Neon tetra disease

[ima06001]

I bought some neon tetra the other day....dying like crazy. They swim erratically at night and they eventually develop white stripes...im pretty sure its neon tetra disease. Is it true that there's no cure? Is this disease going to affect the rest of the fish in my tank?

3 sunset platy
2 cory catfish
1 silver molly
2 rams
1 bn pleco
1 sewellia