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Detection of Mycoplasma synoviae Infection in Broiler Breeder Farms of Morocco Using Serological Assays and Real Time PCR

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Journal of Life Sciences 2014年第10期8卷 815-821页

作者： nassik saadia Aboukhalid Rachid Azzam Falak Rahmatallah Naoufal Lahlou-Amine Idriss Fassi-FihriOuafaa El Houadfi Mohammed Avian Pathology Unit Department of Pathology and Veterinary Public Health Agronomy and Veterinary Institute Hassan IIRabat 10000 Morocco Immunology and Biochemistry Laboratory Faculty of Sciences Mohamed V-Agdal University Rabat 10000 Morocco University Mohammed V Souissi Mohammed V Military Teaching Hospital Research and Biosafety Level 3 Laboratory Rabat10000 Morocco Microbiology Immunology and Infectious Diseases Unit Department of Pathology and Veterinary Public Health Agronomy andVeterinary Institute Hassan II Rabat 10000 Morocco

Mycoplasma synoviae （MS） is an economically important pathogenic agent of chickens, causing air sacculitis and synovitis. The diagnosis and monitoring of M. synoviae infection is usually made using serological assays, while confirmative diagnosis is made by isolation and identifcation of the organism, because of the cross reaction between M. gallisepticum and M. synoviae. This study was conducted from 2011 to 2013 during which l l broiler breeder flocks were sampled. These farms were located in all regions of morocco, The sampling was conducted as follows： Farms were visited on day one old chicks ＂day of importation from Europe＂. 20 to 60 ＂chicks＂ were randomly sampled. At the age of 8, 16, 32 and 56 weeks, 60 blood samples and 60 tracheal swabs were collected at each sampling. The serological screening was performed using Rapid Slide Agglutination （RSA） according the OIE protocol and Indirect EL1SA （IDEXX） according the manufacturer＇s instructions. The molecular diagnosis was performed using a commercial kit of a duplex real time PCR （Life Biotechnology）. The results revealed that one day old chicks were negative to MS by RSA and PCR, however they have a variable stock of maternal antibodies （Ig-Y） detected by iELISA. The seroprevalence found by RSA is variable and increase with the age （Sth week： 55%, 16th week： 91%, 32tb and 56th week： 100%）, the same profile was traced by PCR （Sth week： 36%, 16th week： 64%, 32th week： 82%, 56th week： 100%）, however, all farms were positive by iELISA, from the first day to 56th weeks. These results show that MS infections are very frequent and very widespread among poultry breeder flocks, and showed a perfect agreement between serological tests and Real time PCR starting from 32th week of age.

关键词： Mycoplasma synoviae Rapid Slide Agglutination iEL1SA PCR broiler breeders flocks

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