BIOL1300 Lecture Notes - Lecture 56: Hiv Vaccine, World War I, Grain Elevator
29 May 2017
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Document Summary
Pandemic: an outbreak of disease over a very large area; affecting a large proportion of a population. Easier to spread in an urbanized world. Viruses and bacteria continually evolving (to survive vaccinations) People used to believe that smells caused pathogen transmission. Bubonic plague : a bacterial illness that caused massive pandemics in the ancient and. Influenza : caused a 1918 pandemic, and still threatens today. Hiv/aids : a pandemic that is difficult to solve socially and medically, and is still a significant issue. Feed on rats or wild rodents transmit bacteria. A: animal vector (spread by fleas that feed on rats); zika is caused by a virus spread by mosquitoes. However, when large numbers of rats die, the fleas will seek other hosts, and can infect humans. Grain storage and weather conditions caused rat boom/bust cycles. Both rats and juvenile rat fleas eat grain. Large amounts of grain stored in granaries. Grain stores were relatively easily accessed by rats.
