Kwayar Cutar Corynebacterium diphtheriae
kwayar cutar Corynebacterium diphtheriae sitace  kwayoyin cutar da ke haifar da cutar diphtheria .  An kuma san ta  da Klebs-Löffler bacillus, saboda an gano shi a cikin 1884 ta masu binciken kwayoyin cutar na Jamus Edwin Klebs (1834-1912) da Friedrich Löffler (1852-1915).  Kwayoyin yawanci ba su da lahani sai dai idan sukayi tarayya  da kwayar cutar bacteriophage mai dauke da kwayar halittar da ke haifar da guba .  Wannan guba yana haifar da cutar. Diphtheria tana faruwa ne ta hanyar mannewa da kutsawa daga cikin kwayoyin cuta zuwa cikin sassan jikin mucosal, da farko yana shafar hanyoyin numfashi da sakin dafi na gaba. dafin yana da tasiri mai tasiri akan raunuka na fata, da kuma metastatic, tasirin proteolytic akan sauran tsarin gabobin a cikin jiki masu tsanani.  Asalin babban dalilin mace-macen yara, diphtheria ya kusan kawar da shi saboda tsananin gudanar da allurar diphtheria a cikin 1910s.

Diphtheria baya yaduwa akai-akai saboda haɓakar rigakafinta, DTaP. Ko da yake ana ci gaba da samun barkewar cutar diphtheria, wannan sau da yawa a cikin ƙasashe masu tasowa inda yawancin jama'a ba a yi musu allurar rigakafi ba.

Rabe- rabe 
An gane nau'o'i hudu: C. d. matsi, C.d. intermedius, C.d. gravis, da C.d. belfanti . Daban-daban nau'ikan nau'ikan nau'ikan guda huɗu sun bambanta kaɗan kaɗan a cikin tsarin halittarsu na mulkin mallaka da kaddarorin sinadarai, kamar ikon sarrafa wasu abubuwan gina jiki. Duk yana iya zama mai guba (sabili da haka yana haifar da diphtheria) ko ba mai guba ba.

Rubutun nau'i-nau'i ya ƙunshi kwatanta nau'in kwayoyin cuta da rarraba su zuwa nau'i-nau'i.  Rubutun juzu'i shima yana taimakawa wajen gano asalin fashewar wasu kwayoyin cuta. Duk da haka, idan ya zo ga subtyping na C. diphtheriae, babu wani abu mai yawa mai amfani ko daidaitaccen rarrabuwa saboda rashin wadataccen albarkatun jama'a don gano nau'i don haka gano asalin fashewa.

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