, Volume 29, Issue 1, pp 83–88 | Cite as

Molecular characterization of fowl adenovirus group I in commercial broiler chickens in Brazil

  • David De la Torre
  • Luis F. N. Nuñez
  • Silvana H. Santander Parra
  • Claudete S. Astolfi-Ferreira
  • Antonio J. Piantino Ferreira
Original Article


Avian adenovirus has been reported in many countries and is an infectious agent related with inclusion body hepatitis, hepatitis-hydropericardium syndrome (HHS), and respiratory and enteric conditions in chickens worldwide. The objective of this study was to detect and establish the molecular sequences of the hexon gene from the avian adenovirus strains of group I (FAdV-I) isolated from birds with hepatitis-hydropericardium syndrome (HHS), malabsorption syndrome and runting-stunting syndrome, to characterize the serotype of virus affecting commercial flocks in Brazil. Molecular characterization was performed by polymerase chain reaction (PCR), using specific primers to amplify the Loop 1 (L1) variable region of the hexon gene in the FAdV-I genome and subsequent sequencing of the PCR product for each positive sample. The results have revealed the presence of the FAdV-8a, FAdV-8b, and FAdV-11 serotypes circulating in Brazilian chicken flocks. Phylogenetic analysis grouped these sequences into three (3) distinct groups, 14 samples were aligned with the FAdV-11 group, three (3) samples in the FAdV-8b group and one (1) sample in the FAdV-8a group. The serotypes FAdV-8a, FAdV-8b, and FAdV-11 are circulating in Brazilian chicken flocks. Therefore, these results are very important for improvement biosecurity measurements and vaccine production.


Avian adenovirus IBH HHS RSS Serotypes PCR 



This work was supported by Grants from the FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo—Grants #2013/08560-5 and 2015/09348-5) and CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnológico—Grant #453920/2014-4). Also, the authors would like to thank the poultry companies in Brazil that generously sent the samples for the development of this study and for the diagnosis of enteric viruses.

Supplementary material

13337_2018_430_MOESM1_ESM.docx (30 kb)
Supplementary material 1 (DOCX 30 kb)


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Copyright information

© Indian Virological Society 2018

Authors and Affiliations

  1. 1.Department of Pathology, School of Veterinary MedicineUniversity of São PauloSão PauloBrazil
  2. 2.Faculty of Veterinary Medicine and Animal SciencesCentral University of EcuadorQuitoEcuador

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