Ibisobanuro bigufi:

Uduce tw’umunyu dukoreshwa nk’urumuri rw’ibanze rw’akayunguruzo, umwobo wa 100 ~ 300nm, ubwiyongere bwinshi n’ubuso bunini bwihariye.

Shyira ubuso bunini n'ubuyunguruze buto muri kimwe, fata imyanda itandukanye mu bunini bw'uduce, ukureho ibyuma bikomeye nka iyoni za kalisiyumu na manyeziyumu hamwe n'ibikomoka ku kwica udukoko, binongera ubwiza bw'amazi.