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Bio 1201 Class Notes

by: Madalyn Notetaker

Bio 1201 Class Notes BIO 1201

Madalyn Notetaker
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About this Document

These notes cover what we talked about in class on the topic of "cheap meat pt. 1"
Biology In Society I
James Barbee
Class Notes
antibiotics, antibiotic, resistance




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This 2 page Class Notes was uploaded by Madalyn Notetaker on Monday September 26, 2016. The Class Notes belongs to BIO 1201 at Appalachian State University taught by James Barbee in Spring 2016. Since its upload, it has received 26 views. For similar materials see Biology In Society I in Biology at Appalachian State University.


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Date Created: 09/26/16
Monday, September 26, 2016 Bio 1201: Cheap Meat Pt. 1 Farm Animals: How they are raised - Concentrated Animal Feeding Operation (CAFO): large amounts of animals in a small, confined space. • must be cleaned/disinfected frequently - Growth Promoters/Antibiotics • raising the animals in this closeness can cause stress on the animal and disease • low, sub-therapeutic(before potential sickness) doses • benefits: prevent disease, accelerate growth rate, more muscle mass, gain weight faster=ready for market faster • Used the most in U.S • animals: pigs, cattle, turkeys, chickens - Why sub-therapeutic? • stimulates good bacteria and inhibits bad bacteria • decreases inflammation - What kinds of antibiotics are used? ionosphores - 23% • • tetracycline - 28% • Animal use is higher than human use - 80% vs. 20% - Discovery of Penicillin • Albert Alexander - figured it out from moldy horse saddles but no one payed attention to him • Alexander Fleming - accidentally discovered it and was noticed • fungus on plate was inhibiting reproduction of bacteria • animals gain antibiotic resistance 1 Monday, September 26, 2016 - this resistance can spread through the resistant bacteria in feces runoff/through farm workers How do antibiotics target bacterial cells? - antibiotics/ penicillin target the cell wall • disrupts the formation of the new cell wall causing it to become weak • water rushes in and the cell then ruptures because of swelling like a water balloon - also target the ribosomes of the cell • ribosomes = protein synthesizers • antibiotics disrupts protein making • works in prokaryotic cells but eukaryotic cells are left unaffected because they have a slightly different structure Risks of using Growth Promoters - Since it is used so much the livestock have developed resistance to the antibiotic and could impact the effectiveness of human antibiotics 2


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