Streptococcus viridans: kwebalingisi of pathogen futhi ukutheleleka

Nezilwanyana ezincane yonke indawo futhi nihlale umzimba wethu, njengoba kuyingxenye ebalulekile ke nezwe wonkana. Nokho, akuwona wonke ayingozi empilweni zethu, kunalokho, labo amagciwane ezakha flora evamile kwezitho izinhlelo zabantu ezihlukahlukene, ukumelana amagciwane alien futhi kuvimbele okuvela izifo. Ngaphezu kwalokho, okuyisici esibalulekile sokuvikela amasosha omzimba, kodwa uma ubhidlika ngisho kunemibandela flora pathogenic kungabangela isifo. Omunye nababamele bhá kuyinto streptococcus viridans, okuzoxoxwa.

ulwazi oluyisisekelo

Kungenjalo okubhekiselwe kubo ngelithi "strep zelenyaschy", lena owakhileyo ejwayelekile ngalo ingaphakathi lomuntu temlomo, lapho yenziwe yaba yasendaweni kuya amazinyo nezinsini zakho, futhi ngokuvamile iba imbangela caries kwamazinyo. Lokhu kungenxa yokuthi isakhiwo streptococcus viridans has a ebusweni amaprotheni ekhethekile uyakwazi ngibopha ngamathe futhi ngaleyo ndlela exhunywe izinyo. A sucrase yokuvuma ngokudla Ishintsha kube acidosis acid, nemibi eyonakalisa koqweqwe lwawo. Igama layo ezithakazelisayo wathola ngoba lapho bacteriological ayihlwanyelayo emhlabathini evundile igazi agar la magciwane yakha emhlabeni koloni lazo zelenyaschy indawo ye hemolysis. Nokho, kukhona namanye amaqembu lokhu streptococci hemolytic (imvelo hemolyzed ngokuphelele) kanye non-hemolytic (haemolytic babe enzyme). Uma beqhathaniswa streptococcus iqembu lokuqala viridans hhayi eyingozi umzimba womuntu futhi bangabenzi ekuphikisweni ngokunamandla ingasaphathwa. Nokho, nge buthakathaka amasosha omzimba, bona ukukhuthalele banda, nethonya pathogenic, okubangela izifo ezingosomathuba, futhi ngaso sonke isikhathi inkambo elula.

microbiology

Manje ake sibheke ezinye kabanzi mayelana nokuthi yini kuba streptococcus viridans. Uma sikhuluma la magciwane kusukela iphuzu microbiological umbono, zingabantu eyindilinga noma ovoid igremu-HIV cocci, musa yakha ezinhlamvu. It kungokwalabo iqembu anaerobes facultative futhi zihlanganisa Streptococcaceae umndeni. Ukuze uthole ukuthi kubukeka kanjani streptococcus viridans, ukuthi kuyini, nje bheka microscope ukukhanya. Ngakho ungabona ukuthi iningi labo ahlelwe ngazimbili noma kokuya ngamaketanga, kodwa ahlale umile. Bona bayingozi amasosha ethu omzimba itholakala lokuthi bakwazi ukwakha capsule ukuthi sibavikela phagocytosis ngu egazi ezikhethekile, futhi kungaba kalula ibe i-L ukuma, ngaleyo ndlela mutating, njengoba kungaba njalo nangabantu isikhathi eside ecashele yezingxenye kwesimiso sethu sokuzivikela.

Ukuhlanyela virulence

izidingo izakhi ala magciwane, ngokungafani staphylococci, abasakwazi eziyinkimbinkimbi. Zikhula kahle kuphela labo ezindaweni lapho ukulungiselela igazi njengoba linjalo noma serum, njengoba kudingeka nesitashi amandla ayesetshenziselwa. Yingakho iningi zokutshala bacteriological viridans streptococci wasebenzisa igazi agar. In imvelo bangaphandle, zingabantu esitebeleni ngempela, ngoba, isibonelo, kwi omisiwe izinto yemvelo (igazi, ubomvu, isikhwehlela), zikwazi ukusebenza kwabo ezinyangeni ezimbalwa. Pasteurization, magciwane, zife, kodwa hhayi ngokushesha. Ngakho, lapho ukufuthelana lokushisa 60 Celsius ukufa kwabo kuphela kwenzeka isigamu sehora, futhi isicelo des. izinsiza - emizuzwini engu-15.

lwezifo

Iqiniso lokuthi phakathi microflora evamile yomzimba womuntu, kanye nama-bacterium amaningi, ingena futhi streptococcus viridans - kuyinsakavukela. Nokho, lokhu kusebenza kuphela inani elithile nobunzima, futhi agcwaliswa it can esuka kubantu elinegciwane, abathwali ie ka streptococci noma asebengenwe igciwane yezindlela eziningi ukutheleleka (umphimbo obuhlungu, scarlet fever, i-pneumonia, njll). Iziguli esiyingozi kakhulu engenhla zokuphefumula ipheshana izifo, ngoba ihlaba umkhosi streptococci okuningi imvelo. Ngakho, indlela eyinhloko igciwane - sisemoyeni, okungukuthi, ngokukhuluma, sneezing, ukukhwehlela, ukuqabulana, njll.; kwezinye izimo zingenza yokudla okunempilo (wezokudla) kanye contact (izandla ezingcolile). Kuyaziwa ukuthi amalungu amaningi aleli butho A streptococci kungaba njalo ukugcina virulence yabo izakhiwo nabo imikhiqizo, okuyizinto ngabo, eqinisweni, isimo esikahle. Lezi zihlanganisa amaqanda, ubisi, ham ne-shellfish.

yezinkinga

Lesi sifo esisongela kubangelwa viridans futhi streptococci non-hemolytic, kuyinto endocarditis infective. Iqiniso kuwela ngaphakathi bendawo ukuthi, bese kwegazi lapho ukulimala mucosa ngomlomo (izinsini, ulimi) isixubho noma Floss stomatitis streptococcus viridans. Ukufinyelela ngokusuka enhliziyweni, kungase kufakwe i-valve futhi ikoloni kubo. ithuthukisa Ngakho lesi sifo. Iqala, njengoba umthetho, izimpawu ezivamile: ubuthakathaka, ukucobeka imfiva. Lokhu kungenxa ngokuyinhloko yokuthi ngokuvamile kubangela zamagciwane emaphakathi noma slabovirulentnye.

Umtholampilo kanye nemiphumela

Uma imbangela endocarditis infective zisho amagciwane, isifo iqala babazi futhi ephelezelwa lokushisa febrile, kuze kube degrees amane. Kulokhu kukhona imisipha kuqondane and ubuhlungu bamalunga, futhi auscultation wezwa inhliziyo nokububula. Ingozi yalesi sifo kubhujiswa lesi endocardium, isb ukubonakala ukusonteka valve vegetations webhaktheriya kubo. Nge lamabutho wabo uthuthuka izitsha embolism microbial, okuholela ukumelwa inhliziyo nokushaywa unhlangothi. Ngaphezu kwalokho, isifo sokuvuvukala kwemithambo ungakheka imithambo ezinkulu, ubuchopho ithumba, meningitis, encephalopathy futhi senhliziyo.