Okuningi Izifo ukuthi lezi zilwane zingahlupheka, zibangelwa ukuntuleka kwemvelo, okungavela emanzini, mhlawumbe ngenxa yokuthi izinga lokushisa kwazo alilungile noma ngoba nje lisesimweni esingesihle, futhi nangenxa yokudla noma ukuswela ukondleka komzimba, lapho kukhona amanye amavithamini, i-calcium, phakathi kokunye. Esinye sezifo ezivame kakhulu zofudu ubumpumputhe, izimfudu ezisencane zinamathuba amaningi okuthi ziphathwe yiso.
Ubumpumputhe, iqukethe ukuvalwa kwamehlo noma ukuvalwa okufanayo, okubangelwa uhlobo oluthile lokuvuvukala futhi nokuqina kwelinye lamajwabu amehlo akho. Kungabangelwa futhi uhlobo oluthile lokonakala emehlweni alo, okwenza ukuthi isilwane singakwazi ukuwavula. Ngale ndlela, ukuba yimpumputhe ekuqaleni bekungeke ngempela kuthinte amehlo. Ezimweni eziningi, ngaphandle kwempumputhe, amehlo ayeyohlala enempilo ngokuphelele, ngoba ayengakhiywa ngaphansi kwelinye lamajwabu amehlo abo, yingakho bekungeke kwenzeke ukuba babone. Kodwa uma ufudu lungaphuphutheka, belungakwazi ukondla, belungeke lukwazi ukuthola ukudla, futhi lungafa yindlala.
Phakathi kwe izimbangela zobumpumputhe kunezici eziningana ezitholakalayo. Okokuqala, enye yezinto engathinta kakhulu isilwane amanzi ompompi noma ompompi. Njengoba sonke sazi, amanzi aphuma empompini anenqwaba ye-chlorine, into eyingozi kakhulu kulezi zilwane ezincane. Kungalesi sizathu, ukuthi sincoma nonke nina bofudu basekhaya, noma abahlela ukuba nabo, ukuthi esikhundleni sokusebenzisa amanzi ompompi, sebenzisa amanzi angafakwanga ukhilimu noma aphathe amanzi ompompi ngohlobo oluthile lwe-antichloro.
Kodwa-ke, akusiyona ukuphela kwembangela yobumpumputhe ezimfudu, ngoba amehlo abo nawo angathinteka kulesi sifo uma bengenayo uvithamini A owanele emzimbeni wabo, uma behlushwa uhlobo oluthile ukutheleleka kwefungal, noma nje uma isikhunta siqala ukuvela endaweni yabo ethinta futhi ivuthe amehlo abo.