E-ISSN 2536-9520 | ISSN 1110-2047
 

Original Research (Original Article) 


Epidemiological Surveillance of Some Avian Respiratory Viral Diseases in Broiler Chickens

Mahmoud E Sediek, Nahed A El-Shall, Abeer F El-nahas, Rahma A Abdel-salam, Ashraf M Awad.

Abstract
The present study aimed to specify the most important respiratory viral diseases affecting broiler chickens under Egyptian conditions. Forty four broiler chicken flocks were investigated in three governorates (Alexandria, El-Behera and Kafr El-sheikh) that showed high mortality rate with respiratory manifestations and/or diarrhea. The collected samples (trachea and lungs homogenates) were examined for Avian Influenza viruses (AIv) (H5&H9), Newcastle Disease virus (NDv) and Infectious Bronchitis virus (IBv) through isolation in specific pathogen free (SPF) eggs and identification by slide hemagglutination test and Real time reverse transcriptase polymerase chain reaction (RRT-PCR). The results revealed that the highest detection rate was NDv (20/44) with positivity percent (45.46%), 7 flocks out of 44 were positive for AI H9 (15.90%), while 3 flocks (3/44) were positive for AI H5 (6.82%), on the other hand 4 flocks (4/44) were positive for IBv (9.10%). Sequencing and phylogenetic analysis of F gene of selected 8 NDv isolates, they were related to genotype VII, also sequencing for haemagglutinin (HA) gene of selected AIv isolates showed that two isolates belonged to H5N8 highly pathogenic avian influenza (HPAI) (clade 2.3.4.4.b) and one isolate belonged to H5N1 HPAI clade 2.2.1.2, while two selected H9 isolates were related to H9N2 low pathogenic avian influenza (LPAI) group B. on the other hand, sequencing of S1 gene for one selected IBv isolate was related to EGY variant II. So, continuous surveillance of different respiratory diseases that represent a large economic threat for poultry industry should be maintained to facilitate the possible protocols to prevent and control these diseases.

Key words: Broiler chickens, Influenza virus, IB, RRT-PCR, Newcastle disease


 
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How to Cite this Article
Pubmed Style

Sediek ME, El-Shall NA, El-nahas AF, Abdel-salam RA, Awad AM, . Epidemiological Surveillance of Some Avian Respiratory Viral Diseases in Broiler Chickens. AJVS. 2019; 61(1): 185-194. doi:10.5455/ajvs.9184


Web Style

Sediek ME, El-Shall NA, El-nahas AF, Abdel-salam RA, Awad AM, . Epidemiological Surveillance of Some Avian Respiratory Viral Diseases in Broiler Chickens. http://www.alexjvs.com/?mno=9184 [Access: February 08, 2020]. doi:10.5455/ajvs.9184


AMA (American Medical Association) Style

Sediek ME, El-Shall NA, El-nahas AF, Abdel-salam RA, Awad AM, . Epidemiological Surveillance of Some Avian Respiratory Viral Diseases in Broiler Chickens. AJVS. 2019; 61(1): 185-194. doi:10.5455/ajvs.9184



Vancouver/ICMJE Style

Sediek ME, El-Shall NA, El-nahas AF, Abdel-salam RA, Awad AM, . Epidemiological Surveillance of Some Avian Respiratory Viral Diseases in Broiler Chickens. AJVS. (2019), [cited February 08, 2020]; 61(1): 185-194. doi:10.5455/ajvs.9184



Harvard Style

Sediek, M. E., El-Shall, N. A., El-nahas, A. F., Abdel-salam, R. A., Awad, A. M. & (2019) Epidemiological Surveillance of Some Avian Respiratory Viral Diseases in Broiler Chickens. AJVS, 61 (1), 185-194. doi:10.5455/ajvs.9184



Turabian Style

Sediek, Mahmoud E, Nahed A El-Shall, Abeer F El-nahas, Rahma A Abdel-salam, Ashraf M Awad, and . 2019. Epidemiological Surveillance of Some Avian Respiratory Viral Diseases in Broiler Chickens. Alexandria Journal of Veterinary Sciences, 61 (1), 185-194. doi:10.5455/ajvs.9184



Chicago Style

Sediek, Mahmoud E, Nahed A El-Shall, Abeer F El-nahas, Rahma A Abdel-salam, Ashraf M Awad, and . "Epidemiological Surveillance of Some Avian Respiratory Viral Diseases in Broiler Chickens." Alexandria Journal of Veterinary Sciences 61 (2019), 185-194. doi:10.5455/ajvs.9184



MLA (The Modern Language Association) Style

Sediek, Mahmoud E, Nahed A El-Shall, Abeer F El-nahas, Rahma A Abdel-salam, Ashraf M Awad, and . "Epidemiological Surveillance of Some Avian Respiratory Viral Diseases in Broiler Chickens." Alexandria Journal of Veterinary Sciences 61.1 (2019), 185-194. Print. doi:10.5455/ajvs.9184



APA (American Psychological Association) Style

Sediek, M. E., El-Shall, N. A., El-nahas, A. F., Abdel-salam, R. A., Awad, A. M. & (2019) Epidemiological Surveillance of Some Avian Respiratory Viral Diseases in Broiler Chickens. Alexandria Journal of Veterinary Sciences, 61 (1), 185-194. doi:10.5455/ajvs.9184





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