"It is about the most awful thing you can imagine in terms of a non-fatal ailment. It's a parasitic disease and you kn…"

"All infections, of whatever type, with no exceptions, are products of parasitic beings; that is, by living organisms …"

"[The parasite that causes malaria] edges through the cells of the stomach wall of the mosquito and forms a cyst which…"

"[A] major difficulty in the parasite's life is the return to water. It is, therefore, of particular interest that the…"

"There is an extremely thin line of demarcation between the ferment and the parasite."

"I cannot persuade myself that a beneficent and omnipotent God would have designedly created the Ichneumonidæ with the…"

"Fell Oestrus buries in her rapid course Her countless brood in stag, or bull, or horse; Whose hungry larva eats its l…"

"The wing'd Ichneumon for her embryon young Gores with sharp horn the caterpillar throng. The cruel larva mines its si…"

"What keeps snails and flukes apart in evolution is their divergent future interests, and this is because they do not …"

"To choose a rough example, think of a thorn which has stuck in a finger and produces an inflammation and suppuration.…"