Qhov sib txawv tseem ceeb ntawm alpha thiab beta hemolytic Streptococci yog tias alpha hemolytic Streptococci yog ib pawg ntawm cov kab mob Streptococci uas tso tawm ib feem ntawm cov qe ntshav liab hauv cov ntshav agar media, thaum beta-hemolytic Streptococci yog ib pawg ntawm cov kab mob Streptococci. uas qhia ua tiav hemolysis ntawm cov qe ntshav liab hauv cov ntshav agar media.
Streptococcus yog ib hom kab mob gram-zoo coccus lossis cov kab mob kheej kheej. Cov kab mob no muaj nyob hauv tsev neeg Streptococaceae nyob rau hauv qhov kev txiav txim Lactobacillales thiab hauv phylum Firmicutes. Feem ntau cov kab mob Streptococci yog oxidase tsis zoo, catalase negative, thiab facultative anaerobes. Ntxiv mus, lawv feem ntau yog cov kab mob pathogenic uas ua rau ntau yam kab mob hauv tib neeg. Cov hom ntawm genus Streptococcus raug cais raws li lawv cov hemolytic (cov qe ntshav liab tawg) cov khoom hauv cov ntshav agar. Raws li hemolytic zog, muaj peb pawg ntawm Streptococci kab mob: alpha, beta, thiab gamma hemolytic. Yog li, alpha thiab beta hemolytic Streptococci yog ob pawg ntawm cov kab mob Streptococci raws li cov khoom hemolytic.
Alpha Hemolytic Streptococci yog dab tsi?
Alpha hemolytic Streptococci yog ib pawg ntawm cov kab mob Streptococci uas qhia ib nrab hemolysis ntawm cov qe ntshav liab hauv cov ntshav agar media. Hemolysis yog kev tawg ntawm cov qe ntshav liab. Lub peev xwm ntawm cov kab mob hauv cov kab mob txhawm rau ua rau hemolysis hauv xov xwm xws li ntshav agar yog siv los faib cov kab mob xws li Streptococci. Thaum alpha hemolysis tshwm sim, cov ntshav agar nruab nrab cov ntsiab lus nyob rau hauv cov kab mob colony yog tsaus thiab ntsuab. Qhov no yog vim alpha hemolytic hom ua rau oxidation ntawm hlau nyob rau hauv hemoglobin molecules nyob rau hauv cov ntshav liab. Yog li, nws muab cov xim ntsuab ntawm cov ntshav agar. Alpha hemolysis tseem hu ua tsis tiav lossis ib nrab hemolysis vim tias cov cell membranes ntawm cov qe ntshav liab tseem tshuav tsis zoo tom qab cov txheej txheem hemolysis.
Daim duab 01: Alpha Hemolytic Streptococci
Ib txwm, Streptococcus pneumonia thiab ib pawg ntawm qhov ncauj Streptococci (Streptococcus viridians) tso tawm cov khoom no alpha hemolytic. S. pneumonia yog qhov ua rau muaj kab mob ntsws. S. pneumonia tuaj yeem ua rau otitis media, sinusitis, meningitis, thiab peritonitis. S. viridians feem ntau commensal tab sis tuaj yeem ua rau kab mob. Thaum muaj kab mob, S. viridians ua rau sepsis thiab mob ntsws.
YDab tsi yog Beta Hemolytic Streptococci?
Beta hemolytic Streptococci yog ib pawg ntawm cov kab mob Streptococci uas qhia ua tiav hemolysis hauv cov qe ntshav liab hauv cov ntshav agar media. Beta hemolytic Streptococci ua kom tiav lysis ntawm cov qe ntshav liab nyob rau hauv cov ntshav agar media nyob ib ncig ntawm thiab nyob rau hauv cov kab mob colony. Qhov chaw hauv xov xwm tshwm sim daj daj thiab pob tshab tom qab hemolysis. Qhov ua tiav hemolysis yog vim muaj exotoxin uas yog tsim los ntawm cov kab mob hu ua streptolysin. Muaj ob hom streptolysins: streptolysin O (SLO) thiab streptolysin S (SLS). SLO yog zais los ntawm Pawg A Streptococcus (GAS) thiab Streptococcus dysgalactiae. SLS tsuas yog zais los ntawm Pawg A Streptococcus.
Daim duab 02: Beta Hemolytic Streptococci
Tsis tas li ntawd, Streptococcus pyogenes lossis Pawg A beta hemolytic Streptococcus (GAS) qhia txog beta hemolysis. Qee lub sij hawm, cov kab mob beta hemolytic tsis muaj zog (Pawg B Streptococcus xws li Streptococcus agalactiae) ua rau mob hemolysis ntawm cov qe ntshav liab thaum lawv loj hlob ua ke nrog cov kab mob Staphylococcus. Qhov no hu ua CAMP test.
Dab tsi zoo sib xws ntawm Alpha thiab Beta Hemolytic Streptococc i?
- Streptococci yog ob pawg ntawm Streptococci kab mob raws li cov khoom hemolytic.
- Cov kab mob ntawm ob pawg yog cais raws li genus Streptococcus, tsev neeg Streptococaceae, xaj Lactobacillales, thiab phylum Firmicutes.
- Cov kab mob ntawm ob pawg qhia hemolysis ntawm cov qe ntshav liab hauv cov ntshav agar daim hlau.
- Lawv muaj cov tshuaj hemolysins.
- Lawv yog gram-positive, oxidase negative, catalase negative, thiab facultative anaerobes.
Qhov txawv ntawm Alpha thiab Beta Hemolytic Streptococc yog dab tsi?
Alpha hemolytic Streptococci yog ib pawg ntawm cov kab mob Streptococci uas qhia txog ib feem ntawm hemolysis ntawm cov qe ntshav liab hauv cov ntshav agar media, thaum beta-hemolytic Streptococci yog ib pawg ntawm Streptococci kab mob uas qhia tag nrho hemolysis ntawm cov qe ntshav liab hauv cov ntshav. agar media. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm alpha thiab beta hemolytic Streptococci. Tsis tas li ntawd, thaj chaw hauv xov xwm zoo li ntsuab xim tom qab hemolysis los ntawm alpha-hemolytic Streptococci. Ntawm qhov tod tes, thaj chaw hauv xov xwm tshwm sim xim daj thiab pob tshab tom qab hemolysis los ntawm beta-hemolytic Streptococci.
Cov ntawv qhia hauv qab no nthuav tawm qhov sib txawv ntawm alpha thiab beta hemolytic Streptococci hauv daim ntawv qhia rau ib sab ntawm kev sib piv.
Summary – Alpha vs Beta Hemolytic Streptococci
Alpha thiab beta hemolytic Streptococci yog ob pawg ntawm Streptococci kab mob raws li cov khoom hemolytic. Alpha hemolytic Streptococci tso saib ib nrab hemolysis ntawm cov qe ntshav liab hauv cov ntshav agar media, thaum beta-hemolytic Streptococci tso saib ua tiav hemolysis ntawm cov qe ntshav liab hauv cov ntshav agar media. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm alpha thiab beta hemolytic Streptococci.
