Biology 1st Edition by Jerome Krueger, Kendra Hill, Robert Noyd

Exercise 14

Hookworms are internal parasites of humans, cats, and dogs. The life cycle is shown in Figure. For each of the following prevention and treatment methods, determine where in the life cycle (A, B, C, D) of the parasite the treatment works: (a) using a deworming drug, (b) cleaning up dog feces from a kennel or yard, (c) having children wash their hands after playing and eating, (d) preventing the cat from using the sandbox as a litter box, (e) treating pregnant dogs with deworming drugs, (f) not walking barefoot in areas where people walk their dogs.
Figure Hookworm life cycle.