Chopo cost 249 pesos and require 10 business days or 2 weeks for the results. The lab on Colon in Ajijic charges 300 pesos and give you results in 4 to 5 days. I have used both but use the one on Colon because I don't want to wait 2 weeks. The lab on Colon is at 4B, phone # 766-1086.