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Effect of associated vaccines on the interference between Newcastle disease virus and infectious bronchitis virus in broilers Rev. Bras. Ciênc. Avic.
Cardoso,WM; Aguiar Filho,JLC; Romão,JM; Oliveira,WF; Salles,RPR; Teixeira,RSC; Sobral,MHR.
The phenomenon of viral interference between live vaccines against Newcastle Disease and infectious bronchitis has been reported since the 50's and many researchers have reported its prejudicial effects on avian immunization. Therefore, this study evaluated the effect of associated vaccines on the interference between Newcastle disease virus (NDV) and infectious bronchitis virus (IBV) in broilers. There were 400 broiler chicks divided into five groups. The groups were submitted to mono or polyvalent vaccinations against IBV and NDV, except for the non-vaccinated control group (CG). Sera were collected at 35 and 45 days of age and submitted to serologic tests to assess antibody levels. It was observed the occurrence of interference in the immune response...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Infectious bronchitis; Newcastle disease; Vaccines; Viral interference.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000300008
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Evaluation of the Viral Interference between Lentogenic Newcastle Disease Virus (Lasota) and Avian Influenza Virus (H9N2) using Real-Time Reverse Transcription Polymerase Chain Reaction in SPF Chicken Rev. Bras. Ciênc. Avic.
Fazel,P; Mehrabanpour,MJ.
ABSTRACT Lentogenic Newcastle disease virus (lNDV) such as Lasota strain and low pathogenicity avian influenza such as H9N2 virus are two of the most economically important viruses affecting poultry worldwide, and little attention in recent years has been paid to simultaneous infections in chickens with these two viruses for the reason that co-infection do occur but are not easily detected. In the present study, chickens were inoculated with lNDV (Lasota) and LPAIV (A/chicken/Tehran/ZMT-173/99(H9N2)) simultaneously or sequentially three days apart. Oropharyngeal and cloacal swabs were collected from chickens from 1 to 14 days after inoculation. RRT-PCR for AIV and NDV detection was performed. The rate of viral shedding was measured within 14 days. No...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Newcastle disease; Influenza virus (H9N2); Viral interference.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300537
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Interference of infectious bursal disease virus on antibody production against Newcastle disease and infectious bronchitis virus Rev. Bras. Ciênc. Avic.
Cardoso,WM; Aguiar Filho,JLC; Romão,JM; Salles,RPR; Câmara,SR; Siqueira,AA; Oliveira,WF; Sobral,MHNR; Texeira,RSC.
This work has the objective of verifying the interference of infectious bursal disease virus in the antibody production against Newcastle disease virus and infectious bronchitis virus. The experiment was carried out with 640 day-old-chicks from a 42 weeks old hen flock. The birds were separated into eight experimental groups (n=80/group) and were submitted to different combinations of vaccinations, with live vaccines, to Newcastle disease, avian infectious bronchitis, and infectious bursal disease with diverse combinations of days of vaccination. We verified that the utilization of polyvalent vaccinal programs have a different efficacy comparing to monovalent vaccinations when Newcastle disease, infectious bronchitis, and infectious bursal disease...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antigenic variation; Polyvalent vaccinations; Viral interference.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000300007
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