Qhov sib txawv tseem ceeb ntawm Salmonella thiab Shigella yog hom Salmonella ua rau salmonellosis hauv tib neeg thaum Shigella hom ua rau shigellosis hauv tib neeg.
Salmonella thiab Shigella yog ob hom kab mob uas yog gram-negative hauv xwm. Qhov no txhais tau tias lawv cov hlwb muaj cov txheej txheem ntau ntawm peptidoglycan, uas yog cov khoom zoo li mesh uas muab cov qauv thiab lub zog. Cov kab mob no kuj yog facultative anaerobes thiab bob-spore-forming kab mob. Cov kab mob ntawm ob hom kab mob no ua rau tib neeg kis mob hnyav thiab. Yog li ntawd, lawv yog tib neeg kab mob.
Salmonella yog dab tsi?
Salmonella yog ib hom kab mob ntawm cov kab mob gram-negative ntawm tsev neeg Enterobacteriaceae. Cov genus no muaj ob hom kab mob, suav nrog Salmonella enterica thiab Salmonella bongori. Salmonella enterica tau muab faib ua 6 subspecies uas suav nrog ntau dua 2600 serotypes. Tsis tas li ntawd, Salmonella tau raug hu ua Daniel Elmer Salmon (1850-1914), tus kws phais neeg Asmeskas. Salmonella hom tsis yog-spore-forming thiab motile enterobacteria nrog cell diameters ntawm 0.7 thiab 1.5μm, thiab ntev ntawm 2 mus rau 5μm. Lawv muaj peritrichous flagella nyob ib ncig ntawm lub cev, cia lawv txav mus. Cov kab mob no yog chemotrophs tau txais lawv lub zog los ntawm oxidation thiab txo cov tshuaj tiv thaiv los ntawm cov organic. Salmonella kuj yog facultative anaerobes muaj peev xwm tsim ATP nrog oxygen thaum cov pa oxygen muaj lossis siv lwm cov khoom siv hluav taws xob los yog fermentation thaum tsis muaj oxygen.
Daim duab 01: Salmonella
Salmonella genus muaj cov kab mob uas ua rau salmonellosis hauv tib neeg. Cov kab mob ntawm cov genus no yog cov kab mob intracellular. Yog li ntawd, qee yam serotypes tuaj yeem ua rau tib neeg mob. Salmonella serotypes uas ua rau tib neeg mob tuaj yeem muab faib ua ob pawg loj: typhoidal thiab nontyphoidal. Typhoidal serotypes tsuas yog kis tau los ntawm tib neeg mus rau tib neeg thiab tuaj yeem ua rau kis tau cov zaub mov, typhoid fever, thiab paratyphoid fever. Typhoid fever yog vim Salmonella nkag mus rau hauv cov hlab ntsha thiab kis thoob plaws lub cev, nkag mus rau hauv nruab nrog cev thiab secreting endotoxins. Tsis tas li ntawd, nontyphoidal serotypes yog zoonotic thiab tuaj yeem hloov ntawm tsiaj mus rau tib neeg thiab los ntawm tib neeg mus rau tib neeg. Txawm li cas los xij, lawv feem ntau cuam tshuam tsuas yog hauv plab hnyuv thiab ua rau salmonellosis.
Shigella yog dab tsi?
Shigella yog ib hom kab mob gram-negative, facultatively anaerobic, non-spore-forming, tsis-motile, thiab qws-zoo li tus. Lawv muaj feem cuam tshuam nrog E. coli. Cov genus no muaj npe tom qab Kyoshi Shiga, uas nrhiav tau nws hauv 1897.
Daim duab 02: Shigella
Cov kab mob ntawm cov genus no yog cov kab mob ua rau tib neeg shigellosis. Shigella hom kab mob ua rau muaj kab mob nyob rau hauv primates tab sis tsis nyob rau hauv lwm yam tsiaj. Cov tsiaj no tsuas pom muaj nyob hauv tib neeg thiab gorillas. Hom Shigella feem ntau ua rau mob plab. Shigella yog ib qho ntawm cov kab mob ua rau mob raws plab thoob ntiaj teb, ua rau kwv yees li 80 txog 165 lab tus neeg mob. Tus naj npawb ntawm cov neeg tuag los ntawm hom Shigella yog nyob ib ncig ntawm 74000 txog 600000 ib xyoos. Ntxiv mus, hom Shigella yog ib qho ntawm plaub tus kab mob saum toj kawg nkaus uas ua rau mob raws plab rau cov menyuam yaus African thiab South Asian.
Dab tsi zoo sib xws ntawm Salmonella thiab Shigella?
- Salmonella thiab Shigella yog ob hom kab mob uas muaj cov kab mob gram-negative hauv xwm.
- Ob lub genera belongs rau tsev neeg Enterobacteriaceae.
- Lawv muaj cov txheej txheem peptidoglycan ntau hauv cov phab ntsa ntawm tes, cov khoom zoo li mesh uas muab cov qauv thiab lub zog.
- Cov kab mob ntawm ob hom no kuj yog cov facultative anaerobes thiab bob-spores tsim cov kab mob.
- Cov kab mob uas muaj nyob rau ntawm ob hom no ua rau tib neeg kis mob hnyav thiab.
Qhov txawv ntawm Salmonella thiab Shigella yog dab tsi?
Salmonella yog ib hom kab mob uas ua rau cov kab mob salmonellosis hauv tib neeg, thaum Shigella yog ib hom kab mob uas ua rau shigellosis hauv tib neeg. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm Salmonella thiab Shigella. Tsis tas li ntawd, cov kab mob Salmonella yog qwj zoo li tus kab mob Shigella cov kab mob sib luag.
Cov duab hauv qab no nthuav tawm qhov sib txawv ntawm Salmonella thiab Shigella hauv daim ntawv teev npe rau ib sab ntawm kev sib piv.
Summary – Salmonella vs Shigella
Salmonella thiab Shigella yog ob hom kab mob uas yog gram-negative. Lawv nyob rau tsev neeg Enterobacteriaceae. Cov kab mob uas muaj nyob rau ntawm ob hom no ua rau tib neeg kis mob hnyav. Salmonella ua rau salmonellosis hauv tib neeg, thaum Shigella ua rau shigellosis hauv tib neeg. Yog li, qhov no yog qhov txawv ntawm Salmonella thiab Shigella.
