Textbook Notes (368,497)
Canada (161,927)
HLTB21H3 (177)
Chapter 1

The Nature of Plagues and the Price of Being Sedentary -Ch.1 and 2.docx

4 Pages
Unlock Document

Health Studies
Caroline Barakat

Prashanthan Sep/13/2012 The Nature of Plagues and the Price of Being Sedentary Ch. 1  Plague: The sudden increase in a number of people in a population affected by a disease.  Epidemiologist: are disease forecasters who study patterns in the spread and control of a disease by using statistic data and mathematical modeling also used to identify the causes, modes, and likelihoods of the disease transmission. R0  For an infection to persist it must transmit the infection to someone else. The number of individuals infected by an infected person i0 R .  The longer someone is infected and the greater number of contacts the greater the value of0R and the faster it will spread Epidemics  Type 1: pop is large, pattern shows regular outbreaks, and it never completely disappears.  Type 2: peaks are discontinuous, regular occurrences.  Type 3: occurs in smaller communities, increased # of cases, and long periods of time with no cases. Evolutionary Fitness  The success of the individuals passing of genes to future generations, through survival and reproduction. Legionnaires’ Disease  Symptoms: high fever, chills, headache, muscle aches, dry cough, chest pains, breath shortness, diarrhea, vomiting o Within 1 week, lungs filled with fluid & pus, confusion, disorientation, hallucinations, memory loss  Caused by Legionella  Infected water sources evaporate into small water droplets o Legionella inside water droplet breathed in  Taken in through aspiration o Protective mechanisms preventing aspiration defective in smokers, elderly, and lung disease ppl Toxic Shock Syndrome  Symptoms: vomiting, high fever, lightheadedness, sore throat, muscle aches. Prashanthan Sep/13/2012 o 3-4 days later: rash on thigh, blood-shot eyes, cool/moist skin, rapid heart rate, sudden drop in blood pressure, rapid breathing, fatigue o Low blood pressure eventually leads to circulatory collapse, causing shock  Gender-specific STI (sexually transmitted infection)  Caused by Staphylococcus aureus  Linked to tampon brand (bacteria breeding ground) o Caused reflux of blood and bacteria into vagina Severe Acute Respiratory Syndrome (SARS)  Symptoms: headache, dry cough, sore throat, fever  Transmission: droplet secretions from nose and mouth (direct)  Highly contagious Ch.2  Africa was home to humanity  The earliest evidence of hominids were unearthed 4.2 million years ago, they split from apes and were called Australopithecus Anamensis  Evidence of an erect upright posture was found in Ethiopia and Tanzania 3.8-3.0 million years ago in the A.afarensis Australopithecus Anamensis  The descent from trees freed them of some diseases, yet introduced them to others, such as ticks, flies, and other “ bloodsucking parasites” Australopithecus Boisei  Originated around 2.5-1.8 million years ago , appearing in fossil record with several other hominids such as the Homo habilis  Small-brained vegetarians Homo Habilis  The Homo habilis aka the “handy man” was a scavenger and used simple stone tools.  The species had contact with diseases as they were nomadic allowed interactions
More Less

Related notes for HLTB21H3

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.