Cov kab mob nyob ib puag ncig peb txhua qhov chaw thiab nyob hauv peb lub cev, ua ib feem ntawm nws thiab lub ntiaj teb tag nrho. Txawm li cas los xij, tsis yog txhua tus ntawm lawv muaj kev phom sij rau peb txoj kev noj qab haus huv; ntawm qhov tsis sib xws, cov kab mob uas tsim cov microflora ib txwm muaj ntawm tib neeg lub cev tiv thaiv kab mob txawv teb chaws thiab tiv thaiv kev kis kab mob. Tsis tas li ntawd, ib qho tseem ceeb ntawm kev tiv thaiv yog lub cev tiv thaiv kab mob, txawm li cas los xij, thaum nws tsis muaj zog, txawm tias muaj kab mob tuaj yeem ua rau muaj kab mob. Ib qho ntawm lawv cov neeg sawv cev zoo tshaj plaws yog streptococcus viridans, uas yuav tau tham.
Cov ntaub ntawv tseem ceeb
Txwv tsis pub hu ua "green streptococcus", nws yog ib txwm nyob ntawm tib neeg lub qhov ncauj kab noj hniav, qhov chaw nws nyob ntawm cov hniav thiab cov pos hniav thiab feem ntau ua rau caries. Qhov no yog vim cov qauv ntawm streptococcus viridans muaj cov protein tshwj xeeb uas tuaj yeem khi cov qaub ncaug thiab yog li txuas rau cov hniav. Thiab thaum sucrase nkag nrog zaub mov, nws hloov mus rau hauv lactic acid, corroding enamel. Nws tau txais nws lub npe nthuav vim nws tau bacteriologically sown rauCov kab mob no tsim ib cheeb tsam ntsuab ntawm hemolysis nyob ib ncig ntawm lawv cov colony nyob rau hauv cov ntshav agar nruab nrab. Txawm li cas los xij, muaj lwm pawg ntawm lawv, cov no yog hemolytic streptococci (ua tiav hemolyze ib puag ncig) thiab tsis-hemolytic (tsis muaj hemolytic enzymes). Hauv kev sib piv nrog thawj streptococcus pab pawg viridans tsis yog li ntawd txaus ntshai rau tib neeg lub cev thiab muaj ntau yam tsis zoo. Txawm li cas los xij, thaum kev tiv thaiv tsis muaj zog, lawv nquag sib txuas thiab muaj cov kab mob pathogenic, ua rau muaj kev pheej hmoo kis mob, thiab tsis yog ib txwm mob me.
Microbiology
Tam sim no cia peb los saib seb dab tsi streptococcus viridans yog dab tsi. Yog hais tias peb tham txog cov kab mob no los ntawm ib tug microbiological point of view, ces lawv yog spherical los yog ovoid gram-zoo cocci uas tsis tsim spores. Lawv zwm rau pawg ntawm facultative anaerobes thiab nyob rau tsev neeg Streptococaceae. Yuav kom paub seb tus kab mob streptococcus viridans zoo li cas, nws yog dab tsi, tsuas yog saib los ntawm lub teeb pom kev zoo. Yog li koj tuaj yeem pom tias feem ntau lawv tau npaj ua khub lossis sib sau ua ke hauv chains, tab sis tib lub sijhawm tseem nyob twj ywm. Lawv qhov kev phom sij rau peb txoj kev tiv thaiv yog nyob rau hauv qhov tseeb tias lawv muaj peev xwm tsim ib lub tshuaj ntsiav uas tiv thaiv lawv los ntawm phagocytosis los ntawm cov qe ntshav tshwj xeeb, thiab tseem tuaj yeem hloov mus rau hauv daim ntawv L-forms, yog li hloov pauv, thiab yog li ntawd tuaj yeem nkaum ntawm cov khoom ntawm peb. tiv thaiv kab mob ntev.
Inoculation thiab virulence
Cov khoom noj khoom haus ntawm cov kab mob no, tsis zoo li staphylococci, yog qhov nyuaj heev. Lawv loj hlob zoo tsuas yog nyob rau hauv cov xov xwm nyob rau hauv kev npaj ntawm tag nrho cov ntshav los yog cov ntshav tau siv, thiab lawv kuj xav tau cov carbohydrates rau kev noj haus. Tias yog vim li cas ntshav agar feem ntau yog siv rau kab lis kev cai bacteriological ntawm ntsuab streptococci. Nyob rau hauv ib puag ncig sab nraud, lawv ruaj khov heev, yog li, piv txwv li, ntawm cov khoom siv biomaterials qhuav (ntshav, kua paug, hnoos qeev), lawv tuaj yeem ua haujlwm tau ntau lub hlis. Thaum pasteurization, tshuaj tua kab mob, lawv tuag, tab sis tsis tam sim ntawd. Yog li, thaum lawv tau rhuab mus rau qhov kub ntawm 60 degrees Celsius, lawv txoj kev tuag tsuas yog tom qab ib nrab teev, thiab thaum siv des. nyiaj - hauv 15 feeb.
Kab mob kis
Qhov tseeb tias ntawm cov microflora ib txwm ntawm tib neeg lub cev, nrog rau ntau cov kab mob, streptococcus viridans kuj yog tus qauv. Txawm li cas los xij, qhov no tsuas yog siv rau qee qhov ntawm nws cov kab mob, thiab nws tuaj yeem rov ua dua los ntawm cov neeg mob, uas yog, cov neeg nqa khoom ntawm streptococci lossis twb mob nrog ib qho ntawm ntau hom kab mob (tonsillitis, scarlet fever, pneumonia, thiab lwm yam).. Nyob rau tib lub sijhawm, cov neeg mob uas muaj qhov txhab ntawm qhov ua pa sab sauv yog qhov txaus ntshai tshaj plaws, txij li lawv tso tawm ntau dua streptococci rau hauv ib puag ncig. Li no txoj hauv kev tseem ceeb ntawm kev kis kab mob yog huab cua, uas yog, thaum hais lus, txham, hnoos, hnia, thiab lwm yam.; Qee zaum, kev noj zaub mov (nrog zaub mov) thiab kev sib cuag (siv tes) kuj ua tau. Yog li, nws paub tias ntau pawg A streptococcituaj yeem khaws lawv cov khoom tsis zoo rau lub sijhawm ntev thaum lawv tau txais cov khoom lag luam, qhov tseeb, ib puag ncig zoo rau lawv. Cov no suav nrog qe, mis nyuj, nqaij npua thiab ntses.
Kev nyuaj siab
Cov kab mob loj tshaj plaws tshwm sim los ntawm viridescent thiab non-hemolytic streptococci yog kab mob endocarditis. Qhov tseeb yog hais tias thaum lub mucous daim nyias nyias ntawm lub qhov ncauj kab noj hniav (cov pos hniav, tus nplaig) raug mob nrog ib tug txhuam hniav, txhuam hniav los yog nrog stomatitis, streptococcus viridans nkag mus rau hauv lub zos, thiab ces lub systemic ncig. Thaum lawv ncav cuag lub siab, lawv muaj peev xwm txuas mus rau thiab colonize li qub. Qhov no yog li cas tus kab mob no tshwm sim. Nws pib, raws li txoj cai, nrog kev tshwm sim dav dav: qaug zog, malaise, kub taub hau. Qhov no feem ntau yog vim qhov tseeb tias nws feem ntau tshwm sim los ntawm cov kab mob me me lossis me me.
Clinic and outcomes
Yog tias cov kab mob pathogenic heev dhau los ua tus kab mob endocarditis, ces tus kab mob pib mob hnyav thiab nrog rau qhov kub thiab txias, txog plaub caug degrees. Nyob rau tib lub sijhawm, mob leeg thiab pob qij txha tshwm sim nyob rau hauv tib lub sijhawm, thiab lub plawv yws yws tau hnov ntawm auscultation. Qhov txaus ntshai ntawm tus kab mob no nyob rau hauv kev puas tsuaj ntawm endocardium, uas yog, deformation ntawm li qub nrog cov tsos ntawm cov kab mob nroj tsuag ntawm lawv. Nrog lawv cov exfoliation, microbial vascular embolism tsim, ua rau lub plawv nres thiab mob stroke. Tsis tas li ntawd, aneurysms ntawm cov hlab ntsha loj, lub hlwb abscesses, meningitis, encephalopathy thiab plawv tsis ua hauj lwm tuaj yeem tsim.
