Qhov sib txawv tseem ceeb ntawm Listeria thiab Salmonella yog Listeria yog ib hom kab mob gram-zoo kab mob thaum Salmonella yog ib hom kab mob gram-negative pathogenic.
kab mob noj zaub mov yog tshwm sim los ntawm cov kab mob, kab mob, lossis kab mob uas kis tau cov zaub mov. Cov tsos mob ntawm cov mob no feem ntau muaj xws li ntuav, kub taub hau, mob, thiab raws plab. Qee cov kab mob microbes uas ua rau muaj kab mob hauv cov zaub mov tau khiav tawm ntawm txoj hnyuv thiab nkag mus rau hauv cov hlab ntsha. Yog li, cov kab mob no tuaj yeem ua rau muaj kab mob hauv lwm qhov ntawm tib neeg lub cev. Txawm li cas los xij, tag nrho cov kab mob ntawm cov khoom noj tuaj yeem ua rau gastroenteritis. Gastroenteritis yog qhov mob ntawm txoj hnyuv, nrog rau lub plab thiab txoj hnyuv. Listeria thiab Salmonella yog ob hom kab mob uas muaj peev xwm ua rau mob plab.
Listeria yog dab tsi?
Listeria yog ib hom kab mob ntawm cov kab mob uas ua rau cov kab mob hauv lub cev hauv cov tsiaj. Txog 21 hom kab mob tau raug txheeb xyuas thiab suav nrog hauv cov genus no. Cov genus no muaj npe nyob rau hauv kev hwm ntawm British kws phais neeg thiab kws kho mob kws tshawb fawb Joseph Lister, tus thawj coj ntawm kev phais tshuaj tua kab mob. Listeria hom yog gram-positive, qws-puab, thiab facultative anaerobes. Lawv tsis tsim endospores.
Daim duab 01: Listeria
Cov kab mob loj ntawm tib neeg hauv cov kab mob Listeria yog Listeria monocytogens. Hom kab no feem ntau yog tus kab mob ua rau tus kab mob tsawg tsawg hauv tib neeg hu ua listeriosis. Listeriosis yog ib qho kab mob tshwm sim vim noj zaub mov kis nrog Listeria monocytogens. Listeriosis tuaj yeem ua rau muaj kab mob hauv cov poj niam cev xeeb tub, cov menyuam yug tshiab, cov neeg laus, thiab cov neeg uas tsis muaj zog tiv thaiv kab mob. Cov kab mob no muaj xws li nchuav menyuam, septicemia, thiab meningitis. Hauv lwm tus, nws tsuas ua rau gastroenteritis xwb. Qee qhov xwm txheej tsis zoo ntawm Listeria monocytogens suav nrog hemolysins (listeriolysin O), ob qhov sib txawv phospholipases, protein hu ua ActA, thiab internalins. Tsis tas li ntawd, Listeria ivanovii yog lwm yam kab mob ntawm cov tsiaj, tshwj xeeb tshaj yog nyob rau hauv ruminants, thiab tsis tshua muaj ua rau listeriosis hauv tib neeg. Kev kho mob rau listeriosis suav nrog kev xa cov tshuaj tua kab mob siab hauv cov hlab ntsha xws li ampicillin, penicillin, amoxicillin, thiab gentamicin, thiab kev kho mob hauv tsev kho mob.
Salmonella yog dab tsi ?
Salmonella yog ib tug genus ntawm tus pas nrig, gram-negative facultative anaerobes kab mob uas yog tsev neeg enterobacteriaceae. Salmonella hom tsis yog-spore-forming, motile enterobacteria nrog cell diameters ntawm 0.7 mus rau 1.5 μm thiab ntev ntawm 2 mus rau 5 μm. Cov tsiaj no kuj muaj peritrichous flagella nyob ib ncig ntawm lub cev. Ob hom Salmonella muaj xws li Salmonella enterica thiab Salmonella bongori. Salmonella enterica tau muab faib ua 6 subspecies.
Daim duab 02: Salmonella
hom Salmonella feem ntau yog cov kab mob hauv lub cev. Feem ntau kis tau los ntawm kev noj cov zaub mov uas kis los ntawm cov quav tsiaj lossis tib neeg cov quav. Ntxiv mus, kab mob Salmonella serotypes tuaj yeem muab faib ua ob pawg tseem ceeb xws li typhoidal thiab nontyphoidal. Nontyphoidal serotypes tuaj yeem hloov los ntawm tsiaj mus rau tib neeg lossis los ntawm tib neeg mus rau tib neeg. Lawv tsuas ua rau lub plab zom mov thiab ua rau salmonellosis. Sub-Saharan African nontyphoidal Salmonella hom kab mob kis tau ntau dua thiab ua rau mob npaws paratyphoid. Ntawm qhov tod tes, typhoidal serotypes tsuas yog kis tau los ntawm tib neeg mus rau tib neeg, ua rau muaj kab mob hauv cov zaub mov xws li typhoid fever thiab paratyphoid fever. Tus kab mob typhoid yog tshwm sim los ntawm Salmonella serotypes invading cov hlab ntsha, kis thiab invading thoob plaws lwm lub cev. Typhoidal serotypes kuj secrete endotoxins. Cov kab mob typhoidal serotypes tuaj yeem ua rau muaj kev phom sij rau lub neej hypovolemic shock, septic shock uas xav tau kev saib xyuas hnyav, thiab tshuaj tua kab mob. Cov tshuaj tua kab mob uas siv rau kev kho mob suav nrog ciprofloxacin, azithromycin, thiab cephalosporins.
Dab tsi yog qhov zoo sib xws ntawm Listeria thiab Salmonella ?
- Listeria thiab Salmonella yog ob hom kab mob uas muaj peev xwm ua rau mob plab.
- Cov kab mob ntawm ob lub noob yog cov kab mob hauv lub cev.
- Lawv yog pas nrig thiab facultative anaerobes.
- Cov no tsis yog-spore-forming thiab motile.
- Lawv tuaj yeem ua rau muaj kab mob sib kis los ntawm kev kis mus rau lwm qhov ntawm lub cev.
- Kab mob los ntawm cov kab mob ntawm ob lub noob yog kho nrog tshuaj tua kab mob.
Qhov txawv ntawm Listeria thiab Salmonella yog dab tsi?
Listeria yog ib hom kab mob uas muaj kab mob gram-zoo kab mob, thaum Salmonella yog ib hom kab mob uas muaj kab mob gram-tsis zoo. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm Listeria thiab Salmonella. Tsis tas li ntawd, cov genus Listeria muaj 21 hom kab mob, thaum lub genus Salmonella muaj ob hom kab mob.
Cov duab hauv qab no nthuav tawm qhov sib txawv ntawm Listeria thiab Salmonella hauv daim ntawv teev npe rau ib sab ntawm kev sib piv.
Summary – Listeria vs Salmonella
Listeria thiab Salmonella yog ob hom kab mob uas muaj peev xwm ua rau muaj kab mob hauv cov zaub mov (gastroenteritis) rau tib neeg. Listeria yog ib hom kab mob uas muaj kab mob gram-zoo kab mob, thaum Salmonella yog ib hom kab mob uas muaj kab mob gram-tsis zoo. Yog li, qhov no qhia txog qhov sib txawv ntawm Listeria thiab Salmonella.
