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HLTB21H3 (177)
Chapter 1

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University of Toronto Scarborough
Health Studies
Caroline Barakat

- Connect w/ Lec. 1 HLTA01- Chapter 1 - Legionnaires' disease:  distinctive symptoms: dry cough, chest pain, shortness of breath, vomiting, diarrhea  aspiration (secretions  lungs instead of stomach) of Legionella  result of growth + spread of Legionella through hotel's air-conditioning system - TSS (Toxic Shock Syndrome)  distinctive symptoms: conjunctivitis, confusion, fatigue, high blood pressure  low blood pressure  S. aureus  result of introduction of new tampons - SARS (Severe Acute Respiratory Syndrome)  distinctive symptom: difficulty in breathing  result of droplet secretions from nose and mouth  R v0lue of 3 - diseases erupt and spread throughout the world more quickly because of increased and rapid movements of people and goods - harm inflicted by parasites = disease - 3 kinds of bacteria: spherical (coccus), rod shaped (bacillus), corkscrew (spirillum) - malaria:  infected mosquito injects a dozen of thousands of parasites into host  each parasite invades a liver cell, each produces thousands of offspring  each offspring infects a red blood cell - hookworms:  attach and suck blood to/of lining of small intestine lining  female hookworms produce eggs - HIV (causing AIDS) virus  invades white blood cells  replicates - measles virus  distinctive symptoms: fever, weakness, loss of appetite, runny nose, tearing of eyes, rash  transmitted through air as fine mist from infected person  multiplies, invades white blood cells, and carried to all parts of body using bloodstream  recovery produces lifelong immunity - bacteria 1-5 um in size are prokaryotes, can be free-living or parasitic - protozoa 5-15 um in size are one-celled eukaryotes, can be free-living - bacteria and protozoa = micro-parasites - Connect w/ Lec. 1 - Mary Mallon/'Typhoid Mary' was a carrier (infection present even after disease symptoms have disappeared)
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