Dear M Safaan
there is nothing you can do other than let it boil out. It is highly contagous and those who never had it, might get it. Those who ever had it dont get it again.
We dont even inoculate for it, had bad results with such, but did nothave any for 20 years.
Watch the discharge, if it is strangles, it will look greenish eventually.Ask your vet if penicillin willhelp. We say, as our vets, as long as the horse eats, its not too bad.
The horses affected might get swelling in which is puss, in their face, around the neck/jawls and sometimes this has to be lanced in order to let the puss flow out.
Watch that it does not effect the breathing area, because there it can strangle, cut the air off. there are also what is called here "Bastard strangels". These are more dangerous, go through the entire body and often horses die on it. You will see swelling between the front leg area at the chest..etc.
Some horsemen say" thanks God my horse has the strangles, once it is gone we dont have to worry anymore". They worry that often it can happen just before the show season, that's what they mean. We too.
Just keep a watch on it and ask your Vet what else to do. Try not to let them out with other horses and disinfect the stalls regularly- wash them down.Wash your hands with disinfectant before you touch anythingelse or another horse.
And keep the nostrils of the horses clean and clear, wash as often as you can, but throw the cloth away in a sealed garbage bag you will burn.
Good luck and may God be at your side and your horses always!.
Serenity Arabian Farms