2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Cov rickettsia yog cov kab mob uas ua rau cov kab mob hauv lub cev. Lawv raug suav hais tias yog ib pawg ntawm cov kab mob sib cais vim lawv muaj cov yam ntxwv sib kis los ntawm cov kab mob arthropods (tsiv, hma, mites thiab zuam).
Dab tsi yog qhov tseem ceeb ntawm Rickettsia?
Tus rickettsiae yog ib qho kev sau sib txawv ntawm cov kab mob Gram-negative intracellular pom nyob rau hauv zuam, ntshauv, fleas, mites, chiggers, thiab tsiaj txhu. Lawv suav nrog cov genera Rickettsiae, Ehrlichia, Orientia, thiab Coxiella. Cov no zoonotic pathogens ua rau kis kab mob hauv cov ntshav mus rau ntau lub cev.
Qhov twg hauv qab no yog tus yam ntxwv ntawm Rickettsia?
Cov rickettsiae yog tus pas nrig lossis cov kab sib txawv, cov kab mob tsis zoo, thiab feem ntau hom yog gram-negative. Lawv yog cov kab mob ntuj tsim ntawm qee cov kab mob arthropods (tshwj xeeb tshaj yog cov ntshauv, fleas, mites, thiab zuam) thiab tuaj yeem ua rau cov kab mob loj heev-feem ntau yog tus cwj pwm los ntawm mob, tus kheej txwv tsis pub ua npaws-hauv tib neeg thiab lwm yam tsiaj.
Puas yog Rickettsia tau txais txiaj ntsig lossis tsim kev puas tsuaj?
Cov kab mob hauv cov genus Rickettsia yog qhov zoo tshaj plaws hu ua arthropod-vectored pathogens ntawm vertebrate hosts (Raoult & Roux 1997). Rickettsia yog intracellular, thiab yog symbionts nyob rau hauv lub dav kev nkag siab, muaj ib tug intimate (tab sis tsis tas yuav pab tau) kev sib raug zoo nrog lawv cov tswv.
Rickettsia cais li cas?
Kev faib tawm. Lub genusRickettsia encompasses ib pawg loj ntawm obligate intracellular, Gram-negative kab mob uas poob nyob rau hauv lub tsev neeg Rickettsiaceae, xaj Rickettsiales, chav kawm Alphaproteobacteria, phylum Proteobacteria.
Pom zoo:
Cov kab kab kab kab kab ua kab mob txaus ntshai npaum li cas?
Nyob rau hauv peb thiab tom ntej instars ntawm lawv txoj kev loj hlob, Pine processionary caterpillars yog mob heev rau daim tawv nqaij ntawm tib neegthiab lwm yam tsiaj. Kev sib cuag yooj yim nrog cov plaub hau ntawm kab ntsig tuaj yeem ua rau pob khaus hnyav (urticaria) thiab khaus qhov muag, thiab qee tus neeg yuav muaj kev fab tshuaj.
Puas yog phagocytes tshwj xeeb lossis tsis tshwj xeeb?
Enzymes pom hauv lub cell ces zom cov kab mob txhawm rau txhawm rau rhuav tshem nws. Raws li phagocytes ua li no rau tag nrho cov kab mob uas lawv ntsib, lawv hu ua tsis tshwj xeeb. Puas yog phagocytes ib feem ntawm cov tshuaj tiv thaiv kab mob tshwj xeeb lossis tsis tshwj xeeb?
Puas yog meristems tshwj xeeb lossis tsis tshwj xeeb?
Meristems yog thaj chaw ntawm cov hlwb tsis tshwj xeeb hauv cov nroj tsuag uas muaj peev xwm faib cov cell. Meristems ua rau cov hlwb tsis tshwj xeeb uas muaj peev xwm dhau los ua ib hom cell tshwj xeeb. Puas yog cov ntaub so ntswg meristematic tshwj xeeb?
Puas yog tshwj xeeb thiab tshwj xeeb?
Raws li lub npe qhov txawv ntawm kev tshwj xeeb thiab kev tshwj xeeb. yog tias kev tshwj xeeb yog thaum tshwj xeeb yog txheej txheem tshwj xeeb. Qhov twg yog Qhov Tshwj Xeeb lossis Tshwj Xeeb? "Specialisation" thiab "
Vim li cas cov duab peb sab tshwj xeeb tshwj xeeb?
Kev paub txog kev sib raug zoo ntawm cov ces kaum lossis qhov sib piv ntawm ob sab ntawm cov duab peb sab tshwj xeeb tso cai rau ib tus kom sai sai suav ntau qhov ntev hauv cov teeb meem geometric yam tsis muajsiv rau ntau txoj hauv kev. Puas yog daim duab peb sab tshwj xeeb?
