Specifically, he was losing the war against the diagrams. For the last three hours, he had been trying to memorize the complex lifecycle of Schistosoma mansoni . He needed the definitive resource, the bible of Brazilian parasitology: the Neves textbook. He had a physical copy, but it was at his apartment, forty minutes away by bus, and his notebook was open to a page where the ink had smeared into an indecipherable grey blob during a coffee accident earlier that morning.
The life cycles of parasites vary significantly, influencing their transmission and control. Some parasites, like Giardia , have a simple life cycle with two stages (cyst and trophozoite) and are transmitted via the fecal-oral route. Others, like Plasmodium , require two hosts (humans and mosquitoes) to complete their life cycle. parasitologia humana neves 14 edicao pdf fixed