Anyway, I don't think is dust is the cause for the cirrular abberation.
It seems more like the light source from those little tiny bulds or the light being bend from the reflect from some other source. If you look at your pic with those tiny light souce turned off, or taking photos away from those sources, the effect of the cirrular abberation is very low.
My suggestion, is that you take a pictures of other site/scene to determine if it is the cause of your camera or the site itself.
Look like backscatter. That's light from a flash or strobe reflecting back from particles in the lens's field of view causing specks of light to appear in the photo. This happen more offen in underwater photgraphy as is it more likely to have suspended particulars in water.