I had several plants that with same symptoms, which all eventually died within some weeks: Formation of blisters along stem (no picture) and leaf veins, that seem to pop up (assumption) and make everything around sticky. The disease started with citrus plants (diverse limes) that I bought.
I thought it must be a some microorganism, but strangely close-up pictures resemble some flea-like morphology of the blisters, which makes me so curious that I ask this question. The plant leafs are Kaffir limes, approximately 6 cm long.
Also, would you have any idea how to save my plants?