spondylarthritis: arthritis that affects one or more of the intervertebral joints in the spine
state: the way something is with respect to its main attributes
solanaceae: large and economically important family of herbs or shrubs or trees often strongly scented and sometimes narcotic or poisonous; includes the genera Solanum, Atropa, Brugmansia, Capsicum, Datura, Hyoscyamus, Lycopersicon, Nicotiana, Petunia, Physalis, and Solandra