Newcastle Disease, Other Avian Paramyxoviruses, and Avian Metapneumovirus Infections

doi:10.1002/9781119421481.ch3

Cited by 9 publications

(4 citation statements)

References 486 publications

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“…In addition to clinical signs, gross post-mortem changes were apparently detected, since in poultry commonly seen as hemorrhages in the spleen, tracheal, proventriculus and cecal tonsils. As well as, the spleen may be enlarged, mottled and necrotic (Susta et al, 2011;Miller and Koch, 2013) which were observed almost in susceptible non-vaccinated flocks which were in agreement with the obtained findings in the present study.…”

Section: Discussionsupporting

confidence: 93%

“…Live-attenuated NDV vaccines are generally used in the first weeks of life in broilers, layers, and breeders, by either systemic or the respiratory route, in order to reduce the risk of infection with virulent strains. Furthermore, live vaccines administered by eye drop or orally have been https://dx.doi.org/10.36380/jwpr.2019.14 found to induce protective mucosal immunity mediated by Immunoglobulin (Ig) A and provide potent systemic immunity alongside their excellent safety profile (Miller and Koch, 2013). Thus, a highly immunogenic and safe live vaccine can provide a chance to enhance herd immunity through a massive vaccination program by the respiratory route (Al-Garib et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Advancement in Vaccination of Broiler Chickens with Genotype-Matched Vaccines to Currently Epidemic Newcastle Disease Virus Genotype VII in Egypt.

Amer¹,

Ali²,

Kandeil³

et al. 2019

jwpr

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Newcastle disease virus (NDV) outbreaks still occur frequently in Egypt in spite of the heavy implementation of classic NDV vaccines for a long time ago, where NDV genotype VII has become the dominant genotype in Egypt from 2012 until now. Many previous studies have recommended using genotype-matched NDV vaccines against the epidemic virus for providing better protection and minimizing virus shedding. Therefore, the present study evaluated the efficacy of two available live NDV vaccines in Cobb 500 broilers. The group A and B (20 birds each) were vaccinated with live attenuated NDV vaccines genotype VII and II, respectively with double doses at 5 and 19 days of age. Also, group C consisting of 20 unvaccinated birds was studied as a control group. The efficacy of live vaccines was determined using virus challenge test. Hence, all groups were challenged with velogenic NDV genotype VIId at a dose equivalent to 10 6.0 50 percent Embryo Infective Dose (EID 50) via the intramuscular route at 28 daysold. Serum antibodies level was assessed by hemagglutination inhibition test. Moreover, virus shedding was measured by EID 50. The obtained results indicated that vaccinated birds had similar haemagglutination titers with no significant difference prior challenge. Meanwhile, group A showed significant protection against mortality, as well as a significant reduction in virus shedding 7 days post-challenge compared to Group B. We concluded that live recombinant-genotype VII vaccine homologous to challenge virus could improve the protective efficiency in chicken against NDV compared to live classic genotype II vaccine. It is suggested that the implementation of genotypematched NDV vaccines confer better protection in commercial broilers vaccination programs.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Advancement in Vaccination of Broiler Chickens with Genotype-Matched Vaccines to Currently Epidemic Newcastle Disease Virus Genotype VII in Egypt.

Amer¹,

Ali²,

Kandeil³

et al. 2019

jwpr

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show abstract

“…According to our data, the probability of seroreversion seemed to be close to zero. Antibodies produced during a first natural infection are assumed to last for eight to twelve months, depending on the species 40,41 . Here, the data was collected over two years period, meaning that the relative absence of seroreversion is due to repeated exposure of wild birds to the virus, leading to a continuous detectable level of antibodies.…”

Section: Discussionmentioning

confidence: 99%

Newcastle disease virus transmission dynamics in wild peridomestic birds in the United Arab Emirates

Hirschinger

Marescot

Hingrat

et al. 2021

Sci Rep

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To understand the dynamics of a pathogen in an animal population, one must assess how the infection status of individuals changes over time. With wild animals, this can be very challenging because individuals can be difficult to trap and sample, even more so since they are tested with imperfect diagnostic techniques. Multi-event capture-recapture models allow analysing longitudinal capture data of individuals whose infection status is assessed using imperfect tests. In this study, we used a two-year dataset from a longitudinal field study of peridomestic wild bird populations in the United Arab Emirates during which thousands of birds from various species were captured, sampled and tested for Newcastle disease virus exposure using a serological test. We developed a multi-event capture-recapture model to estimate important demographic and epidemiological parameters of the disease. The modelling outputs provided important insights into the understanding of Newcastle disease dynamics in peridomestics birds, which varies according to ecological and epidemiological parameters, and useful information in terms of surveillance strategies. To our knowledge, this study is the first attempt to model the dynamics of Newcastle disease in wild bird populations by combining longitudinal capture data and serological test results. Overall, it showcased that multi-event capture-recapture models represent a suitable method to analyse imperfect capture data and make reliable inferences on infectious disease dynamics in wild populations.

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“…According to OIE procedures, the virus was propagated and titrated in SPF ECEs eggs (OIE, 2021;Reed & Muench, 1938). The collected allantoic fluid was verified using HA followed by HI using NDV antibodies, then its virulence was assessed by mean death time (MDT) (Alexander, 2017). The collected fluid was further purified and concentrated using the hemagglutination-elution method and evaluated using plate HA assay (OIE, 2021).…”

Section: Viruses and Cellsmentioning

confidence: 99%

Infection of Bone Marrow-Derived Mesenchymal Stem Cells with Virulent Newcastle Disease Virus Maximizes Cytokine Production: A Step Toward vNDV Immunotherapy

Wrshana¹,

Dowidar²,

El-Fiky³

et al. 2022

AAVS

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T he poultry industry represents a cornerstone in the Egyptian economy and a major source of animal protein production. It is associated with a large amount of national consumption that represents over 600 million dollars (FAO, 2013). Excessive usage of antibiotics in poultry has led to the emergence of highly resistant microbial path-ogens (Agyare et al., 2018). So, there is an urgent need to develop environmentally friendly materials and complementary treatments such as natural immune modifying cytokines (Umar et al., 2019).Improvement of meat and egg quality, and disease resistance to viral diseases as Newcastle disease in the Egyptian chicken traits with traditional breeding programs is

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Newcastle Disease, Other Avian Paramyxoviruses, and Avian Metapneumovirus Infections

Cited by 9 publications

References 486 publications

Advancement in Vaccination of Broiler Chickens with Genotype-Matched Vaccines to Currently Epidemic Newcastle Disease Virus Genotype VII in Egypt.

Advancement in Vaccination of Broiler Chickens with Genotype-Matched Vaccines to Currently Epidemic Newcastle Disease Virus Genotype VII in Egypt.

Newcastle disease virus transmission dynamics in wild peridomestic birds in the United Arab Emirates

Infection of Bone Marrow-Derived Mesenchymal Stem Cells with Virulent Newcastle Disease Virus Maximizes Cytokine Production: A Step Toward vNDV Immunotherapy

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