MBIO 3010 Lecture Notes - Lecture 8: Lassa Fever, Yellow Fever, Q Fever
17 Nov 2016
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Successful pathogen -> transmission (leave the host and infect a new host) Shed from body surfaces or extracted via insects. More successful that organisms that don"t cause these, its the fastest way to travel to another host - large numbers are shed at one time. Resistance to desiccation and theorem inaction (spores/cysts) Shigella only needs a few to infect, which makes it more infectious. Hiv is very unstable in the environment, not very infectious disease because it needs direct contact. Host types - infects more hosts then its more infectious. Dif cult to control as social factors are involved. Brucellosis, rabies, q fever, lassa fever, salmonellosis. Other sources: tissues, hands , other surfaces. Recycling of fecal material back to mouth more common in resource-poor countries. After 19th century, adequate sewage disposal - puri ed water. England, 200 years earlier, no ush toilets and sewage disposal so most drinking water was contaminated - cholera and typhoid.
