
Survey Interaction Between Avian Influenza Subtype H9N2 and NDV Lasota Vaccine in The Analysis of Serological Test Results | ||
تحقیقات دامپزشکی و فرآوردههای بیولوژیک | ||
Article 23, Volume 34, Issue 4, January 2022, Pages 202-207 PDF (639.56 K) | ||
Document Type: Short Communication | ||
DOI: 10.22092/vj.2020.351897.1772 | ||
Authors | ||
H Hosseini1; H Pour abbas2; Z. Ziafati Kafi3; N Sadri3; A Modiri Hamedan3; L Aghaeean3; F Jafari3; A Hojabr Rajeoni3; A Ghalyanchi Langeroudi* 3 | ||
1Department of Clinical Sciences, Faculty of Veterinary Medicine, Karaj Branch, Islamic Azad University, Karaj, Iran | ||
2Sepid Makian, Rasht, Iran | ||
3Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran | ||
Abstract | ||
During the breeding season, commercial poultry flocks are exposed to various viral, bacterial, mycoplasma, and fungal infectious agents. Vaccination and field challenges are examples of this infectious. Isolation, serological test, and molecular diagnosis were used to evaluate the vaccine response and laboratory diagnosis. Analysis of the serum response is one of the diagnostic challenges between laboratories and clinicians. The aim of this study was to investigate the effect of avian influenza virus infection on the results of Newcastle vaccines in poultry flocks. To do this, the effect of influenza (H9N2) respiratory infection on serum response to live Newcastle disease vaccine was investigated and the results of hemagglutination inhibition test were analyzed. The results showed that the presence of avian influenza virus increased the serum response to the Newcastle disease vaccine and increased the titer's dispersion so that in the study of the titers, some of the titers appeared to indicate disease. It can be analyzed that the influenza virus may have caused inflammation of the trachea to increase the penetration of the vaccine virus into the trachea and create a stronger immune response. In fact, this study demonstrates the synergistic effect of the H9N2 influenza virus and the Lasota vaccine virus. In poultry farms and especially broiler farms, due to the multiplicity of vaccines used and the high volume of challenge, for serological testing, it is recommended that a complete serum profile be used to survey titers all common respiratory factors. | ||
Keywords | ||
Respiratory diseases; Diagnosis; Serology; Newcastle vaccine; H9N2 | ||
References | ||
1. Alexander, D.J., J. G. Bell and R. G. Alders. 2004. A technology review: Newcastle disease, with special emphasis on its effect on village chickens. Available online at: http://www.fao.org/3/y5162e/y5162e00.htm . Accessed 01 January 2004. | ||
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