That is quite serious. Do they sell Sera over there? Baktopur would treat it, maybe you can find something like that?
I have never had diseased paros. The boraras I kept with them one time had whte spot and later died of fungus, but the paros never had any symptoms. One time in an other tank, when some peat I put under the sand for the cryptos, started rotting I lost some Betta, but when I changed a lot of water the paros were more coloured than ever and even starded courting. Although they won’t come in contact with these in nature they seem to have an excellent immune system.