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Unformatted text preview: responsible for causing AIDS, the E. coli 0157:H7 bacterium is a newly emerged
pathogen whose spread has been facilitated by recent social and technological changes. E. coli 0157:H7 was first isolated in 1982; HIV was
discovered the following year. People who are infected with HIV can appear healthy for years, while cattle infected with E. coli 0157:H7
show few signs of illness. Although cases of AIDS date back at least to the late 1950s, the disease did not reach epidemic proportions in the
United States until increased air travel and sexual promiscuity helped transmit the virus far and wide. E. coli 0157:H7 was most likely
responsible for some human illnesses thirty or forty years ago. But the rise of huge feedlots, slaughterhouses, and hamburger grinders seems
to have provided the means for this pathogen to become widely dispersed in the nation’s food supply. American meat production has never
before been so centralized: thirteen large packinghouses now slaughter most of the beef consumed in the United States. The meatpacking
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This note was uploaded on 02/25/2014 for the course MGMT 120 taught by Professor Litt during the Spring '08 term at UCLA.
- Spring '08