The tapeworms most commonly found in the human alimentary canal are taenia solium also called the pork tapeworm or armed tapeworm , taenia saginata the beef tapeworm or unarmed tapeworm , and hymenolepis nana the dwarf tapeworm 在人體消化道內(nèi)寄生的絳蟲,常見的有豬肉絳蟲又名有鉤絳蟲牛肉絳蟲又名無鉤絳蟲和短小絳蟲等,現(xiàn)在以豬肉絳蟲為例說明。
This is one of the most common harmful effects that parasites have on their hosts . for example , roundworms and pork tapeworms live in the intestines and rob the body of nutritious substances in the intestines , thus causing malnutrition . 2 mechanical action : parasites can endanger the host through obstruction , compression and direct damage 1奪取營養(yǎng):寄生蟲攝食宿主的營養(yǎng)物質(zhì),供其發(fā)育繁殖和生存,這是寄生蟲對宿主造成最常見的危害之一,如蛔蟲和豬肉絳蟲寄生在小腸內(nèi),奪取腸道內(nèi)的營養(yǎng)物質(zhì),可引起營養(yǎng)不良。