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Diagnosis and Detection of Infectious Bronchitis Virus Using RT-PCR Technology in Broiler Farms in Syria

تشخيص وكشف فيروس التهاب القصبات المعدي باستخدام تقنية RT-PCR في مزارع دجاج اللحم في سورية

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 Publication date 2019
  fields Animal Production
and research's language is العربية
 Created by Shamra Editor




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A reverse transcriptase-polymerase chain reaction (RT-PCR) technique was used to detect infectious bronchitis virus (IBV) in the commercial broiler flocks in Syria. 50 tissue samples were taken from tracheal tissue, trachea and kidney of the broilers suspected of infectious bronchitis (IB) from different governorates of Syria i.e. Latakia, Tartous, Hama and Damascus countryside. RNA was extracted directly from the tissue samples and then RNA was converted to cDNA by RT-PCR technology; PCR reaction and Nested PCR interaction were carried out sequentially. The primers used in the RT-PCR reaction were selected from the S1 gene (spike), where mutations of the virus genome were concentrated in this region (the hypervariable region). Some positive samples (10) were injected at an age of 9-11 days old SPFEE-specific pathogen free embryonated eggs according to the methods adopted in virology. This research was carried out at the laboratories of Latakia Research Center, General Commission for Scientific Agricultural Research GCSAR, in cooperation with the PCR laboratory at the Faculty of Veterinary Medicine in Hama. The results showed the existence of 37 positive case for RT-PCR (74%), and the infectious embryos showed clear and characteristic anatomical lesions of the infectious bronchitis virus after 5-6 days post injection, delayed and undeveloped fetal (dwarfism), fingertip entanglement and hemorrhage compared with the negative control. The results also showed the sensitivity and speed of the RT-PCR test in the detection of the IBV virus.



References used
Cavanagh, D. (1983). Coronavirus IBV: structural characterization of the spike protein. J. Gen. Virol., 64: 2577-2583.
Cavanagh, D.; P. Davis; J. Darbyshire; and R. Peters (1986). Coronavirus IBV: virus retaining spike glycopolypeptide S2 but not Sl is unable to induce virus-neutralizing or hemagglutinationinhibiting antibody, or induce chicken tracheal protection. J. Gen. Virol., 67: 1435-1442.
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