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Molecular Monitoring of D1466 Genotype of Avian Infectious Bronchitis Virus in Iran: A Retrospective Study in 2013-2017 | ||
| Archives of Razi Institute | ||
| مقاله 3، دوره 75، شماره 2، شهریور 2020، صفحه 163-168 اصل مقاله (121.66 K) | ||
| نوع مقاله: Original Articles | ||
| شناسه دیجیتال (DOI): 10.22092/ari.2018.121512.1214 | ||
| نویسندگان | ||
| R. Khaltabadi Farahani1؛ A. Ghalyanchilangeroudi* 2؛ M. H. Fallah Mehrabadi3؛ S. A. Ghafouri4؛ H. Maghsoudloo1 | ||
| 1Iranian Veterinary Organization, Tehran, Iran | ||
| 2Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran | ||
| 3Department of Poultry Diseases, Razi Vaccine and Serum Research Institute, Agricultural Research, Education, and Extension Organization (AREEO), Karaj, Iran | ||
| 4Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran | ||
| چکیده | ||
| Infectious bronchitis is one of the most common diseases in the poultry industry in many countries, especially in the regions with a dense poultry farming industry. Gammacoronavirus is the etiologic agent of this disease, with the chickens and poultries as the natural reservoirs of the virus. Various strains of infectious bronchitis virus have been reported in poultry around the world. In terms of pathogenicity, this virus can induce a spectrum of diseases ranging from the moderate respiratory tract to kidney and reproductive diseases. The serotypes of this virus do not cause cross-immunity against each other. This issue makes it difficult to control the disease. Based on the analysis of the highly variable region of the glycoprotein S1 gene, the isolated strains in Iran were classified into seven different phylogenetic groups, including Massachusetts, QX, IS-720, IS-1494, 793/B, IR-1, and IR-2. The D1466 genotype has not been reported in the country; however, the killed vaccine is used in broiler breeder farms. In this study, tissue specimens were collected from 700 farms (i.e., broiler, egg-laying, and broiler breeder farms) suspected of infectious bronchitis within 2013-2017. The samples were examined using real-time reverse transcription-polymerase chain reaction. The D1466 genotype was not detected in any of the studied specimens. Due to the lack of immunity of the D1466 serotype against the dominant types in the country, one has to be careful in choosing the right vaccine. It is necessary to perform continuous monitoring of the circulation status of the various serotypes of viruses in the country to identify the dominant and possible new serotypes for the utilization of the appropriate vaccine. | ||
| کلیدواژه‌ها | ||
| D1466 infectious bronchitis؛ Commercial farms؛ Real-time RT-PCR؛ Iran | ||
| عنوان مقاله [English] | ||
| پایش مولکولی ژنوتیپ D1466 ویروس برونشیت عفونی پرندگان در ایران: یک مطالعه گذشته-نگر (1396-1393) | ||
| چکیده [English] | ||
| برونشیت عفونی (IB) یکی از مهمترین بیماریهای شایع در صنعت طیور در بسیاری از کشورها و به خصوص کشورهایی است که دارای صنعت پرورش طیور متراکم هستند. سویههای متنوعی از ویروس برونشیت عفونی در طیور جهان گزارش شده است و از نظر بیماریزایی، طیفی از بیماری از درگیری تنفسی متوسط تا بیماریهای کلیوی و دستگاه تولید مثلی را ایجاد میکند. سروتیپهای مختلف ویروسهای برونشیت، ایمنی متقاطع بر علیه یکدیگر ایجاد نمیکنند و همین عامل کنترل این بیماری را مشکل کرده است. بر اساس آنالیز ناحیه بسیار متغیر ژن گلیکوپروتئین S1 سویههای جداشده در ایران به هفت گروه فیلوژنتیک مختلف طبقه بندی شدند که شامل ماساچوست، B/793، IS-1494، IS-720، QX، IR-1، IR-2 بود. تاکنون ژنوتیپ D1466 در کشور گزارش نشده است اما واکسن کشته آن در مزارع مادر استفاده میگردد. در این مطالعه، نمونههای بافتی (نای، ریه، کلیه) 700 مزرعه گوشتی، تخمگذار و مادر مشکوک به برونشیت عفونی به روشReal time RT-PCR مورد آزمایش قرار گرفت. ژنوتیپ D1466 در هیچ کدام از نمونه های مورد بررسی طی سالهای 1393 تا 1396 ردیابی نگردید . از طرفی به دلیل عدم پوشش ایمنی حاصل از سروتیپ D1466 بر علیه تیپهای غالب در کشور، میبایست در انتخاب واکسنهای کشته مناسب دقت عمل داشته باشیم. از طرفی پایش مداوم وضعیت گردش سروتیپهای مختلف ویروس در گردش کشور با هدف شناسایی سروتیپ غالب و سروتیپهای جدید احتمالی برای استفاده از واکسن مناسب ضروری است. | ||
| کلیدواژه‌ها [English] | ||
| تیتر آنتی بادی, ویروس آنفلوآنزا (تحت تیپ H9N2), مزراع گوشتی, ایران | ||
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