Mycoplasma hyorhinis

• M. hyorhinis, Strep suis, H. parasuis signs are similar because these organisms all can cause polyarthritis and polyserositis.
• M. hyorhinis generally occurs in 3 to 10-week-old pigs becoming unthrifty, with roughened coat, slight fever, difficult movement, swollen joints, and lameness with duration up to 14 days.