Qhov Tseem Ceeb Qhov txawv - Coliform vs Fecal Coliform
Nws tau dhau los ua qhov tseem ceeb los ua kom cov dej haus zoo hauv ntiaj teb niaj hnub no. Kev sim rau txhua yam kab mob pathogenic hauv dej yog kim thiab siv sijhawm ntev. Txoj hauv kev zoo tshaj plaws kom paub meej txog kev nyab xeeb ntawm cov dej rau kev noj yog kuaj rau coliforms. Coliform yog ib qho gram tsis zoo uas tsis yog-spores tsim cov kab mob uas muaj cov qauv pas nrig. Muaj peb pawg tseem ceeb ntawm coliforms thiab fecal coliform yog ib qho ntawm lawv. Qhov sib txawv tseem ceeb ntawm coliform thiab fecal coliform yog qhov fecal coliforms loj hlob ntawm qhov kub siab dua thiab tsuas yog cuam tshuam nrog fecal teeb meem ntawm cov tsiaj ntshav sov.
Coliforms txheeb xyuas li cas?
Coliforms yog siv los ua qhov ntsuas tsis zoo hauv kev ntsuas dej zoo thaum lub sij hawm kev nyab xeeb ntawm cov dej haus thiab lwm yam khoom noj khoom haus. Eosin methylene xiav agar phaj yog siv los paub qhov txawv ntawm ntau hom kab mob coliform. Lub phaj yog inhibitory rau gram zoo kab mob thiab yuav tsim ib tug xim hloov nyob rau hauv gram negative bacteria. Kev tsim cov xim yog nyob ntawm qhov muaj peev xwm ntawm cov kab mob gram tsis zoo rau ferment lactose. Cov kab mob uas ferment lactose xav tau yuav tshwm sim hauv cov xim xiav lossis ntshav liab. Fecal coliforms xws li Escherichia coli tshwm nyob rau hauv cov xim tsaus nti nrog cov luster ntawm cov xim hlau ntsuab ntawm qhov chaw. Lwm cov coliforms yuav tshwm sim nyob rau hauv tuab slimy colonies thiab tsis-fermenters yuav tshwm tsis muaj xim.
Coliforms yog dab tsi?
Coliforms yog qws zoo li tus, uas tsis yog-sporing ua cov kab mob gram tsis zoo. Lawv tuaj yeem yog motile lossis tsis txav thiab muaj peev xwm ferment lactose thaum incubated ntawm qhov kub ntawm 35 0 C txog 37 0 C. Coliforms muaj nyob rau hauv ntau qhov chaw sib txawv xws li av, nroj tsuag, chaw nyob hauv dej thiab fecal teeb meem ntawm tag nrho cov tsiaj ntshav sov nrog rau tib neeg. Lawv raug siv los ua cov ntsuas ntsuas kev noj qab haus huv hauv dej thiab khoom noj. Txawm li cas los xij, lawv qhov muaj nyob hauv dej haus qhia tau tias muaj kev pheej hmoo ntawm cov kab mob pathogenic muaj nyob hauv cov dej. Coliforms muaj peb pawg. Txhua pawg muaj nws tus kheej theem ntawm kev pheej hmoo thiab yog qhov qhia txog kev haus dej zoo.
- tag nrho coliforms
- Fecal coliforms (Sub pawg ntawm tag nrho cov coliforms)
- Escherichia coli (Sub pawg ntawm fecal coliforms)
Tag nrho cov coliforms feem ntau suav hais tias tsis muaj mob. Yog tias cov dej raug kuaj thiab kuaj pom tag nrho cov coliforms nws raug suav hais tias yog qhov tsis muaj teeb meem ib puag ncig thiab kev kis kab mob fecal coliform tsis zoo li.
Fecal Coliforms yog dab tsi?
Fecal coliforms yog ib pawg ntawm cov kab mob coliform tag nrho. Fecal coliforms yog ib pawg ntawm cov kab mob uas cuam tshuam nrog fecal teeb meem ntawm cov kab mob ntshav sov. Lawv nyob hauv cov hnyuv ntawm cov kab mob ntshav sov thiab kis mus rau ib puag ncig los ntawm fecal excrement. Thaum piv nrog rau lwm cov coliforms, fecal coliforms muaj peev xwm loj hlob ntawm qhov kub thiab txias thiab thaum lawv incubated ntawm 44 0 C, lawv muaj peev xwm ferment lactose thaum tsim cov ntawv sib txawv gaseous. Fecal coliforms feem ntau yog siv rau hauv kev ruaj ntseg zoo ntawm cov dej haus. Yog tias tam sim no, nws tau hais tias cov dej muaj cov kab mob fecal thiab qhia tias muaj feem cuam tshuam rau cov tib neeg uas haus dej no.
Daim duab 02: Fecal coliform E. coli.
Escherichia Coli yog ib pawg ntawm pawg fecal coliform thiab yog ib tus tswv cuab. Lub xub ntiag ntawm fecal coliforms nyob rau hauv cov qauv dej qhia tau hais tias yuav muaj kab mob fecal thiab qhov no cuam tshuam rau tib neeg dua li lwm yam kab mob hauv dej. Tsis yog txhua hom Escherichia coli yog cov kab mob. Fecal coliforms, tshwj xeeb tshaj yog cov kab mob phem Escherichia coli (O157: H7) muaj peev xwm ua rau muaj ntau yam kab mob tuag taus xws li gastroenteritis.
Dab tsi zoo sib xws ntawm Coliform thiab Fecal Coliform?
- Ob leeg coliforms thiab fecal coliforms yog cov cim qhia ntawm cov dej paug thiab siv los ua ib qho kev ntsuas hauv cov txheej txheem kev nyab xeeb.
- Lawv yog gram tsis zoo uas tsis yog-spores tsim cov kab mob nrog cov qauv pas nrig.
- Ob pab pawg muaj nyob hauv dej, av, thiab zaub.
- Ob hom ferment lactose.
Qhov txawv ntawm Coliform thiab Fecal Coliform yog dab tsi?
Coliform vs Fecal Coliform |
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| Coliforms muaj peb qhov kev faib loj: tag nrho cov coliforms, fecal coliforms, thiab Escherichia coli. | Fecal coliforms belongs rau qeb sub ntawm tag nrho cov coliforms. |
| Pathogenicity | |
| Lawv tsis muaj mob. | Lawv muaj peev xwm ua tau ntau yam kab mob tuag taus. |
| Lactose Fermentation | |
| Coliforms ferment lactose nyob rau hauv qhov kub ntawm 35 0 C txog 37 0 C. | Lactose fermentation yog ua tiav thaum incubated ntawm qhov kub ntawm 44 0 C. |
| Tsub Tolerance | |
| Lawv muaj sia nyob ntawm qhov sib piv qis dua cov fecal coliform. | Cov no muaj peev xwm loj hlob ntawm qhov ntsuas kub siab. |
| Testing on Eosin Methylene Blue Agar Phaj | |
| Lawv tshwm nyob rau hauv tuab slimy colonies. | Lawv tshwm hauv cov xim tsaus nti nrog lub ntsej muag muag ntawm cov xim hlau ntsuab ntawm qhov chaw. |
Summary – Coliform vs Fecal Coliform
Coliforms yog ib pawg ntawm cov kab mob uas muaj nyob hauv ntau qhov chaw. Lub xub ntiag ntawm lawv nyob rau hauv lub tshuab dej yog suav hais tias yog ib theem ntawm kev sib kis. Muaj peb hom coliforms. Lub xub ntiag ntawm tag nrho cov coliforms nyob rau hauv dej yog suav hais tias yog tsis tshua muaj teeb meem tab sis lub xub ntiag ntawm fecal coliforms nrog rau Escherichia coli yog suav hais tias yog ib theem ntawm fecal contamination, uas ua rau muaj ntau yam kab mob tuag taus. Qhov no yog qhov txawv ntawm coliforms thiab fecal coliforms. Kev ntsuam xyuas rau cov coliforms yog ua los xyuas kom meej qhov zoo ntawm cov dej haus.
Download PDF Version of Coliform vs Fecal Coliform
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li cov ntawv sau tseg. Thov download PDF version ntawm no Qhov txawv Ntawm Coliform thiab Fecal Coliform.
