Bovine respiratory syncytial virus seroprevalence and risk factors in non-vaccinated dairy cattle herds in Brazil
Identifieur interne : 000735 ( Main/Exploration ); précédent : 000734; suivant : 000736Bovine respiratory syncytial virus seroprevalence and risk factors in non-vaccinated dairy cattle herds in Brazil
Auteurs : Ingrid Bortolin Affonso Lux Hoppe ; Andréa Souza Ramos De Medeiros ; Clarice Weis Arns ; Samir Issa SamaraSource :
- BMC Veterinary Research [ 1746-6148 ] ; 2018.
Abstract
The cattle industry is one of the most important Brazilian agribusiness sectors and is a strong contributor to the national economy. Annually about 44.6 million calves are bred, which makes the optimal management of these animals extremely important. Several diseases can affect the initial stages of the bovine production chain, being the bovine respiratory syncytial virus (BRSV) one of the most relevant pathogens. This study aimed to characterize the epidemiology of BRSV infection in dairy cattle herds of São Paulo State, Brazil, using serological and risk factors analyses. For that, 1243 blood samples were collected of animals from 26 farms and a questionnaire about possible risk factors for BRSV prevalence was performed. The obtained blood sera were analyzed using virus neutralization test (VNT).
VNT results showed high BRSV prevalence in dairy cattle herds, reaching 79.5% of seropositivity. The BRSV seroprevalence among studied farms ranged from 40 to 100%. The analysis of risk factors indicated that the age group and the occurrence of coinfection with bovine herpesvirus 1 (BoHV-1) and bovine viral diarrhea virus 1 (BVDV-1) should be associated with a higher prevalence of BRSV, while natural suckling was considered a protective factor.
The study showed that adult animals over 1 year old are an important risk factor for the high seroprevalence of BRSV in herds. The high BRSV prevalence associated with BoHV-1 and BVDV-1 suggests that biosecurity measures should be applied in order to reduce viral dissemination. Additionally, the natural suckling may be an important management to protect calves from high BRSV seroprevalence.
Url:
DOI: 10.1186/s12917-018-1535-8
PubMed: 29945679
PubMed Central: 6020315
Affiliations:
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Brazil</wicri:noCountry></affiliation></author><author><name sortKey="Medeiros, Andrea Souza Ramos De" sort="Medeiros, Andrea Souza Ramos De" uniqKey="Medeiros A" first="Andréa Souza Ramos De" last="Medeiros">Andréa Souza Ramos De Medeiros</name><affiliation><nlm:aff id="Aff1"><institution-wrap><institution-id institution-id-type="ISNI">0000 0001 2188 478X</institution-id><institution-id institution-id-type="GRID">grid.410543.7</institution-id><institution>Faculdade de Ciências Agrárias e Veterinárias (FCAV), Departamento de Medicina Veterinária Preventiva e Reprodução Animal,</institution><institution>Univ Estadual Paulista – UNESP,</institution></institution-wrap>Via de Acesso Prof. Paulo Donato Castellane, km 05, Jaboticabal, São Paulo CEP: 14.884-900 Brazil</nlm:aff><wicri:noCountry code="subfield">São Paulo CEP: 14.884-900 Brazil</wicri:noCountry></affiliation></author><author><name sortKey="Arns, Clarice Weis" sort="Arns, Clarice Weis" uniqKey="Arns C" first="Clarice Weis" 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Estadual Paulista – UNESP,</institution></institution-wrap>Via de Acesso Prof. Paulo Donato Castellane, km 05, Jaboticabal, São Paulo CEP: 14.884-900 Brazil</nlm:aff><wicri:noCountry code="subfield">São Paulo CEP: 14.884-900 Brazil</wicri:noCountry></affiliation></author><author><name sortKey="Medeiros, Andrea Souza Ramos De" sort="Medeiros, Andrea Souza Ramos De" uniqKey="Medeiros A" first="Andréa Souza Ramos De" last="Medeiros">Andréa Souza Ramos De Medeiros</name><affiliation><nlm:aff id="Aff1"><institution-wrap><institution-id institution-id-type="ISNI">0000 0001 2188 478X</institution-id><institution-id institution-id-type="GRID">grid.410543.7</institution-id><institution>Faculdade de Ciências Agrárias e Veterinárias (FCAV), Departamento de Medicina Veterinária Preventiva e Reprodução Animal,</institution><institution>Univ Estadual Paulista – UNESP,</institution></institution-wrap>Via de Acesso Prof. Paulo Donato Castellane, km 05, Jaboticabal, São Paulo CEP: 14.884-900 Brazil</nlm:aff><wicri:noCountry code="subfield">São Paulo CEP: 14.884-900 Brazil</wicri:noCountry></affiliation></author><author><name sortKey="Arns, Clarice Weis" sort="Arns, Clarice Weis" uniqKey="Arns C" first="Clarice Weis" last="Arns">Clarice Weis Arns</name><affiliation><nlm:aff id="Aff2">Instituto de Biologia, Universidade Estadual de Campinas – UNICAMP, Cidade Universitária, Caixa-postal: 6109, Campinas, São Paulo CEP: 13.083-970 Brazil</nlm:aff><wicri:noCountry code="subfield">São Paulo CEP: 13.083-970 Brazil</wicri:noCountry></affiliation></author><author><name sortKey="Samara, Samir Issa" sort="Samara, Samir Issa" uniqKey="Samara S" first="Samir Issa" last="Samara">Samir Issa Samara</name><affiliation><nlm:aff id="Aff1"><institution-wrap><institution-id institution-id-type="ISNI">0000 0001 2188 478X</institution-id><institution-id institution-id-type="GRID">grid.410543.7</institution-id><institution>Faculdade de Ciências Agrárias e Veterinárias (FCAV), Departamento de Medicina Veterinária Preventiva e Reprodução Animal,</institution><institution>Univ Estadual Paulista – UNESP,</institution></institution-wrap>Via de Acesso Prof. Paulo Donato Castellane, km 05, Jaboticabal, São Paulo CEP: 14.884-900 Brazil</nlm:aff><wicri:noCountry code="subfield">São Paulo CEP: 14.884-900 Brazil</wicri:noCountry></affiliation></author></analytic><series><title level="j">BMC Veterinary Research</title><idno type="eISSN">1746-6148</idno><imprint><date when="2018">2018</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background</title><p id="Par1">The cattle industry is one of the most important Brazilian agribusiness sectors and is a strong contributor to the national economy. Annually about 44.6 million calves are bred, which makes the optimal management of these animals extremely important. Several diseases can affect the initial stages of the bovine production chain, being the bovine respiratory syncytial virus (BRSV) one of the most relevant pathogens. This study aimed to characterize the epidemiology of BRSV infection in dairy cattle herds of São Paulo State, Brazil, using serological and risk factors analyses. For that, 1243 blood samples were collected of animals from 26 farms and a questionnaire about possible risk factors for BRSV prevalence was performed. The obtained blood sera were analyzed using virus neutralization test (VNT).</p></sec><sec><title>Results</title><p id="Par2">VNT results showed high BRSV prevalence in dairy cattle herds, reaching 79.5% of seropositivity. The BRSV seroprevalence among studied farms ranged from 40 to 100%. The analysis of risk factors indicated that the age group and the occurrence of coinfection with bovine herpesvirus 1 (BoHV-1) and bovine viral diarrhea virus 1 (BVDV-1) should be associated with a higher prevalence of BRSV, while natural suckling was considered a protective factor.</p></sec><sec><title>Conclusions</title><p id="Par3">The study showed that adult animals over 1 year old are an important risk factor for the high seroprevalence of BRSV in herds. The high BRSV prevalence associated with BoHV-1 and BVDV-1 suggests that biosecurity measures should be applied in order to reduce viral dissemination. Additionally, the natural suckling may be an important management to protect calves from high BRSV seroprevalence.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Baker, Jc" uniqKey="Baker J">JC Baker</name></author><author><name sortKey="Frey, M" uniqKey="Frey M">M Frey</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Larsen, Le" uniqKey="Larsen L">LE Larsen</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Baker, Jc" uniqKey="Baker J">JC Baker</name></author><author><name sortKey="Ames, Tr" uniqKey="Ames T">TR Ames</name></author><author><name sortKey="Belknap, Eb" uniqKey="Belknap E">EB Belknap</name></author><author><name sortKey="Dubovi, Ej" uniqKey="Dubovi E">EJ Dubovi</name></author><author><name sortKey="Bryson, Dg" uniqKey="Bryson D">DG Bryson</name></author><author><name sortKey="Kelling, Clbrsv" uniqKey="Kelling C">CLBRSV 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sort="Hoppe, Ingrid Bortolin Affonso Lux" uniqKey="Hoppe I" first="Ingrid Bortolin Affonso Lux" last="Hoppe">Ingrid Bortolin Affonso Lux Hoppe</name><name sortKey="Medeiros, Andrea Souza Ramos De" sort="Medeiros, Andrea Souza Ramos De" uniqKey="Medeiros A" first="Andréa Souza Ramos De" last="Medeiros">Andréa Souza Ramos De Medeiros</name><name sortKey="Samara, Samir Issa" sort="Samara, Samir Issa" uniqKey="Samara S" first="Samir Issa" last="Samara">Samir Issa Samara</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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