MELS223 Lecture 1

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Medical Laboratory Science
Course Code
Jenny Rhodes

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MELS223 Lecture 1 11/07/13 Epidemiology Occurrence, distribution and determinants of health and disease in a population.  How many, who, when, where, risk factors? Is a disease infectious (microbial) ? Questions : containment, how to treat the patient Thought it was radioactive discharge but levels were too low to be causing cancer. Next theory : was a virus. Virus is part of the cause of cancer. 30 years later: Epidemiological findings showed both theories were wrong. Fathers that worked at nuclear powerplant had twice the risk of cancer. At high exposures: risk factor 6.42 Defective sperm! If conclusion was virus, then preventative measures would have been very different- vaccine Streptococcus agalactiae (Lancefield group B): GBS  Bovine pathogen : milk associated disease  1970 – neonatal pathogen  Caused – meningitis, pneumonia, bone and joint infec
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