Evaluation of two commercial assays for the detection of Chlamydophila abortus antibodies.

Two commercial enzyme-linked immunosorbent assays (ELISA), the CHEKIT-CHLAMYDIA which uses inactivated Chlamydophila psittaci antigen, and the Chlamydophila abortus ELISA produced by the Institut Pourquier which uses a recombinant fragment of the 80-90 kDa protein, were evaluated with the objective to determine whether the new ELISAs would perform as improved alternatives to the complement fixation test (CFT) for the serological diagnosis of ovine enzootic abortion (OEA). The results were compared to those obtained by the CFT and the competitive ELISA (cELISA). The tests were assessed with a panel of 17 serum samples from specific pathogen-free (SPF) lambs experimentally infected with various subtypes of Chlamydophila pecorum, with sera from 45 C. abortus-infected pregnant sheep and from 54 sheep free of OEA. The C. abortus ELISA was identified as being more specific and sensitive than the other tests. The 4 assays were evaluated further with 254 sera from flocks with documented OEA, from flocks with no history of abortion and from animals after abortion of unknown cause. The C. abortus ELISA by the Institut Pourquier identified less OEA-positive sera than the other assays though it identified correctly 9 of 10 OEA-positive flocks. The basis of the discordant results is discussed.

Ear-nose-throat manifestations of autoimmune rheumatic diseases.

Ear-nose-throat (ENT) manifestations of connective tissue disorders represent a diagnostic challenge for clinicians as they often constitute the initial sign of an otherwise asymptomatic autoimmune disease. Moreover, in patients with known autoimmune rheumatic diseases, ENT manifestations can be overlooked. Hearing disturbances may be seen in patients with systemic lupus erythematosus, Wegener's granulomatosis, relapsing polychondritis, polyarteritis nodosa, Cogan's syndrome, Sjögren's syndrome, and less frequently in Churg-Strauss syndrome and Adamantiades-Behçet's disease. Nose and paranasal sinuses are variably affected during the course of Wegener's granulomatosis, Churg-Strauss syndrome, relapsing polychondritis and sarcoidosis. Recurrent mucosal ulcerations are common in systemic lupus erythematosus and Adamantiades-Behçet's disease. Xerostomia is a common feature of primary and secondary Sjögren's syndrome; salivary gland enlargement may be also seen in these patients, as well as in patients with sarcoidosis. The cricoarytenoid joint can be involved during the course of rheumatoid arthritis, ankylosing spondylitis and gout; osteoarthritic changes have also been described. Motility disorders of the upper and/or the lower portions of the esophagus have been reported in patients with dermatomyositis/polymyositis, systemic sclerosis and systemic lupus erythematosus. Trigeminal nerve dysfunction may occur in patients with Sjögren's syndrome, systemic sclerosis, systemic lupus erythematosus and mixed connective tissue disease. Peripheral facial nerve palsy has been described to complicate the course of Sjögren's syndrome and sarcoidosis.