Qhov sib txawv tseem ceeb ntawm cov tshuaj ntsiav thiab glycocalyx yog cov tshuaj ntsiav yog ib qho kev sib koom ua ke, zoo txhais, condensed extracellular txheej uas nruj nreem khi rau lub hnab ntawv ntawm cov kab mob, thaum glycocalyx yog ib txheej ntxiv ntawm polysaccharides thiab / lossis polypeptides sab nraud. lub cell phab ntsa ntawm cov kab mob.
Qee cov kab mob muaj ib txheej ntxiv hu ua glycocalyx sab nraum phab ntsa ntawm tes. Nws yog ua los ntawm cov ntaub ntawv extracellular. Nws tiv thaiv cov kab mob los ntawm kev mob sab nraud thiab pab ua raws li qhov chaw. Glycocalyx muaj nyob rau hauv ob hom: slime txheej los yog capsule. Slime txheej yog txheej extracellular uas yog xoob txuam nrog cov kab mob cell phab ntsa. Nws yog ib txheej tsawg discrete uas tuaj yeem ntxuav tau yooj yim. Capsule txuas nruj nreem rau ntawm phab ntsa ntawm tes, thiab nws yog txheej tuab tuab. Capsule tsis tuaj yeem tshem tau yooj yim ntawm cov kab mob. Ob txheej slime thiab capsule pab cov kab mob los ntawm desiccation thiab antimicrobial agents. Feem ntau ntawm cov kab mob encapsulated yog pathogenic, thiab lawv zam phagocytosis vim lawv glycocalyx.
Capsule yog dab tsi?
Capsule yog ib qho ntawm cov qauv sab nraud uas muaj qee cov kab mob. Lawv yog tsim los ntawm cov polymers ntawm polysaccharides. Capsule yog ib qho qauv tsim uas nyob ib puag ncig lub hnab ntawv ntawm cov kab mob, thiab nws nruj nreem khi rau lub hnab ntawv ntawm tes. Yog li ntawd, nws yog ib qho nyuaj heev los ntxuav tawm. Capsule yog tuab thiab pab cov kab mob kom tsis txhob phagocytosis. Tsis tas li ntawd, capsules yog hydrophilic hauv qhov xwm txheej. Li no, nws tiv thaiv kab mob los ntawm desiccation.
Kev tsim cov tshuaj ntsiav yog tswj cov caj ces thiab raug hloov kho ib puag ncig. Qhov ntom, tuab thiab nplaum ntawm cov tshuaj ntsiav sib txawv ntawm cov kab mob sib txawv. Tsis tas li ntawd, cov tshuaj muaj pes tsawg leeg ntawm cov tshuaj ntsiav txawv ntawm cov kab mob. Lawv yuav muaj cov piam thaj polymers, complex polysaccharides, aminosugars, qab zib acids, thiab polypeptides ib leeg los yog ua ke.
Capsule yog suav tias yog qhov ua rau muaj kev phom sij ntawm cov kab mob vim nws muaj peev xwm khiav tawm ntawm tus tswv tsev tiv thaiv cov txheej txheem ua rau cov kab mob. Straphylococcus aureus yog ib hom kab mob uas tiv thaiv neutrophil phagocytosis vim nws cov tshuaj ntsiav. Lub capsule ntawm Streptococcus pneumoniae yog qhov tseem ceeb ua rau mob ntsws. Nws tau pom tias qhov poob ntawm cov tshuaj ntsiav txo cov kab mob virulence.
Daim duab 01: Capsule
Capsules muaj ntau txoj haujlwm. Lawv feem ntau kho kom haum xeeb ntawm cov hlwb rau qhov chaw. Capsules tseem tiv thaiv cov kab mob ntawm cov kab mob los ntawm kev nkag mus los ntawm cov kab mob protozoa lossis cov qe ntshav dawb lossis los ntawm kev tawm tsam los ntawm cov tshuaj tua kab mob. Qee zaum cov tshuaj ntsiav ua cov dej ntawm cov carbohydrates thaum cov kab mob noj nrog cov suab thaj. Lwm tus yam ntxwv tseem ceeb ntawm cov tshuaj ntsiav yog lub peev xwm los thaiv qee cov kauj ruam ntawm cov txheej txheem phagocytosis thiab yog li tiv thaiv cov kab mob ntawm cov kab mob los ntawm kev nkag los yog rhuav tshem los ntawm phagocytes.
Capsules tuaj yeem pom los ntawm cov txheej txheem tsis zoo staining siv Is Nrias tus cwj mem hauv qab lub tshuab tsom. Capsule yuav tshwm sim li ntshiab halos nyob ib ncig ntawm cov kab mob hlwb. Qee qhov piv txwv ntawm cov kab mob encapsulate yog Bacillus antracis, Klebsiella pneumonia, Streptococcus pneumonia thiab Clostridium perfringens.
YGlycocalyx yog dab tsi?
Glycocalyx yog ib qho qauv tseem ceeb hauv qee cov kab mob. Glycocalyx zam cov kab mob ntawm cov kab mob ntawm phagocytosis thiab pab tsim cov biofilms. Glycocalyx muaj nyob rau hauv ob daim ntawv li capsule thiab slime txheej. Lub capsule yog ib qho kev sib koom ua ke, nruj nreem khi tuab glycocalyx uas pab cov kab mob kom dim ntawm phagocytosis. Lub Slime txheej yog ib qho tsis muaj kev sib koom ua ke, xoob ua ke nyias glycocalyx uas tiv thaiv cov kab mob ntawm cov kab mob kom qhuav. Ntxiv mus, cov slime txheej ntxiab khoom noj khoom haus thiab pab tsim biofilm.
Daim duab 02: Glycocalyx
Cov slime txheej yog tsim los ntawm exopolysaccharides, glycoproteins, thiab glycolipids. Nws tuaj yeem ntxuav tau yooj yim vim nws txoj hlua khi rau ntawm phab ntsa ntawm tes. Structurally, nws yog ib tug xoob khi gelatinous extracellular txheej.
Dab tsi zoo sib xws ntawm Capsule thiab Glycocalyx?
- Ib yam txawv, gelatinous glycocalyx hu ua capsule.
- Yog li ntawd, tshuaj ntsiav yog ib qho ntawm ob hom glycocalyx.
Qhov txawv ntawm Capsule thiab Glycocalyx yog dab tsi?
Glycocalyx yog ib txheej ntxiv sab nraum phab ntsa ntawm tes uas muaj nyob rau hauv ob hom: capsule thiab slime txheej. Lub caij no, ib lub tshuaj ntsiav yog daim ntawv ntawm glycocalyx uas tau teeb tsa thiab txuas nruj rau ntawm phab ntsa ntawm tes. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm cov tshuaj ntsiav thiab glycocalyx. Tsis tas li ntawd, cov tshuaj ntsiav yog tsim los ntawm polysaccharides thaum nyias glycocalyx yog tsim los ntawm exopolysaccharides, glycoproteins, thiab glycolipids. Yog li, qhov no yog lwm qhov sib txawv ntawm cov tshuaj ntsiav thiab glycocalyx.
Ntxiv mus, cov tshuaj ntsiav tau txuas nrog rau ntawm phab ntsa ntawm tes thaum lub glycocalyx nyias nyias txuas rau ntawm phab ntsa ntawm tes. Tsis tas li ntawd, cov tshuaj ntsiav tsis yooj yim ntxuav tawm thaum nyias glycocalyx ntxuav tawm.
Cov hauv qab no infographic tabulates qhov sib txawv ntawm cov tshuaj ntsiav thiab glycocalyx kom ntxaws ntxiv.
Summary – Capsule vs Glycocalyx
Cov tshuaj ntsiav yog ib qho ntawm ob hom glycocalyx. Tsis tas li ntawd, lub capsule txuas nruj nreem rau ntawm phab ntsa ntawm tes. Yog li ntawd, nws nyuaj rau ntxuav tawm. Tsis tas li ntawd, lub xub ntiag ntawm cov tshuaj ntsiav yog ib qho kev ua phem ntawm cov kab mob. Cov glycocalyx nyias yog hu ua slime txheej, thiab nws yog xoob txuas mus rau phab ntsa ntawm tes. Yog li, nyias glycocalyx tuaj yeem ntxuav tau yooj yim. Tsis tas li ntawd, glycocalyx pab cov kab mob kom tsis txhob phagocytosis thiab tsim biofilms. Yog li, qhov no qhia txog qhov sib txawv ntawm cov tshuaj ntsiav thiab glycocalyx.
