Iro zita rerudzi urwu rinobva kune eponymous musha wePatterdale, uri kuchamhembe kweBritain.
"Vapfuri" vekutanga vaive varimi nevarimi vaida mubatsiri anokurumidza uye ane hunyanzvi mukuvhima.
Imbwa dzerudzi urwu dzinosiyaniswa nehunhu uye kufara, genetic predisposition yekutaurirana nevanhu.