Seroprevalence of Newcastle Disease Virus in Chickens in Six
Local Government Areas of Benue State, Nigeria

Owoya, Abah Helen; Ayuba, Abdu Paul; Assam, Assam

doi:10.3923/ijps.2016.454.458

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…On Farm 7, and as assumed on Farm 2 (due to incomplete reporting), the last dose of live NDV vaccine had been administered <10 days previously, and consequently it is possible that birds may have been clinically affected by, and/or were excreting vaccine virus, hence the lentogenic strain observed via sequencing. Indeed, previous reports have indicated that viral replication and excretion may occur due to the vaccine virus itself, consequently resulting in subclinical infection ( 30 , 33 ). Additionally, in the current study, co-infections of NDV with IBV were observed in 6 flocks, as has been previously reported ( 34 , 35 ).…”

Section: Discussionmentioning

confidence: 99%

Evaluating Disease Threats to Sustainable Poultry Production in Africa: Newcastle Disease, Infectious Bursal Disease, and Avian Infectious Bronchitis in Commercial Poultry Flocks in Kano and Oyo States, Nigeria

et al. 2021

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The growth of the poultry industry in Nigeria is constrained by major poultry diseases, despite the implementation of vaccination programs. This study aimed to assess the level of protection against Newcastle disease (ND), infectious bursal disease (IBD), and avian infectious bronchitis (IB) afforded by current vaccination schedules and characterize the circulating virus strains in commercial poultry flocks in Nigeria. A cross-sectional study was conducted on 44 commercial poultry farms in Oyo and Kano states of Nigeria. Serum and tissue samples and data on flock, clinical and vaccination records were collected on each farm. Farms were classified as being protected or not protected against ND, IBD and IB based on a defined criterion. Real-time reverse transcription polymerase chain reaction (rRT-PCR) testing was performed for each target virus on tissue samples and positive samples were sequenced. A total of 15/44 (34.1%), 35/44 (79.5%), and 1/44 (2.3%) farms were considered to be protected against ND, IBD, and IB, respectively, at the time of sampling. NDV RNA was detected on 7/44 (15.9%) farms and sequences obtained from 3/7 farms were characterized as the lentogenic strain. Infectious bursal disease virus (IBDV) RNA was detected on 16/44 (36.4%) farms tested; very virulent (vv) IBDV and non-virulent (nv) IBDV strains were both detected in 3/16 (18.8%) positive samples. Sequences of IBDV isolates were either clustered with a group of genotype 3 virulent IBDV strains or were related to vaccine strains MB and D78 strains. IBV RNA was detected on 36/44 (81.8%) farms, with variant02, Massachusetts, 4/91, and Q1 variants detected. Sequences of IBV isolates were either clustered with the vaccines strains Massachusetts M41 and H120 or were most closely related to the D274-like strains or a clade of sequences reported in Nigeria and Niger in 2006 and 2007. This study revealed that most study farms in Oyo and Kano states did not have adequate protective antibody titers against IBV and NDV and were therefore at risk of field challenge. Infectious bursal disease virus and IBV RNA were detected on farms with a history of vaccination suggesting potential vaccination failure, or that the vaccine strains used mismatch with the circulating strains and are therefore not protective.

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Section: Discussionmentioning

confidence: 99%

Evaluating Disease Threats to Sustainable Poultry Production in Africa: Newcastle Disease, Infectious Bursal Disease, and Avian Infectious Bronchitis in Commercial Poultry Flocks in Kano and Oyo States, Nigeria

et al. 2021

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“…Because village chickens roam freely in their local environment, there is also a possibility of disease transfer from other domestic fowls and wild birds (Acamovic et al, 2005;Nyoni, 2011). Climate change may exacerbate disease risk, both through an increase in the prevalence of particular diseases and as a result of disease vectors and parasites establishing themselves in new regions (Gale et al, 2010;Owoya et al, 2018;Semenza & Menne, 2009). Such indirect effects of climate change are likely to compound the direct effects of increased temperature, exacerbating heat stress in rural poultry (Lara & Rostagno, 2013).…”

Section: Discussionmentioning

confidence: 99%

Perceived impacts of climate change on rural poultry production: a case study in Limpopo Province, South Africa

Nyoni

Grab

Archer

et al. 2021

Climate and Development

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Rural farming households in developing countries frequently contend with multiple challenges, including a lack of resources, food insecurity, and poverty. Climate change threatens to compound existing challenges, particularly in such rural subsistence economies with limited adaptive capacity. We aim to establish farmers' perspectives on likely impacts of climate change on their rural poultry production in northern South Africa. A baseline questionnaire-based study was conducted across 106 households in the town of Musina, South Africa. Most households lacked reliable and adequate sources of income and had, for example, days when they had to skip meals as a coping strategy. With such poverty, coupled with poor access to scientific information on agricultural production, these farmers typically have limited capacity to adapt to shocks such as climate variability and change. Farmers reported a reduction in poultry productivity in recent years, coinciding with increased ambient temperatures. There are concerns that recent and ongoing warming trends will have negative impacts on the future growth and wellbeing of birds. However, the farmers in our study perceived their poultry as hardy and well adapted to survive any future climatic changes and may be uninclined to take adaptive action at this stage.

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Seroprevalence of Newcastle Disease Virus in Chickens in Six Local Government Areas of Benue State, Nigeria

Cited by 2 publications

References 11 publications

Evaluating Disease Threats to Sustainable Poultry Production in Africa: Newcastle Disease, Infectious Bursal Disease, and Avian Infectious Bronchitis in Commercial Poultry Flocks in Kano and Oyo States, Nigeria

Evaluating Disease Threats to Sustainable Poultry Production in Africa: Newcastle Disease, Infectious Bursal Disease, and Avian Infectious Bronchitis in Commercial Poultry Flocks in Kano and Oyo States, Nigeria

Perceived impacts of climate change on rural poultry production: a case study in Limpopo Province, South Africa

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