Tracheal sampling is a good way to determine if Mycoplasma hyopneumoniae (M. hyo) is present in a herd, but it’s an invasive procedure that can be difficult to accomplish. The procedure, however, may offer a valuable benefit, said Brandi Burton, DVM, swine veterinarian with Suidae Health and Production. The fluid from the tracheal sampling could become an alternative to the lung homogenate that has typically been used for animal inoculation in M. hyo control, she told Pig Health Today.