Streptococcus spp
Streptococcus spp yog ib chav kawm ntawm cov kab mob Gram-zoo uas feem ntau muaj nyob rau hauv ib puag ncig ntuj thiab tseem tuaj yeem pom nyob rau hauv qhov ncauj kab noj hniav, kab mob ua pa, plab hnyuv, thiab kev tsim tawm ntawm tib neeg thiab tsiaj txhu. Hauv cov khoom siv probiotic, Streptococcus feem ntau yog siv los ua ib qho ntawm cov khoom xyaw tseem ceeb, thiab nws cov teebmeem muaj xws li kev tiv thaiv txoj hnyuv, txhim kho kev tiv thaiv, thiab tiv thaiv kab mob.
Nov yog qee qhov kev faib tawm hauv cov kab mob Streptococcus spp:
Streptococcus salivarius : Qhov no yog ib hom kab mob ntawm qhov ncauj uas muaj dav nyob rau hauv qhov ncauj kab noj hniav. Nws tuaj yeem pab tswj qhov ncauj noj qab haus huv thiab tiv thaiv cov teeb meem xws li qhov ncauj kab mob thiab ua pa phem. Tsis tas li ntawd, qhov ncauj streptococci tuaj yeem ncav cuag lub plab los ntawm qhov ncauj, ua rau muaj kev cuam tshuam zoo rau lub plab noj qab haus huv.
Enterococcus (Streptococcus faecium): Qhov no yog ib hom kab mob plab hnyuv, uas tuaj yeem pab tswj txoj hnyuv, txhim kho kev tiv thaiv kab mob, txhawb kev zom zaub mov thiab kev nqus, thiab lwm yam.
Streptococcus lactis: Qhov no yog ib pawg ntawm cov kab mob dav dav pom hauv cov khoom noj fermented. Nws pab kev zom zaub mov, txhawb lub plab noj qab haus huv, txhawb kev tiv thaiv kab mob, thiab tiv thaiv kab mob, thiab lwm yam.
Streptococcus thermophilus yog muab los ntawm cov khoom noj siv mis. Nws yog cov kab mob aerobic Gram-zoo uas tsim cov saw ntev ntev li ntawm 0.7 rau 0.9 microns nrog ob lub oval-shaped cocci ua ib khub. Streptococcus thermophilus yog suav tias yog "feem ntau lees paub tias muaj kev nyab xeeb (GRAS)" thiab yog ib qho tseem ceeb ntawm cov kab mob lactic acid, uas feem ntau yog siv los ua cov kab mob ib leeg lossis sib xyaw nrog lwm cov kab mob Streptococcus thermophilus lossis lwm yam kab mob, thiab tau siv dav hauv kev tsim cov fermented mis nyuj khoom nruab nrab.
Raws li thaum ntxov xyoo 1907, Streptococcus thermophilus tau paub los txhawb kev noj qab haus huv hauv plab, thiab tsis ntev nws tau siv los tsim cov kua mis nyeem qaub thiab kuj tau siv los tsim ntau yam khoom cheese. Lub luag haujlwm tseem ceeb ntawm Streptococcus thermophilus hauv cov mis nyuj fermentation yog tsim cov kua qaub sai. Streptococcus thermophilus tseem tuaj yeem tsim cov exopolysaccharides, uas tuaj yeem muab cov khoom noj siv mis fermented kom khov, stringy kev ntxhib los mos thiab cov yam ntxwv rheological, thiab muaj cov dej tuav cov nyhuv uas tuaj yeem tiv thaiv yogurt los ntawm syneresis.
Lwm cov kev tshawb fawb tau tshaj tawm lwm yam probiotic yam ntxwv ntawm S. thermophilus (xws li kev tawg ntawm cov kua tsib ntsev, hydrophobicity, thiab -galactosidase kev ua ub no) thiab tiv thaiv kab mob lom (kua kua txiv thiab kua tsib ntsev).
Streptococcus thermophilus kuj muaj qee yam kev ua ub no, xws li kev tsim cov exopolysaccharides, bacteriocins, thiab cov vitamins. Tsis tas li ntawd, Streptococcus thermophilus kuj tseem siv tau los ua cov kab mob uas muaj txiaj ntsig zoo, thiab cov kev sim tau ua pov thawj tias nws muaj kev cuam tshuam rau kev noj qab haus huv, kev thauj mus los, thiab qee yam kab mob hauv plab adhesion.
Cov txiaj ntsig ntawm Streptococcus thermophilus
No. 1 Txhim kho plab hnyuv microenvironment
Cov menyuam yaus txo cov plab hnyuv pH, txhawb plab hnyuv peristalsis los tiv thaiv kev colonization ntawm cov kab mob pathogenic thiab tso cov kab mob bacteriocins los tiv thaiv kev loj hlob ntawm cov kab mob pathogenic.
No. 2 Tswj cov ntshav siab
Nws inhibits cov haujlwm ntawm cov cholesterol synthase, thiab txo cov roj cholesterol cov ntsiab lus hauv cov ntshav, thiab nws cov kab mob fermentation khoom tuaj yeem tswj thiab tswj ntshav siab.
No. 3 Anti-cancer nyhuv
Cov khoom tsim los ntawm polysaccharides, bacteriocin, lactic acid, thiab lwm yam muaj kev tiv thaiv qog nqaij hlav, thiab tiv thaiv qhov tshwm sim ntawm cov qog los ntawm kev ua kom lub cev tiv thaiv kab mob thiab inhibiting cell mutation.
No. 4 Ncua kev laus
Kev tsim cov superoxide dismutase (SOD) tuaj yeem tshem tawm cov superoxide anion dawb radicals uas tsim tawm thaum lub sijhawm metabolism hauv lub cev thiab ncua kev laus.
No. 5 Relieves Lactose Intolerance
Lub degradation ntawm lactose yuav tsum muaj ib tug tshwj xeeb enzyme hu ua -galactosidase. Cov neeg uas muaj lactose intolerant yog tsis muaj cov enzyme no. Streptococcus thermophilus yog cov kab mob uas tsim -galactosidase, yog li nws tuaj yeem pab zom cov lactose.
No. 6 Kev ua siab ntev rau gastric acid thiab bile ntsev
Cov ciaj sia taus ntawm Streptococcus thermophilus nyob rau hauv acidic tov ntawm PH=6.8 yog 100 feem pua, qhov ciaj sia taus tus nqi nyob rau hauv acidic tov ntawm PH=4 yog li ntawm 75 feem pua, thiab cov ciaj sia taus tus nqi nyob rau hauv cov acidic tov. ntawm PH=3 yog li 70 feem pua.
Streptococcus thermophilus tuaj yeem muaj sia nyob hauv cov kua tsib ntau dua, yog li nws yuav tsum muaj peev xwm ncav cuag txoj hnyuv me hauv vivo yam tsis muaj kev puas tsuaj los ntawm cov kua tsib.