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So there is no MRSA or equivalent in the equine world??
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Not really, although it's certainly something the veterinary world has kept a close eye on, obviously, due to what's happened in human medicine over the years.
There have been problems within some equine hospitals regarding nasty salmonella species, and some small animal hospitals have had environmentally-specific nosicomial infections that take attention and care to eradicate. But no super-super bugs have developed out of that yet, thank goodness.
I think it's probably because animals generally have different epidemiologic considerations than humans, fortunately, it is much more difficult for them to 1) spread antibiotic-resistent bugs around, as unlike humans they are not out and about exposing 20 or 100 others after having taken only half of their prescribed antibotic dose; 2) rarely do animals get prescribed antibotic in their lives compared to humans, 3) sick herd animals are more often euthanized than treated
The worse and most common veterinary antibiotic misuse in my experience has been (in referral patients) vets who have prescribed a variety of different antibiotics for an escalating non-responsive infection that is fungal; and repeated antibiotics prescribed for "urinary tract infections" that are not.
The very common canine skin staphs are still quite sensitive to the cephalosporins, and the derm world hasn't reported any resistence problems appearing yet.
Believe it or not, the way herdsmen (cattle) tend to throw antibiotic at anything with a runny discharge, and considering the use of antibiotic in swine and poultry operations, resistence hasn't developed (although what's in our food chain is another story).
That's all I can think of at the moment
