جستجوی مقالات مرتبط با کلیدواژه "گله مادر گوشتی" در نشریات گروه "دامپزشکی"

Mycoplasma Synoviae is a major poultry pathogen which causes significant economic losses to the poultry industry. The aim of study was detection Mycoplasma synoviae infections in vaccinated broiler breeder flocks and their progeny. For this purpose, from 20 broiler breeder farms and their progeny 2 times in 40 and 60 weeks of age 20 tracheal swab and 20 blood samples from each broiler farm were collected. All 20 broiler breeder farms before vaccination against Myc.oplasma Synoviae were confirmed free from Mycoplasma synoviae infections. Tracheal swab transfered to cap tubes containing PPLO broth media and kept at 4°C less than 24 hrs send to laboratory for further proceeding. Antibody against Mycoplasma Synoviae was measured by rapid serum agglutination (RSA) and Elias tests. Tracheal swabs were examined by high resolution melting PCR(HRM PCR) for detection Mycoplasma Synoviae field isolate.. The results showed that vaccination broiler farm against Mycoplasma Synoviae upto 40 weeks could protect all broiler breeder farms from Mycoplasma Synoviae field infection and produce good antibody titers. With increasing age and at age 60 weeks one farms and its progeny was positive for Mycoplasma Synoviae which was differ from Mycoplasma Synoviae included in live vaccine. This study showed vaccination by present vaccine against Mycoplasma Synoviae in broiler breeder farms could not protect older broiler breeder farms in older ages and probably Mycoplasma Synoviae infection transferred to progeny. Therefore vaccinated farms should be monitor by molecular methods.

Chicken Infectious Anemia (CIA), a disease of young chickens, can be prevented by immunization of breedingflocks with live vaccines. The objective of the present work was to perform the effcacy of one attenuated live vaccineNobilis CAV P4 (Intervet Co., Netherland) based on induction of persistent antibodies in broiler breeder and theirprogenies compared to unvaccinated broiler breeder flock. The vaccine administrated to Ross 308 broiler breederflocks at 6-week old via S.C. rout. A total of 352 serum samples were collected from vaccinated and unvaccinatedbreeder flocks from 6 to 33 week old (5, 12, 16, 20 and 28 weeks after vaccination) and twice in their progeny flocksat one- day old. Sera were analyzed by indirect ELISA (Synbiotics Corporation, USA) and data were compared statistically between the two groups by t-test. The results showed natural infection of CIA virus in unvaccinated breederflock and not only the mean titer was higher but also thecoeffcient variant (CV%) was lower than vaccinated breederflock signifcantly (P<0.05). But the CV% in progeny of vaccinated breeder flock was lower than the CV% in progeny of unvaccinated breeder flock. Also, there was anti-CAV antibody negative in hens and progenies in unvaccinatedbreeder flock, so these hens potentially can transmit the virus vertically. All breeders from vaccinated flock were positive serologically. It seemed that vaccination could be an effcient rout for eliminating susceptible birds, decreasingvariation in anti-CAV antibodies titers and induction persistent antibody titer. However more experiments need to becarried out to defne if vaccination really is desirable.