Hookworms(钩虫) Two major species of hookworms ancylostoma ouden e wae can infect human Necator americanus (美洲板口线虫) Ancylostoma duodenale (十二指肠钩口线虫) 2mm Peter DarbenHookworms (钩虫) Two major species of hookworms can infect human Necator americanus (美洲板口线虫) Ancylostoma duodenale (十二指肠钩口线虫)