Enteric Virus Diversity Examined by Molecular Methods in Brazilian Poultry Flocks

Overview

Journal Vet Sci

Publisher MDPI

Specialty Veterinary Medicine

Date 2018 Mar 30

PMID 29596389

Citations 15

Authors

David I De la Torre

Luis F Nunez

Claudete S Astolfi-Ferreira

Antonio J Piantino Ferreira

Affiliations

Soon will be listed here.

Abstract

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.

Citing Articles

Fowl adenovirus 8a isolated from chickens with runting and stunting syndrome induces inclusion body hepatitis and hepatitis-hydropericardium syndrome in chicken embryos.

Nunez L, Santander-Parra S, Catroxo M, Astolfi-Ferreira C, Loor-Giler A, Piantino Ferreira A Vet World. 2025; 17(11):2556-2566.

PMID: 39829654 PMC: 11736379. DOI: 10.14202/vetworld.2024.2556-2566.

Molecular Characterization of the Chicken Parvovirus Based on VP1 Gene Circulating in Brazilian Chicken Flocks.

Nunez L, Santander-Parra S, Astolfi-Ferreira C, Loor-Giler A, Ferreira A Microorganisms. 2024; 12(6).

PMID: 38930446 PMC: 11205413. DOI: 10.3390/microorganisms12061065.

Development of a fast and sensitive RT-qPCR assay based on SYBR® green for diagnostic and quantification of Avian Nephritis Virus (ANV) in chickens affected with enteric disease.

Loor-Giler A, Castillo-Reyes S, Santander-Parra S, Caza M, Kyriakidis N, Ferreira A BMC Vet Res. 2024; 20(1):33.

PMID: 38291450 PMC: 10826264. DOI: 10.1186/s12917-024-03881-8.

Molecular characterization of chicken astrovirus and pathogenicity of a novel isolate in China.

Han X, Yin L, Liang X, Liang H Front Microbiol. 2023; 14:1280313.

PMID: 38149277 PMC: 10751203. DOI: 10.3389/fmicb.2023.1280313.

Rotavirus A and D circulating in commercial chicken flocks in southeastern Brazil.

Dias J, Pinheiro M, Petrucci M, Travassos C, Mendes G, Santos N Vet Res Commun. 2023; 48(2):743-748.

PMID: 37878188 DOI: 10.1007/s11259-023-10246-3.

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