The authors report finding arthritogenic agents, mycoplasmas, for the first time in a large group of captive elephants that are frequently crippled with rheumatism.
Clark, H. W., Laughlin, D. C., Bailey, J. S., & Brown, T. P. (1979). Isolation of mycoplasma from the genital tracts of elephants. Elephant, 1(3), 9-10. Doi: 10.22237/elephant/1491420344