ane imwe layer inonzi envelope, yakagadzirwa nemafuta nemapuroteni. Mavhairasi haana organelles kana mamwe maumbirwo emasero anodiwa kuti metabolism uye kubereka zvive zvakazvimirira. Pane kudaro, anovimba nemasero emuviri kuti aite izvi.
Mavhairasi madiki zvikuru, anotangira pa20 kusvika 300 nanometers, zvichiita kuti ave madiki pane mabhakitiriya nemamwe masero akawanda. Kukura kwawo kudiki kunoabvumira kupinda mumasero emuviri kuburikidza nenzira dzakasiyana-siyana.
Kupatsanurwa kweMavhairasi
Mavhairasi anorongwa zvichienderana nezvinodiwa zvakasiyana-siyana, kusanganisira rudzi rwe nucleic acid yaari (DNA kana RNA), chimiro nehukuru hwe capsid yawo, kuvapo kana kusavapo kwe envelopu, uye nzira yekuberekana kwayo. Kurongwa uku kunobatsira masayendisiti kuziva nekudzidza mavhairasi uye kugadzira nzira dzekudzora hutachiona hwaanokonzera.
Basa reMavhairasi muZvirwere
Rimwe remabasa anozivikanwa zvikuru emavhairasi nderekukonzera zvirwere. Mavhairasi anogona kutapurirana nemarudzi akasiyana-siyana ezvisikwa, kusanganisira vanhu, mhuka, zvirimwa, uye kunyange mabhakitiriya (anonzi bacteriophages). Zvimwe zvirwere zvinokonzerwa nemavhairasi zvinosanganisira furuwenza, HIV/AIDS, hepatitis, dengue fever, uye COVID-19.
Kana mavhairasi akapinda mumasero emuviri, anoshandisa michina yemasero emuviri kuti azvibereke. Maitiro aya anowanzo kuvadza kana kuuraya masero emuviri, izvo zvinogona kukonzera zviratidzo zvechirwere. Semuenzaniso, hutachiona hwefuruwenza hunopinda mumasero ari muhuro, zvichikonzera zviratidzo zvakaita sefivha, kukosora, uye kurwadziwa pahuro. HIV inorwisa masoja emuviri, zvichiita kuti vanorwara vave panjodzi yekubatwa nehutachiona nezvimwe zvirwere.
Mavhairasi muEcosystems uye Evolution
Kupfuura basa rawo semushonga wezvirwere, mavhairasi anoitawo basa rakakosha mukushanduka-shanduka kwezvakatipoteredza nekushanduka-shanduka kwezvinhu. Mavhairasi anogona kukanganisa huwandu hwevanhu nenharaunda yezvisikwa uye kubatsira mukutamisa majini pakati pemarudzi.
Munzvimbo dzinowanikwa hutachiona, mavhairasi anowanzo dzora huwandu hwehutachiona kuburikidza nehutachiona hwe lytic, uko sero remugadziri wehutachiona rinoparadzwa mushure mekunge hutachiona hwawedzera. Izvi zvinogona kubatsira kuchengetedza huwandu hwehutachiona uye kudzivirira kutonga kwemamwe marudzi.
Mavhairasi anoitawo basa mukushanduka-shanduka kwemasero kuburikidza nekuchinjisa majini akachinjika, nzira iyo majini anotamiswa kubva kune chimwe chinhu chipenyu kuenda kune chimwe pasina kuberekana pabonde. Mavhairasi anogona kutakura majini kubva kune chimwe chinhu chipenyu kuenda kune chimwe, izvo zvinogona kutungamira mukusiyana kwemajini uye kushanduka kwemarudzi matsva. Chiitiko ichi chinoonekwa mumabhakitiriya, uko mabhakitiriya anogona kutamisa majini anodzivirira mabhakitiriya pakati pemabhakitiriya, zvichikurumidzisa kushanduka kwekusakwanisa mabhakitiriya.
Mabhenefiti eMavhairasi muSainzi neTekinoroji
Kupfuura basa rawo muzvinhu zvipenyu nekushanduka-shanduka, mavhairasi anewo mabhenefiti makuru musainzi netekinoroji. Mukutsvagisa kwezvekurapa, mavhairasi anoshandiswa sezvishandiso zvekudzidza mashandiro emajini uye mashandiro ezvirwere. Semuenzaniso, mavhairasi ekare akadai seHIV akashandiswa kunzwisisa kurongeka kwemajini uye kutenderera kwemasero.
Mavhairasi anoitawo basa guru mu biotechnology, kunyanya mukurapa majini uye kugadzirwa kwejekiseni. Kurapa majini kunosanganisira kushandisa mavhairasi akagadziriswa kuendesa majini kumasero emurwere. Mavhairasi anogona kugadzirwa kuti abvise majini anokonzera zvirwere zvemajini kana kuti aunze majini anobatsira kurwisa zvirwere izvi. Semuenzaniso, kurapwa kwemajini kunoshandisa mavhairasi akabatana neadeno (AAVs) kurapa zvirwere zvemajini zvakaita seDuchenne muscular dystrophy uye hemophilia.
Mukugadzirwa kwemishonga inorwisa majekiseni, mavhairasi anowanzo shandiswa senzira dzekugadzira mishonga inorwisa majekiseni. Mamwe majekiseni anobudirira zvikuru, akadai semushonga weporiyo nemushonga wehepatitis B, akagadzirwa achishandisa mavhairasi asina simba kana asina kushanda. Mishonga iyi inosimudzira immune system kuti igadzire mhinduro yemuviri isina kukonzera chirwere.
Kufambira Mberi Munguva Pfupi Iri MuVirology
Sainzi yehutachiona iri kuramba ichichinja pamwe chete nekufambira mberi kwetekinoroji neruzivo rwesainzi. Imwe yekuvandudza kwazvino ndeyekushandiswa kwetekinoroji yeCRISPR-Cas9 kugadzirisa majini emavhairasi nemasero emugadziri. Iyi tekinoroji inobvumira masayendisiti kucheka nekutsiva zvikamu zveDNA, zvichivhura mikana mitsva yekurapa majini nekutsvaga zvirwere.
Uyezve, denda reCOVID-19 rakakurudzira kutsvagurudza kwakadzama mukugadzirwa kwemishonga yekudzivirira majekiseni uye mishonga yekudzivirira mavhairasi. Mishonga yekudzivirira mRNA, yakaita seyakagadzirwa nePfizer-BioNTech neModerna, ibudiriro huru dzinoshandisa tekinoroji yemajini kugadzira mhinduro yakasimba uye inoshanda yekudzivirira majekiseni. Tsvagiridzo iyi yakavandudzawo kunzwisisa kwedu mashandiro ehutachiona uye kushanda kwahwo nemuviri wemuviri.
Matambudziko muKudzora Mavhairasi
Pasinei nekufambira mberi kukuru, kudzora hutachiona kuchiri dambudziko guru. Dambudziko guru nderekukura nekukurumidza kwehutachiona, izvo zvinogona kugadzira mhando itsva dzinotapurirana kana dzisingadi majekiseni nemishonga. Kuchinja uku kunogona kuitika zvisina tsarukano panguva yekuberekana kwehutachiona uye kunogona kukurudzirwa kuburikidza nekumanikidzwa kwakasiyana, senge kushandisa mishonga inorwisa mavhairasi kana kubaiwa nhomba.
Uyezve, mavhairasi anogona kutapurira marudzi akasiyana-siyana, akadai sefuruwenza nemakoronavirus, ane njodzi huru kuhutano hwevanhu nemhuka. Kutapurirana kwemavhairasi pakati pemarudzi (zoonosis) kunogona kutungamira mukupararira kwezvirwere zvitsva, sezvinoonekwa mudenda reCOVID-19, iro rinobva kuhutachiona hweSARS-CoV-2.
Kugadzirisa matambudziko aya kunoda nzira dzakasiyana-siyana dzinosanganisira masayendisiti, vashandi vehutano, hurumende, neveruzhinji. Nzira iyi inosanganisira kuongorora zvirwere, kugadzira majekiseni matsva nemishonga, uye kushandiswa kwemitemo yehutano hweveruzhinji inoshanda.
Mhedziso
Mavhairasi zvinhu zvinotapukira zvine basa rakasiyana-siyana muzvinhu zvipenyu nesainzi. Kunyange zvazvo zvichizivikanwa sezvikonzero zvezvirwere, mavhairasi anobatsirawo mukushanduka-shanduka kwezvinhu uye ane mashandisirwo akakosha mukutsvagisa ne biotechnology. Kufambira mberi mu virology ne tekinoroji kunopa tariro itsva mukudzora nekushandisa mavhairasi kuti vanhu vabatsirwe. Zvisinei, matambudziko ekudzora mavhairasi anoda kushandira pamwe kwenyika dzese uye nzira itsva dzekuchengetedza hutano hwevanhu nezvakatipoteredza.
