ENVS 1126 Chapter : Envs 1 27 2015
Document Summary
To replace the good bacteria in your body that the antibiotic gets rid of. Helpful to humans for: supplying nutrients, priming our adaptive immunity, and protecting humans from pathogens. Normal flora may be diff in terms of the duration of their residence in our bodies. Transient flora persists for only relatively short periods. If you"re prone to a lot of cavities, blame your momma. Normal flora can play a protective role by preventing pathogen colonization. Common-source epidemic is characterized by a sharp rise to a peak then a rapid decline; usually arises from a single contaminated source (food or water) Propagated (person-to-person) epidemic is characterized by a slow and prolonged rise and then a gradual decline; usually results from intro of a single infected individual into a pop. John snow traced the source of cholera in england (1854) to the broad street pump. Accused and convicted of spreading disease in 1907.
