nearly every juvie umbee i have seen in the uk has had or been exposed to lympho.
i am the person who swordtail was going to get the male from , i did not try and tell him it is normal but told him that the incidence on umbee's here in the uk is very high , and was at least honest enough to tell him about it.
trouble being virtually every fish that has been through a wholesalers that has centralised filtration has been exposed to it seeing as there is no way of stopping it, so can any of you that have bought your fish from a lfs say for definate that your fish has not been exposed to it, i very much doubt it.
so as more fish species are exposed to it through the filtration systems of major wholesalers expect to see it appear on many more species that are susceptible to it.