Editor's Note: This week, we start a series in the TDN where we attempt to clarify a HISA regulation that has been the subject of confusion in the early days of the rollout. This week, we discuss the test barn, where we have received letters to the editor saying that sample collection personnel may not be practicing proper hygiene, nor wearing gloves. What do the rules say, and what should you do if you observe this? HISA CEO Lisa Lazarus answers us below. Sample collection procedure requirements in the test...