In this activity, students do a case study of giardiasis,
an infectious disease caused by the tiny parasite Giardia
lambila ("lambilia" means intestine). Giardiasis
is sometimes called a "swimming pool" disease
because it is frequently transmitted via water from a pool
that has been contaminated by feces from an infected swimmer.
Students will apply what they have learned about the "host"
vertex of the Epidemiologic Triangle as they learn about