by Julie Fidler, Natural Society:
In a new study, researchers found that repeated treatments with antibiotics increased the risk of Type 1 diabetes in the rodents. 
The finding is harrowing, considering that approximately half of all prescriptions written for antibiotics in the United States are inappropriate and that a recent study found that antibiotics are prescribed to children about twice as often as they should be. 
For the study, Martin Blaser, M.D., a professor of translational medicine and microbiology at the NYU Langone Medical Center in New York City, and colleagues looked at the effects of antibiotics on non-obese mice that were susceptible to type 1 diabetes. The mice were very young – about the equivalent of a 6-months-old or 1-year-old child.
The mice were given either three doses of antibiotics at different times (pulsed therapy) or a steady but very low dose of antibiotics. Mice given no antibiotics served as controls.
The researchers found that the mice who received the pulsed therapy were twice as likely to develop type 1 diabetes as the mice that received no antibiotics.
Other findings included alterations to the microbiome in the gut, which led to changes in T cells. The T cell changes, in turn, led to increased inflammation in the insulin-producing islet cells of the pancreas.
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