What are the
pros and cons
of using antibiotics in animal feed?
Animals receiving antibiotics in their feed gain 4% to 5% more body weight than animals that do not receive antibiotics.
Antibiotics are used for
treatment of animal disease and/or disease prevention.
Livestock treated with antibiotics
than those who are not treated.
shelf life is extended
for meat, poultry, eggs, and dairy products when treated with antibiotics.
Widespread antibiotic use has led to
National Research Council
Institute of Medicine
panel has concluded that
antibiotic-resistant human diseases
have "clearly occurred" due to bacteria from antibiotic-treated livestock.
High doses of antibiotics
given to chickens leads to resistant
strains found in both meat and eggs. In 1983, this phenomenon was also demonstrated for low-level use of antibiotics in livestock.
Fluoroquinolones used in livestock animals can contribute to
increased resistance in foodborne bacteria
which can then infect humans. For example, the
Minnesota Health Department
found that 70% of the chicken meat samples they collected were contaminated with
, and that 20% of the infected meat carried a
Direct questions to the
of the page,