Mycoplasma gallisepticum and Mycoplasma synoviae in Turkeys in Poland

Olimpia Kursa1, Grzegorz Tomczyk1, Agata Sieczkowska1

  • 1Department of Poultry Diseases, National Veterinary Research Institute, 24-100 Puławy, Poland.

PubMed

Insights

Pathogenic Mycoplasma gallisepticum (MG) and M. synoviae (MS) cause significant poultry losses. This study investigated their prevalence and molecular epidemiology in Polish turkey flocks, finding MG in 8.33% and MS in 9.72% of broiler flocks.

Area of Science:

  • Veterinary Microbiology
  • Poultry Pathology
  • Molecular Epidemiology

Background:

  • Pathogenic mycoplasmas, including Mycoplasma gallisepticum (MG) and M. synoviae (MS), are major threats to the global poultry industry.
  • These bacteria cause significant economic losses through chronic respiratory disease, reduced growth, and decreased egg production and hatchability.

Purpose of the Study:

  • To investigate the prevalence and molecular epidemiology of MG and MS in turkey flocks in Poland.
  • To identify co-infections with other potential bacterial pathogens that may exacerbate mycoplasma-induced diseases.

Main Methods:

  • Collection of tracheal samples from 144 turkey broiler flocks and 40 turkey breeder flocks between 2015 and 2023.
  • Detection and quantification of MG and MS using real-time PCR targeting specific genes (16S rRNA, mgc2 for MG; 16-23S rRNA, vlhA for MS).
  • Molecular characterization through PCR and sequencing, including phylogenetic analysis of isolates. Identification of other bacterial pathogens using additional tests.

Main Results:

  • Mycoplasma gallisepticum was detected in 8.33% of turkey broiler flocks, and M. synoviae in 9.72% of turkey broiler flocks.
  • Phylogenetic analysis indicated MG isolates were predominantly ts-11-like strains, while MS isolates were similar to strains associated with EAA (Enzootic Aviary Adenitis) in laying hens.
  • Co-infections with secondary bacterial pathogens such as Ornithobacterium rhinotracheale, Gallibacterium anatis, Enterococcus spp., Staphylococcus aureus, and Riemerella anatipestifer were identified.

Conclusions:

  • MG and MS are prevalent in Polish turkey broiler populations, with distinct genetic profiles suggesting potential sources of infection.
  • The presence of secondary bacterial pathogens may significantly increase the severity and impact of mycoplasma infections in turkeys.
  • Molecular surveillance and characterization are crucial for understanding the epidemiology and controlling these economically important poultry diseases.

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