Field Isolates of Mycoplasma ovipneumoniae Exhibit Distinct Cytopathic Effects in Ovine Tracheal Organ Cultures. - Niang, M.; Rosenbusch, R.F.; DeBey, M.C.; Niyo, Y.; Andrews, J.J.; Kaeberle, M.L. (Journal of Veterinary Medicine Series A, 1998)