BIOL449 Final: Biol 449 Exam Review.docx
22 Apr 2014
School
Department
Course
Professor
Document Summary
Cdc defines emerging and re-emerging infections as those whose incidence in humans has increased within the past 3 decades or whose incidence threatens to increase in the near future. Re-emerging tb; has been in human history before and threatens to come back again. There has been a rise since the 40s. Wit the availability of antibiotics, immunization etc people thought infectious diseases could disappear. Emergence of antibiotic-resistant strains of pathogens picking up resistance genes undergone mutations. Serotype o139 new strain; can cause epidemic cholera. Evolved from o1 source of pandemics but recently it evolved to o139. Closely related, but capsule & altered o antigen. They tried to terminate it, developed antibiotics but that stopped working in the 70s. Aids destroys immune system, tb can thrive (immune system is destroyed) In 1989 cdc started strategic plan for the elimination of tb in the us. More aggressive treatment tb rates started declining again. The plan: aggressively identify, treat people with high-risk groups.
