Mycoplasmas in the etiology of multifactorial respiratory disease

The avian mycoplasmas pathogenic for commercial poultry, Mycoplasma gallisepticum and Mycoplasma synoviae in chickens and turkeys, and Mycoplasma meleagridis and Mycoplasma iowae in turkeys are egg-transmitted infections and exhibit wide variations in clinical manifestations. Mycoplasma gallisepticu...

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Bibliographic Details
Published in:Poultry science 1998-08, Vol.77 (8), p.1146-1149
Main Author: Kleven, S.H. (University of Georgia, Athens, GA.)
Format: Article
Language:English
Subjects:
Animals
ANTIGENE
ANTIGENOS
ANTIGENS
CHICKENS
DINDON
ENFERMEDADES RESPIRATORIAS
Environment
EPITOPES
IMMUNE RESPONSE
MALADIE RESPIRATOIRE
MIXED INFECTIONS
MYCOPLASMA
Mycoplasma - classification
MYCOPLASMA GALLISEPTICUM
Mycoplasma Infections - classification
Mycoplasma Infections - prevention & control
Mycoplasma Infections - veterinary
MYCOPLASMA IOWAE
MYCOPLASMA MELEAGRIDIS
MYCOPLASMA SYNOVIAE
PATHOGENESE
PATHOGENESIS
PATHOGENICITY
PATOGENESIS
PATOGENICIDAD
PAVO
POLLO
POULET
Poultry Diseases - classification
Poultry Diseases - microbiology
Poultry Diseases - prevention & control
POUVOIR PATHOGENE
REPONSE IMMUNITAIRE
RESPIRATORY DISEASES
Respiratory Tract Infections - classification
Respiratory Tract Infections - prevention & control
Respiratory Tract Infections - veterinary
RESPUESTA INMUNOLOGICA
TURKEYS
VIRULENCE
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Summary:The avian mycoplasmas pathogenic for commercial poultry, Mycoplasma gallisepticum and Mycoplasma synoviae in chickens and turkeys, and Mycoplasma meleagridis and Mycoplasma iowae in turkeys are egg-transmitted infections and exhibit wide variations in clinical manifestations. Mycoplasma gallisepticum strains vary widely in virulence, tissue tropism, and antigenic makeup and have the ability to alter the expression of major surface antigenic proteins. Although less well studied, strains of M. synoviae, M. meleagridis, and M. iowae appear to exhibit similar variability. Intraspecies variability among mycoplasma strains and their ability to interact with other disease-producing factors explain the wide variability of clinical manifestations, difficulties in diagnosis, their ability to persist within the host for long periods of time, and many of the difficulties involved in control and eradication programs. Mycoplasmas are also well known for their interactions with other infectious agents and environmental factors in producing clinical disease. Control of the clinical manifestations of Mycoplasma infections is simplified when concurrent infections are minimized and optimum environmental conditions are provided
ISSN:0032-5791
1525-3171
DOI:10.1093/ps/77.8.1146