Kalmar "Genus Leptospira" tana nufin rukuni na ƙwayoyin cuta spirochete masu sirara da murɗe su, suna iya haifar da wata cuta mai suna leptospirosis a cikin dabbobi da mutane. Ana samun kwayoyin cutar Leptospira a cikin gurbataccen ruwa, ƙasa, ko abinci, kuma ana iya yada su zuwa ga mutane ta hanyar hulɗa da dabbobi masu kamuwa da cuta ko fitsarinsu. Letus Leptospira ya ƙunshi nau'ikan da yawa, wasu daga cikinsu suna da cuta kuma suna haifar da rashin lafiya cikin mutane, yayin da wasu ba pathogenic kuma suna da alaƙar smulotiotic da kuma samun dangantaka ta smypotiotic da kuma samun dangantaka ta smypotizo da rundunarsu.