ENVS 1126 Lecture Notes - Lecture 25: Waterborne Diseases, Human Microbiota, Superinfection
23 Nov 2016
School
Department
Course
Professor
Document Summary
Infectious: capable of invading a host and producing illness. Insects: animals (including humans, food, water, sediment. Resident flora persist for relatively long times, often colonizing early in life and persisting until death (plus passing on from parent to offspring). Waterborne human pathogens: who, cdc: waterborne disease #1 killer of people worldwide. > war + terrorism + wmd: 3. 4 million deaths / year, globally, mostly developing countries, mostly children, cause: access to clean water, 900,000 infections, 900 deaths / year in u. s, exposure to pathogens. Mostly consumption of fecally contaminated waters (salt, fresh, drinking) Mostly gastrointestinal diseases, some respiratory, skin, blood. Incubation period usually 4-5 days uremic syndrome (hus: enterotoxigenic e. coli (etec, produce shiga toxin, diarrhea, cramps, nausea; vomiting and fever less common. Incubation period usually 6-48 hours: enteroinvasive e. coli. Incubation period variable: diarrhea (may be bloody), fever, cramps. Invades colon cells; rare in u. s: enteropathogenic e. coli.
