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Video: Dab tsi ua rau lub ntsej muag ntsuab ntawm EMB phaj?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Nyob EMB yog tias E. coli loj tuaj nws yuav muab cov xim sib txawv ntsuab ntsuab (vim yog cov khoom sib txawv ntawm cov xim, E. coli txav siv flagella, thiab muaj zog acid kawg cov khoom ntawm fermentation).
Hauv qhov no, EMB phaj ntsuas rau dab tsi?
Eosin methylene xiav agar ( EMB ) yog kev xaiv thiab sib txawv nruab nrab siv los cais cov quav quav quav. Eosin Y thiab methylene xiav yog pH qhia cov xim zas xim uas sib xyaw ua kom cov xim daj tsaus ntuj los nag ntawm pH qis; lawv kuj ua haujlwm los tiv thaiv kev loj hlob ntawm feem ntau cov kab mob Gram zoo.
Ib tus kuj yuav nug, dab tsi ua rau EMB Agar sib txawv? Eosin Methylene Xiav (los yog EMB ) Agar yog Xaiv & Sib txawv Nruab nrab. Selective thiab sib txawv cov xwm txheej yog vim cov xim Eosin Y thiab Methylene Blue, thiab suab thaj lactose thiab sucrose hauv nruab nrab. Nws yog Kev Xaiv vim nws txhawb qee cov kab mob kom loj hlob thaum tiv thaiv lwm tus.
Cov lus nug tseem yog, Cov kab mob dab tsi loj hlob ntawm EMB?
Qee qhov txawv ntawm Salmonella thiab Shigella yuav tsis loj hlob ntawm EMB Agar. Qee cov kab mob gram-positive, xws li tus kab mob enterococci , staphylococci, thiab cov poov xab yuav loj hlob ntawm qhov nruab nrab no thiab feem ntau tsim cov ntsiab lus tseem ceeb. Cov tsis muaj kab mob, tsis muaj cov kab mob lactose-fermenting yuav loj hlob ntawm qhov nruab nrab no.
Puas yog E coli loj hlob ntawm EMB agar?
Tsuas yog cov kab mob gram-negative loj hlob ntawm EMB agar . Cov kab mob gram-positive raug txwv los ntawm cov dyes eosin thiab methylene blue ntxiv rau agar . Vim tias muaj zog fermentation ntawm lactose thiab tsim tawm ntau ntau ntawm cov kua qaub, cov cheeb tsam ntawm Escherichia coli cov pom tsaus nti thiab xiav-dub nrog cov xim ntsuab xim hlau.
Pom zoo:
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