Kalmar "cutar sumba" suna ne na magana don yanayin da aka sani da cutar mononucleosis, wanda kuma ake kira zazzabin glandular. Cuta ce mai saurin kamuwa da ita ta hanyar miyau, don haka sunan “cutar sumbata,” kamar yadda take yaduwa ta hanyar sumbata ko wata kusanci da al’amarin wanda ya kamu da cutar. Alamomin cutar mononucleosis sun haɗa da gajiya, ciwon makogwaro, zazzabi, kumburin gland, da ciwon jiki. Yawancin lokaci ciwon yana da iyaka kuma yana magance kansa a cikin 'yan makonni zuwa watanni da yawa.