E. coli yog facultative anaerobic, Gram-negative bacilli uas yuav ferment lactose los tsim hydrogen sulfide. Txog li 10% ntawm cov kev sib cais muaj keeb kwm tau tshaj tawm tias qeeb lossis tsis yog lactose fermenting, txawm tias qhov sib txawv ntawm qhov chaw kho mob tsis paub.
E. coli ferment yog dab tsi?
E. coli ua cov suab thaj raws li cov kua qaub fermentation uas ua rau muaj kev sib xyaw ntawm cov khoom kawg uas tuaj yeem suav nrog lactate, acetate, ethanol, succinate, formate, carbon dioxide, thiab hydrogen … coli kuj suav nrog kev ua pa anaerobic. tshuaj tiv thaiv kom txo tau fumarate rau succinate.
YPuas E. coli ferment lactose thiab sucrose?
Vim tsim cov kua qaub thaum fermentation ntawm lactose, sucrose thiab qabzib, pH feem ntau poob qis.… coli qhia tau hais tias cov tshuaj tiv thaiv acid (daj) thiab cov roj tsim nyob rau hauv lub pob tw ntawm lub raj kuaj thiab cov tshuaj tiv thaiv acid (daj) ntawm qhov chaw slant. Kev piav qhia ntawm cov tshuaj biochemical tseem ceeb ntawm E.
Yuav ua li cas E. coli tsis ferment lactose?
coli O75 clonal pawg yog qhov tseem ceeb ntawm cov uas tsis yog-ST131 fluoroquinolone-resistant E. coli thiab nthuav, tag nrho cov serotype O75 cais tawm tsis yog lactose fermenters [3]. E. coli O75 tau ntev los cuam tshuam nrog kev kis kab mob urinary tract (UTI) thiab sepsis hauv tib neeg [4].
Cov kab mob puas tuaj yeem ferment lactose?
Cov kab mob uas tuaj yeem tsim cov enzyme lactase tuaj yeem ferment cov lactosethiab yuav tsim cov kua qaub pov tseg, uas yuav txo cov pH ntawm cov xov xwm. Qhov taw qhia pH, nruab nrab liab, hloov ci fuchsia hauv cov xim, vim qhov qis pH thaum lactose yog fermented.
