Zoologix also offers PCA testing for mycoplamsa gallicepticum, and up to 7 other respiratory diseases to collect at home and mail in to them. Here is a link for them:
https://www.zoologix.com/avian/Datasheets/PoultryRespiratoryPanel.htm
https://www.zoologix.com/avian/Datasheets/PoultryRespiratoryPanel.htm