Königsweg 63
14163 Berlin
+49 30 838 62676
gefluegelkrankheiten@vetmed.fu-berlin.de
Infections with Mycoplasma spp. are of great economic importance for commercial poultry. Mostly, infection with Mycoplasma spp. is inapparent and does not cause clinical signs, but they predispose to infection with other pathogens. Alone or together with these pathogens, they are responsible for a drop in egg production, poor feed conversion, decreased growth rates, high condemnation rates at slaughterhouses, increased medication costs, and impaired reproductive performance. Mycoplasma spp. are nearly ubiquitous and difficult to control; great efforts have been made and are still made to obtain mycoplasma-free flocks by cleaning the production chain from the top of the production chain. For poultry, M. gallisepticum (MG), M. synoviae (MS), M. meleagridis (MM), and M. iowae (MI) are the most relevant species. MG infections are often called “chronic respiratory disease (CRD).” MS can cause inflammation of the air sacs, synovitis, tenovaginitis, and a drop in eggshell quality. Vertical transmission of MM and MI can be responsible for airsacculitis and bone deformations. The diagnosis is based on the clinical signs, postmortem lesions, PCR, and bacteriological and serological examinations. Prevention of mycoplasma infections includes eradication programs in breeder flocks, accompanied by strict hygienic measures and vaccination.