Pigs can be carriers of various helminths, such as roundworms, pinworms, hookworms. It utilizes moxidectin for control and prevention of roundworms, hookworms, heartworms, and whipworms. These include hookworms, roundworms, and other amoebas. Ancylostomiasis is a hookworm disease caused by infection with Ancylostoma hookworms. In the developing world, those infected with whipworm often also have hookworms and ascariasis infections. Dog feces can also contain hookworms that cause cutaneous larva migrans in humans. Overall parasites and hookworms are killing off enough pups to place them in endangerment. Necator is a genus of nematodes that includes some species of hookworms. Ancylostoma is a genus of nematodes that includes some species of hookworms. The Ancylostomatidae are a family of worms that includes the hookworms. The symptoms worsen and result in possible death when the infestation reaches over 500 hookworms. Cats can harbor and transmit hookworms to people. An estimated 1 billion people are infected with hookworms. Hookworms infected about 428 million people in 2015. Necatoriasis is the condition of infection by "Necator" hookworms, such as "Necator americanus".