Thank you for posting such a good survey of bovine mastitis. I have been interested in the subject for quite a few years. I once tried to get a company to do a test of a vaccine they were developing to see if there was an economic benefit from treating cows with it, but they were no interested "We are not an animal products company" the CEO said.
Recently, I have been trying to get the makers of n OTC nasal spray which I think works very well on humans to do a test of spraying their product on the noses of cows to reduce their infection rate. Should be very cheap to do this. I don't know what sort of FDA or other regulations have to be met to do this. The company [SinoFresh] has very little money though, not sure they will do it.
Maybe it has already been tried and did not work. From personal experience I think it is the best nose spray out there.
Norman
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