Kev xeem MR zoo txhais li cas?

2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44

MR Positive : Thaum cov kab lis kev cai nruab nrab tig liab tom qab ntxiv ntawm methyl liab , vim pH ntawm lossis qis dua 4.4 los ntawm fermentation ntawm qabzib. MR Negative : Thaum kab lis kev cai nruab nrab tseem daj, uas tshwm sim thaum cov kua qaub tsawg dua (pH siab dua) los ntawm fermentation ntawm qabzib.

Yog li ntawd, qhov kev xeem VP zoo txhais li cas?

r/ lub VP yog a xeem siv los txheeb xyuas acetoin hauv kab lis kev cai kab mob. Cov xeem tau ua tiav los ntawm kev ntxiv alpha-naphthol thiab potassium hydroxide rau Voges-Proskauer broth uas tau txhaj tshuaj nrog cov kab mob. Ib cov xim liab liab qhia tias yog zoo tshwm sim, thaum xim daj-xim av qhia qhov tsis zoo.

Tsis tas li ntawd, tus kab mob puas tuaj yeem yog MR thiab VP zoo? Enterobacter hafnia thiab Proteus mirabilis yog cov piv txwv ntawm cov kab mob uas yog ob tug MR- thiab VP - zoo , txawm hais tias VP cov tshuaj tiv thaiv yuav raug ncua. Lub sijhawm incubation txog li 5 hnub yuav tsim nyog rau qhov kev sim tshuaj methyl liab thiab mus txog 10 hnub rau kev xeem Voges-Proskauer.

Tom qab ntawd, ib tus tuaj yeem nug, Mr xeem siv dab tsi?

Peb Methyl Liab ( MR ) Reagent yog ib qho kev daws teeb meem siv los qhia qhov pH ntawm cov kua txiv kab lis kev cai hauv methyl liab kuaj . Cov methyl liab kuaj yog siv txhawm rau txheeb xyuas lub peev xwm ntawm lub cev los tsim thiab tswj cov kua qaub kawg ntawm cov piam thaj fermentation.

Vim li cas qhov kev xeem IMViC thiaj li muaj nuj nqis?

Thaum siv ib leeg, lub IMViC xeem tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau kev sib txawv ntawm Escherichia coli, Enterobacter aerogenes, Enterobacter cloacae, thiab Klebsiella pneumoniae (txawm hais tias colonial morphology thiab muaj cov tshuaj ntsiav kuj siv tau los sib txawv Klebsiella).