Epidemiological investigation of outbreaks of fowl adenovirus infections in commercial chickens in China

Niu, Yong; Sun, Qinqin; Zhang, G.; Sun, Wei; Liu, X.; Xiao, Yihong; Shang, Yue; Liu, S.

doi:10.1111/tbed.12691

Cited by 59 publications

(57 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This results in poor feed absorption with the consequent general symptoms [ 5 ]. FAdV-I was detected in young and old birds ( Table 4 and Table 5 ), corroborating results obtained previously [ 29 ], where the virus was found in several samples from broilers, layers, and domestic chickens of all ages, even though the clinical signs were more severe in younger birds [ 30 ]. ChPV infections affect young birds in their first four weeks [ 23 , 27 ], which is supported by our findings since the virus was detected in 20 infected samples from broilers between 1 and 28 days old ( Table 8 ).…”

Section: Discussionsupporting

confidence: 90%

Enteric Virus Diversity Examined by Molecular Methods in Brazilian Poultry Flocks

Torre

Astolfi-Ferreira

Ferreira

2018

Veterinary Sciences

View full text Add to dashboard Cite

Enteric viruses play an important role in the Brazilian poultry industry due to the economic impact of resulting low yields of broilers, layers, and breeders. The most common enteric viruses affecting commercial flocks in Brazil include Fowl Adenovirus of group I (FAdV-I), Chicken Parvovirus (ChPV), Chicken Astrovirus (CAstV), Avian Nephritis Virus (ANV), Infectious Bronchitis Virus (IBV), Avian Reovirus (AReo), and Avian Rotavirus (ARtV). The aim of this study was to identify single and multiple infections using data obtained from 270 samples from eleven Brazilian states, corresponding to the period between 2010 and 2017. This was accompanied by an analysis of the relationship between the age of birds, clinical signs, and geographical distribution, using Polymerase Chain Reaction (PCR) and Reverse Transcription-PCR (RT-PCR) techniques. Twenty-five profiles of virus combinations were detected. Single infections were encountered in 86.3% of samples, and multiple infections were present in the remaining 13.7%. Both single and multiple infections affected all kinds of commercial chickens with digestive problems, stunting syndrome, decreases in egg and meat production, increased mortality, and respiratory signs. FAdV-I, ChPV, CAstV, ANV, and ARtV were mostly detected in young broilers, in contrast with IBV, which was detected in hens from one to greater than 51 weeks of age. These results exhibit the complexity of enteric diseases and the still poorly understood role of each pathogen as a unique etiological agent.

show abstract

Section: Discussionsupporting

confidence: 90%

Enteric Virus Diversity Examined by Molecular Methods in Brazilian Poultry Flocks

Torre

Astolfi-Ferreira

Ferreira

2018

Veterinary Sciences

View full text Add to dashboard Cite

show abstract

“…However, the positive rate of FAdV in 24 farms was still 75%, and the major genotype was FAdV-C4, indicating that silent infection may exist on these farms. What's more, consistent with previous studies (Niu et al, 2017), the FAdV-E7 was also popular in the farms with HRHS, but the pathogenicity about this stain was rare, and the effects of this virus on chickens need further analysis.…”

Section: Discussionsupporting

confidence: 85%

Epidemiological investigation of the novel genotype avian hepatitis E virus and co‐infected immunosuppressive viruses in farms with hepatic rupture haemorrhage syndrome, recently emerged in China

Zhang

et al. 2018

Transbound Emerg Dis

View full text Add to dashboard Cite

Since 2016, hepatic rupture haemorrhage syndrome (HRHS) appeared in chickens of China and caused huge economic loss. To assess the infection status of the avian hepatitis E virus (HEV) and co‐infected viruses, including avian leukosis virus (ALV), reticuloendotheliosis virus (REV), fowl adenovirus (FAdV), and chicken infectious anaemia virus (CIAV), in farms with HRHS, 180 liver samples were collected from 24 farms in different provinces and detected by strict molecular virology methods. Results showed that the positive rates of HEV, ALV, REV, FAdV, and CIAV were 74.44%, 20.00%, 27.78%, 31.11%, and 12.22%, respectively, whereas there are also 112 samples with co‐infection, for a rate of 58%. Meanwhile, the positive rate of HEV decreased gradually with age; the lowest positive rate of ALV (5.76%) and REV (19.23%) appeared in 25–35 weeks age, during which the positive rate of CIAV was the highest (19.23%); the positive rate of HEV in layers (64.00%) was lower than that of broilers (83.33%), but the positive rates of ALV (38.46%) and CIAV (15.38%) in layers were higher than that of broilers (5.88%, 9.80%); the positive rates of HEV (75.88%) and CIAV (15.60%) in parental generation (PG) were higher than that of commodity generation (CG, 64.10%, 0.00%), whereas the positive rate of ALV showed inverse relationship (PG: 14.89%; CG: 38.46%). Additionally, phylogenetic analysis showed that all the avian HEV identified this study belong to a novel genotype, and found the close relationship between the wild strains (REV and CIAV) and corresponding isolates from contaminated vaccine. The data presented in this report will enhance the current understanding of the epidemiology characteristics in farms with HRHS in China.

show abstract

“…This results in poor feed absorption with the consequent general symptoms (JINDAL et al, 2009). FAdV-I was detected in young and old birds (Tables 10 and 11), corroborating results obtained previously (NIU et al, 2018), where the virus was found in several samples from broilers, layers, and domestic chickens of all ages, even though the clinical signs were more severe in younger birds (TORO et al, 2000). ChPV infections affect young birds in their first four weeks , which is supported by our findings since the virus was detected in 20 infected samples from broilers between 1 and 28 days old (Table 14).…”

Section: Phylogenetic Analysissupporting

confidence: 90%

“…IBV can be detected in the intestinal content, trachea, lung, liver, bursa of Fabricius, pancreas, thymus, kidney, proventriculus, and spleen of affected birds FAN et al, 2012), according to the dynamic distribution of the virus, resulting in a wide range of useful organs for molecular detection of this virus, which in our case helped to determine the presence of the pathogen in liver, intestine, pancreas, cloacal swabs, and caecal tonsils (Table 13). In our study, we found three different serotypes of FAdV-I, without ruling out the possibility of multiple FAdV infections in the same sample because multiple strains of different serotypes can affect to the same animal (NIU et al, 2018).…”

Section: Phylogenetic Analysiscontrasting

confidence: 51%

>b<Detection and molecular characterization of enteric viruses in commercial birds >/b<

Duque¹

View full text Add to dashboard Cite

Ao meu querido filho Emilio José, que com seu espírito me motiva todos os dias para superar os desafios que a vida me reserva, procurando sempre o sucesso para compartilhá-lo com ele. A todos que eu amo, minha esposa Cristina, meus pais Wilson e Lidia, meus irmãos Consuelo e Wilmer, meus sobrinhos e sobrinhas Katrin, Brenda, Jéssica, Aaron, Jaidé, Michu e Samy, para quem compartilho meu esforço e aliás mostro que a perseverança pode fazer com que todos os objetivos sejam alcançados, independentemente dos obstáculos que temos em nossas vidas. AGRADECIMENTOS A Deus que sempre me guiou no melhor caminho em busca da felicidade. Aos professores Antonio y Claudette, pela amizade e apoio académico, emocional e familiar. Aos meus pais que sempre se esforçaram para me dar o melhor em todas as fases da minha vida, por seus sacrifícios, compreensão, paciência e amor, especialmente nos momentos mais difíceis da minha vida. A minha esposa Cristina, que esteve do meu lado incondicionalmente em todos os momentos da nossa aventura fora do país. À Secretaría Nacional de Educación Superior, Ciencia, Tecnología e Innovación (SENESCYT). Ao meu amigo e professor Luis que confiou em mim desde o início dos meus estudos e que abriu as portas de sua casa quando eu precisei. Aos meus colegas do laboratório Ruy, Mauricio, Alexander, Anderson, pela convivência.

show abstract

Epidemiological investigation of outbreaks of fowl adenovirus infections in commercial chickens in China

Abstract: SummaryOne hundred and five fowl adenovirus (FAdV) strains were isolated in China from 2015 to 2016 from poultry with inclusion body hepatitis (IBH) and hydropericardium syndrome (HPS). Polymerase chain reactions determined that 68 were

Cited by 59 publications

References 23 publications

Enteric Virus Diversity Examined by Molecular Methods in Brazilian Poultry Flocks

Enteric Virus Diversity Examined by Molecular Methods in Brazilian Poultry Flocks

Epidemiological investigation of the novel genotype avian hepatitis E virus and co‐infected immunosuppressive viruses in farms with hepatic rupture haemorrhage syndrome, recently emerged in China

>b<Detection and molecular characterization of enteric viruses in commercial birds >/b<

Contact Info

Product

Resources

About