Sero-Prevalence of Infectious Bronchitis in Chicken in Bangladesh

Das, SK; Khan, Md. Abu Hadi Noor Ali; Das, Mrinal Kumar

doi:10.3329/bjvm.v7i1.5068

Cited by 10 publications

(9 citation statements)

References 2 publications

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“…The findings is strong agreement with the report of , who demonstrated overall 58.00% seroprevalence of IBV in Fayoumi, RIR and local chickens of government poultry farms of Bangladesh. The results are also supported by the findings of Das et al (2009), who reported that overall seroprevalence of IBV in Bangladesh is 79.38%, and they found highest mean titer were 9867.29. These results also agreed with the report of previous study conducted by Alam et al (2003) and Biswas (2004) who found seroprevalence of IBV 92.06% and 77.83% respectively.…”

Section: Discussionsupporting

confidence: 86%

Seroprevalence of infectious bronchitis virus in different types of chicken in Bangladesh

Bhuiyan

Giasuddin

Khan

2018

Asian J. Med. Biol. Res

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Infectious bronchitis virus (IBV) is a highly contagious viral disease of the chicken. It is possibly the most economically important viral respiratory disease of chicken after Avian Influenza and Newcastle disease. The virus also affects the female reproductive tract, causing poor quality of egg and loss of egg production. The study was conducted in four types of chicken (broiler, layer, sonali and Deshi) from 7 sub-districts under 4 districts of Bangladesh. Total 833 blood samples from 103 farms were collected and subjected to indirect ELISA test by commercially available IBV ELISA kits to detect specific antibodies against IBV. In overall 59.30% seroprevalence observed, 23.82% was found in broiler, 97.87% in layer, 71.83% in sonali and 83.46% in Deshi types of chickens. Broiler samples showed lowest seroprevalence with high CV (CV%=171.38), among them 76.18% were not seroconvert because of high maternal antibody or poor vaccine response. Layers showed highest seroprevalence with CV% 58.86 that is 18.00% chickens shows titer above 14000 which indicated field infection. Deshi chickens were not commercially vaccinated even though they had high seroprevalence rates 83.46% with mean titer 5333 and CV% 79.88, indicating that IBV is circulating as endemic diseases in the selected areas. Sonali chickens now reared as commercial chicken, have lower seroprevalence rates with mean titer 3160, CV% 128.39 indicating that these birds were not properly vaccinated as they required. To prevent the flocks from IBV, live and attenuated vaccination is required according to circulating strains.Asian J. Med. Biol. Res. March 2018, 4(1): 132-136

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Section: Discussionsupporting

confidence: 86%

Seroprevalence of infectious bronchitis virus in different types of chicken in Bangladesh

Bhuiyan

Giasuddin

Khan

2018

Asian J. Med. Biol. Res

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“…Massachusetts strains (such as M41) are mainly used as vaccines in the field in Pakistan but we cannot totally rule out the use of 4-91 vaccines due to the limited control of imported vaccines. Similarly, high prevalence of IBV in backyard poultry (74%) and commercial poultry of Bangladesh (57%) were reported [26]. Sumi et al [27] classified Indian IBV isolates based on phylogenetic analysis within the Mass genotype (India/LKW/56/IVRI/08, now called GI-1) and the 793/B genotype (or 4-91 genotype, India/NMK/72/IVRI/10, now called GI-13).…”

Section: Discussionmentioning

confidence: 99%

Molecular epidemiology of respiratory viruses in commercial chicken flocks in Pakistan from 2014 through to 2016

et al. 2019

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Background Viral diseases are a matter of great concern for poultry farmers in Pakistan. Multiple common viral respiratory diseases (CVRDs) cause huge economic losses in the poultry industry. The prevalence of CVRDs in many countries, including Pakistan, is not clearly understood. Results Incidences of 5 chicken respiratory viruses: avian influenza virus (AIV), Newcastle disease virus (NDV/AAVV-1), infectious bronchitis virus (IBV), avian metapneumovirus (aMPV) and infectious laryngotracheitis virus (ILTV) were assessed on commercial Pakistani farms with respiratory problems from 2014 through to 2016. While AIV and AAVV-1 were frequently detected (16 to 17% of farms), IBV and aMPV were rarely detected (in 3 to 5% of farms) and ILTV was not detected. We characterized H9 AIV of the G1 lineage, genotype VII AAVV-1, GI-13 IBV, and type B aMPV strains with very little genetic variability in the 2-year study period. Co-infections with AIV and AAVV-1 were common and wild type AAVV-1 was detected despite the use of vaccines. Control measures to limit the virus burden in chicken flocks are discussed. Conclusions Our data shows that AIV (H9), AAVV-1, IBV and aMPV are prevalent in commercial poultry in Pakistan. Further studies are necessary to assess circulating strains, economic losses caused by infections and coinfections of these pathogens, and the costs and benefits of countermeasures. Furthermore, veterinarians and farmers should be informed of the pathogens circulating in the field and hence advised on the use of vaccines.

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“…Another researcher Das et al . [21] finds that a total of 79.38% sera samples of chickens of selected four districts of Bangladesh were seropositive. Although they do not differentiate the seroprevalence of IBV between vaccinated and non-vaccinated chickens.…”

Section: Discussionmentioning

confidence: 99%

Prevalence and molecular characterization of infectious bronchitis virus isolated from chicken in Bangladesh

Bhuiyan

Ali

Moula³

et al. 2019

Vet World

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Aim: The present study was aimed to determine the prevalence of infectious bronchitis virus (IBV) as well as virus isolation, identification, and molecular characterization of various strains circulating in Bangladesh. Materials and Methods: A total of 371 swabs and organ samples were collected from four types of chicken including layer, Sonali (local), broiler, and broiler breeder under eight districts (Rangpur, Bogura, Tangail, Dhaka, Gazipur, Mymensingh, Jamalpur, and Cumilla) during 2014-2016 in Bangladesh. Results: Out of 371 samples, 65 samples were positive in reverse transcriptase polymerase chain reaction (RT-PCR) for molecular identification of IBV. The overall prevalence was 17.52% recorded and among the selected types of chicken, the highest prevalence of IBV was found in layer that was 42.22% followed by 17.24% in Sonali, 14.93% in broiler breeder, and lowest prevalence was 11.94% in broiler chicken, respectively. Moreover, the prevalence of IBV was recorded highest in aged chicken at 41-60 weeks, which was 54.55% in layer, 27.27% in Sonali, and, afterward, 14.68% was found in broiler breeder, respectively. Frequency of IBV more frequently in winter (22.67%) followed by rainy (15.87%) and summer season (11.58%). The highest prevalence of IBV was found Tangail district (41.67%) followed by Mymensingh (24.42%), Gazipur (19.32%), Dhaka (15.38%), Jamalpur (16.67%), Bogura (13.68%), Cumilla (5.88%), and Rangpur (9.26%), respectively. Samples that were found high positive in IBV RT-PCR (Ct value below 30) were subjected to inoculation into chicken egg embryo to observe characteristic changes in chicken embryo. Swabs and organ samples were processed and passaged in 9-day-old embryonated chicken eggs through allantoic cavity route. IBV virus suspected samples inoculated into chicken egg embryos after 3-5 passages showed dwarfing and curling of the embryos which are characteristic lesions of IBV. Allantoic fluid was collected from all inoculated eggs and performed partial sequencing of S1 gene for three isolates. After sequencing, the phylogenetic tree was constructed from the nucleotide sequences of IBV isolates. Two of the isolates are 4/91 IBV and another one matched with QX-like IBV. Conclusion: The results revealed that the three isolates from different places in Bangladesh were identified for the 1st time as which will help for IBV control strategy.

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Sero-Prevalence of Infectious Bronchitis in Chicken in Bangladesh

Cited by 10 publications

References 2 publications

Seroprevalence of infectious bronchitis virus in different types of chicken in Bangladesh

Seroprevalence of infectious bronchitis virus in different types of chicken in Bangladesh

Molecular epidemiology of respiratory viruses in commercial chicken flocks in Pakistan from 2014 through to 2016

Prevalence and molecular characterization of infectious bronchitis virus isolated from chicken in Bangladesh

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