PUBHLTH 1 Lecture 4: Week 4 Lecture
Document Summary
First recognized in us in 1981 now a world-wide killer. Caused by retrovirus (copying rna into the dna of the cell) After exposure: mid flu-like symptoms, weeks easily transmitted. Virus hidden in the dna of the t4 cells, person quite healthy, less likely transmit. Window: initial 2 month-period after infection, false sense of security. Now, many drugs are available but no cure. Spread in human populations due to disruptions of traditional lifestyles. Spread to western countries due to changing patterns of sexual behavior and international travel. Ebola, monkey px, west nile virus, sars. Factors that lead to emergence of new infectious. Breakdown of social restraints on sexual behavior and intravenous drug use. Human activities that cause ecological damage and close contact with wildlife. Killed 20 million to 40 million from 1918-1919. Lyme disease: reservoir is mouse, deer tick feeds, infected dear tick. Leading cause of infectious-disease death worldwide; of world pop infected. There was resurgence in us early 1990s.
