Facteurs favorisant l’apparition de la maladie de Newcastle au Tchad

Ban-Bo, BA; Kebkiba, Bidjeh; Nadjilem, D

doi:10.4314/jab.v70i1.98760

Cited by 2 publications

(4 citation statements)

References 17 publications

(21 reference statements)

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“…If the presence of maternal antibodies appears to play a key role in the onset of ND, it is not least for the factors favoring the appearance of this disease, including: climate change, high pressure of animal in a given period, human activity, etc. which are one of the main causes of ND in Chad [5].…”

Section: Resultsmentioning

confidence: 99%

“…Also, in the courtyard of an EpUn poultry shares food with other domestic animals, such as sheep, goats, cattle, horses, pigs, dogs and cats. As a poultry flock who walks all day long looking for food and water, and in ongoing contact with various animals is exposed to various infections such as Newcastle disease, when we know that some of these animals are healthy carriers [4,5,17]. In addition to this, most flocks consists of young pretty fragile the balance of all the stress and often more tolerant adults.…”

Section: Methodsmentioning

confidence: 99%

“…During this period, the presence of natural barriers is observed around houses limiting routes of birds: surface water, ponds, tall grass, etc. [4,5] . According to the laboratory results, mortality rate has been more remarkable in chicks whose age ranged between 1 and 1.5 months.…”

Section: Methodsmentioning

confidence: 99%

“…According to the producers mortality rate ranged between 65 and 100% among non-vaccinated poultry, yearly. In some avian species, the clinical manifestations of the NDV seem to be severe while in others it appears as less symptomatic [3,10].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Clinical Manifestation of Newcastle Disease in Traditional Poultry of Chad

Bonhotal¹,

Schwarz

Stehman³

2014

AVS

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Since its discovery in 1926, the virus of Newcastle disease (NDV) has been well described by several authors. But the control of this disease remains today a topical issue. It causes economic losses in industrialized and developing countries. The clinical manifestation of NDV differs from one species to another. This article places a state of clinical manifestation of the virus of Newcastle disease in traditional avian population, raised in the same breeding conditions. That avian population has been made up of chickens, ducks, guinea fowl and pigeons. The clinical manifestation of NDV has been observed by species, age and in epidemiological units (EpUn). The choice of EpUn has been done randomly. A total of 372 EpUn with a workforce of 13608 volatile have been observed. Young people aged at least 6 months have been 51.5% , 5.6%, 0.4% and 1.3% of the total, for chickens, ducks, guinea fowl and pigeons respectively. According to this order, adults over 6 months represented 28%, 5.4%, 4.8% and 3%. The clinical manifestation of the NDV has been observed in all domestic poultry species. Mortality varied between 26 and 99% in chickens; 17 and 75% in ducks; 8 and 100% in guinea fowls, and 11 and 100% among pigeons. Young volatiles have been more sensitive to NDV than adults. Mortality varied between 33 and 99% in young chickens, 21 and 75% in young ducks; 22 and 100% in young guinea fowl; 18 and 100% among young pigeons. In adults the rate varied respectively between 26 and 78%; 17 and 47%; 8 and 26%, 11 and 73% in the same species. Among this population of young volatiles, ducklings have been less sensitive than other young. Maternal antibodies seem to persist beyond a month and a half, while the chicks aged a month could present the clinical manifestations of the disease. Animal concentration, climatic changes, socioeconomic activities of man and other emergence of ND factors seem to play an important role in the clinical manifestation of NDV from traditional domestic poultry. Knowledge of the clinical manifestation of this disease among the traditional bird population is one of the essential elements of its control.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of Clinical Manifestation of Newcastle Disease in Traditional Poultry of Chad

Bonhotal¹,

Schwarz

Stehman³

2014

AVS

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Serological, clinical, and risk factors of the Newcastle disease on broilers flocks in Algeria

et al. 2019

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Aim: The work aimed at studying the serological and clinical factors, as well as the risk factors of the Newcastle disease (ND) on broilers herds in Algeria. Materials and Methods: A sample of 1248 birds was randomly selected from 52 broiler flocks. We took blood samples from each bird at the level of the wing vein area where an indirect enzyme-linked immunosorbent assay technique was carried out through the use of an IDvet kit. Results: The flocks showed 82.69% of seroprevalence. Clinically speaking, the most common symptoms were sneezing, rale, greenish diarrhea, torticollis, and motor discords. Most commonly observed postmortem lesions were the proventriculitis, tracheitis, and enteritis. Especially, the caeca are hemorrhagic. The scores show the effect of risk factors. There was a significant effect on the mortality, the hygiene and vaccination groups on antibody titers in time 2. The antibody titers were elevated in the herd that recorded a high mortality (more than 10%) compared with those which recorded a low mortality (<10%) (p=0.002). Therefore, the antibody titers were elevated in herds with bad hygiene, compared with the ones with good hygiene (p=0.04). At last, when broiler chicken were not boosted by ND vaccine, flocks appeared to be more seropositive (p=0.02). Conclusion: The serological survey conducted in this study provided an important scope for ND as a dominant viral disease in broilers. Many factors are responsible for the onset of these diseases; correct biosecurity measures are needed to reduce the impact of this pathology in poultry farms.

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Facteurs favorisant l’apparition de la maladie de Newcastle au Tchad

Cited by 2 publications

References 17 publications

Analysis of Clinical Manifestation of Newcastle Disease in Traditional Poultry of Chad

Analysis of Clinical Manifestation of Newcastle Disease in Traditional Poultry of Chad

Serological, clinical, and risk factors of the Newcastle disease on broilers flocks in Algeria

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