Yes, that looks like mealy bugs and yes, they could spread. But it does not yet appear to be a serious infestation and so should be relatively easy to treat. You can carefully swab down each leaf with a q-tip dipped in rubbing alcohol. Or you can use a horticultural oil, like Neem and spray the plant thoroughly.

I'll try the alcohol. I have some spinosad spray, but it doesn't say mealies on the label. I've never had these before and am not happy! I see some on my favorite echie also. Booooo!

Thank you.

Even soap will work on mealies. They're easy to smother and kill. But you will need several applications to get at every stage of those left in untreated crevices. Every 3 to 4 days for about a couple of weeks, even after you don't see them anymore. And at dusk so the treated plants are not exposed to light for at least 12 hours. If you're paranoid about leaf burn, cover them with thin cloth during the day. Or, what I do if PIG, a chair to shade them without creating more humidity in the plant.

Pagan

Thank thank you, Pagan.

Many spots look like fungal disease, but I can see some 'cottony mass' in one area which says mealy bugs. Be careful with using a soap (best would be castile soap - plant based) since soaps are designed to dissolve and could potentially harm leaves (I am sure seldom application would not kill them).

Pagans advice of protecting plants from sunlight while wet (from treatment) is very good.

Thanks, rina. I tossed the small semps, treated the one shown with alcohol and put it in quarantine in a pot!