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Infection and Immunity, December 1998, p. 6004-6009, Vol. 66, No. 12
Department of Animal Science, Biotechnical
Faculty, University of Ljubljana, 1230 Dom
Received 21 May 1998/Returned for modification 22 July
1998/Accepted 24 September 1998
Inoculation with hemagglutination-positive (HA+)
cultures of Mycoplasma synoviae AAY-4 induced acute
synovitis significantly more frequently (P = 0.001) in
chicken tibiotarsal-tarsometatarsal joints than did inoculation with
HA-negative (HA
0019-9567/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
The Hemagglutination-Positive Phenotype of Mycoplasma
synoviae Induces Experimental Infectious Synovitis in Chickens
More Frequently than Does the Hemagglutination-Negative
Phenotype
ina,1,*
ale,
Slovenia,1 and
Department of Avian
Medicine, College of Veterinary Medicine, University of Georgia,
Athens, Georgia 30602-48752
) cultures derived from the same clone of
AAY-4. Immunoblotting analyses showed that HA+ cultures
abundantly expressed two phase-variable hemadherence-associated surface
membrane proteins of 53 kDa and 48 to 50 kDa defined by monoclonal
antibodies. HA
cultures lacked the 53-kDa proteins and
synthesized truncated 27- to 30-kDa forms of the 48- to 50-kDa
proteins. Inoculation of cyclosporin A (CsA) into infected joints
significantly decreased the frequency of acute synovitis
(P = 0.001). Moreover, repeated intra-articular
inoculation of CsA (three doses of 1 mg at 2-day intervals)
significantly reduced the local antibody response to M. synoviae in the joints treated with CsA.
*
Corresponding author. Mailing address: Department of
Animal Science, Biotechnical Faculty, University of Ljubljana, 1230 Dom
ale, Slovenia. Phone: (386 61) 717 809. Fax: (386 61) 721 005. E-mail: dusan.bencina{at}bfro.uni-lj.si.
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