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Airsacculitis in Turkeys Exposed to Mycoplasma synoviae Membranes

K. R. Rhoades
Avian Diseases
Vol. 31, No. 4 (Oct. - Dec., 1987), pp. 855-860
DOI: 10.2307/1591042
Stable URL: http://www.jstor.org/stable/1591042
Page Count: 6
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Airsacculitis in Turkeys Exposed to Mycoplasma synoviae Membranes
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Abstract

In studies to investigate the pathogenesis of mycoplasmal airsacculitis, exudative lesions were produced in turkeys by intra-air-sac inoculation with Mycoplasma synoviae cell membranes and viable organisms. Membrane inocula containing 5 mg of protein produced more severe lesions than inocula containing either 2.5 mg or 1 mg protein. Turkeys exposed to 5 mg of membrane protein developed moderately severe airsacculitis; those exposed to viable organisms developed markedly severe airsacculitis. Microscopic examination revealed that membrane-induced lesions were generally similar to those resulting from infection but were less severe. At the termination of the study, 8 days after exposure, M. synoviae was isolated from respiratory tract tissues of all turkeys exposed to live organisms, but it was not isolated from any of those exposed to membranes or from unexposed control turkeys. Antibody against M. synoviae was demonstrated with the tube agglutination test in sera from turkeys exposed to membranes and those exposed to live organisms, but it was not demonstrated in sera from unexposed control turkeys. /// En estudios para investigar la patogenesis de la aerosaculitis por micoplasmas, se produjeron lesiones exudativas en pavos mediante la inoculación en el saco aéreo con membranas de Mycoplasma synoviae y con organismos viables. El inóculo de membranas que contenía 5 mg de proteína produjo lesiones más severas que el inóculo con 2.5 o 1.0 mg de proteína. Pavos expuestos a 5.0 mg de proteína de membrana desarrollaron aerosaculitis moderadamente severa mientras que los expuestos a organismos viables desarrollaron aerosaculitis marcadamente. El examen microscópico reveló que las lesiones inducidas por la proteína de las membranas fueron generalmente similares a las que resultaron de la infección, aunque menos fuertes. Al término del estudio, 8 días después de la exposición, se aisló M. synoviae de los tejidos del tracto respiratorio de todos los pavos expuestos a los organismos viables y no se aisló de los pavos expuestos a las membranas o de los controles no expuestos. En los pavos expuestos a las membranas y a los organismos viables se demostró la presencia de anticuerpos contra M. synoviae mediante la prueba de aglutinación en tubo. No se encontraron anticuerpos en los pavos no expuestos.

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