If it were me I'd take them out ASAP and put them in isolation and treat with a gram+/- broad range antibiotic. Amoxacillin perhaps? http://www.jefferspet.com/ssc/product.asp?CID=0&pf_id=1441 Are they fighting alot or stressed for any reason? Or recently add something new?
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If its cauliflower, I don't know, there isn't much you can do for viral infections.
*edit*
If its cauliflower, I don't know, there isn't much you can do for viral infections.