Sialidase activity varies widely among strains and tends to correlate with strain virulence in the avian pathogen Mycoplasma synoviae. To characterize the forms of selection acting on enzymes required for sialic acid scavenging and catabolism, the ratios of nonsynonymous (K(a)) to synonymous (K(s)) mutation frequency were calculated for codons in the sialidase gene of 16 strains of M. synoviae ...

The ability of Mycoplasma synoviae, an avian pathogen, to persist despite fluoroquinolone treatments was investigated in hens. Groups of Mycoplasma-free hens were experimentally infected with the M. synoviae 317 strain and treated twice with enrofloxacin at the therapeutic dose. The results show that the two treatments did not have any influence on this strain of M. synoviae recovery from trach...

Mycoplasmas are important  avian  pathogens,  which  can  cause  both  respiratory  disease  and  synovitis  in  poultry  that  result  in  considerable  economic  losses  to  the  poultry  industry  all  over  the  world.  The  aim  of  this  study  was  to  determine  the  prevalence  of  Mycoplasma  gallisepticum  and  Mycoplasma  synoviae  infections  among  commercial  poultry  flocks  in ...

An anaerobic avian mycoplasma was isolated from cell cultures infected with Marek's disease (MD) virus. The mycoplasma inhibited microplaque formation by MD virus. This inhibition could be partially reversed by increasing the arginine content of the culture. A similar inhibition was observed with Mycoplasma gallisepticum or M. synoviae, though reversal by arginine occurred only with M. gallisep...

The in vitro activities of aivlosin tylosin tiamulin, erythromycin, oxytetracycline, spectinomycin, lincomycin, lincomycin-spectinomycin (1:2) and enrofloxacin were determined against twenty-eight isolates of Mycoplasma gallisepticum and 4 isolates of Mycoplasma synoviae using microbroth dilution method. The isolates showed various susceptibilities to antimicrobial agents. Aivlosin, lincomycin-...

mycoplasma synoviae (ms) is an important avian pathogen that can cause both respiratory disease and joint inflammation synovitis in poultry, inducing economic losses to the iranian chicken industry especially breeder farms. the aim of this study was to use the ms specific pcr and culture methods in order to detect of m. synoviae from breeder farms where located in tehran province. a total of 47...

The role of chondrocytes in the development of infectious arthritis is not well understood. Several examples of mycoplasma-induced arthritis in animals indicate that chondrocytes come into direct contact with bacteria. The objective of this study was to analyze the interaction of an arthrogenic Mycoplasma synoviae strain WVU 1853 with chicken chondrocytes. We found that M. synoviae significantl...

BACKGROUD Mycoplasma synoviae (M. synoviae) is widely distributed around the world, and leads to serious economic losses in the world every year. Nevertheless, the incidence and epidemiology of M. synoviae infection in China have remained unclear. RESULTS In this study we demonstrate that over 9773 broiler chicken flocks in 16 Chinese provinces were affected by M. synoviae between 2010 and 20...

The “in house” PCR method and four commercial PCR kits (designed symbolically as A, B, C, and D) for the detection of Mycoplasma synoviae (MS) in tracheal swabs of infected experimentally SPF chickens were compared. The chickens were inoculated intranasally with 1x10 colour change unit (cfu)/mL of ATCC reference MS strain, and at 4, 7, 14, 28, and 35 d post infection (d.p.i.), the tracheal samp...

The annotation and comparative analyses of the genomes of Mycoplasma synoviae and Mycoplasma hyopneumonie, as well as of other Mollicutes (a group of bacteria devoid of a rigid cell wall), has set the grounds for a global understanding of their metabolism and infection mechanisms. According to the annotation data, M. synoviae and M. hyopneumoniae are able to perform glycolytic metabolism, but d...