Bovine respiratory syncytial virus: 
first serological evidence in Uruguay

Costa, Mauro; García, Laura E.; Yunus, Abdul S.; Rockemann, Daniel D.; Samal, Siba K.; Cristina, Juan

doi:10.1051/vetres:2000119

Cited by 7 publications

(6 citation statements)

References 18 publications

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“…I and II). The high proportion of herds with the BRSV antibody agrees with the results reported in Brazil [4], the United States [6], England [18], Canada [25], and, more recently, Uruguay [7].…”

Section: Discussionsupporting

confidence: 89%

Dot-enzyme linked immunosorbent assay as an alternative technique for the detection of bovine respiratory syncytial virus (BRSV) antibodies

et al. 2002

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-A dot-ELISA test for the detection of anti-BRSV antibodies is described. The objective of this study was the standardisation of a test as a fast, inexpensive and effective alternative to detect anti-BRSV antibodies. Its sensitivity, specificity and usefulness were compared to a commercial ELISA-kit and to the standard serum neutralisation (SN) test. The standardisation of the technique was done using nitrocellulose disks soaked with a viral sample isolated in Brazil, BRSV-25-BR. The best results were obtained when the disks were sensitised with a purified antigen at a concentration of 0.7 µg/disk and the bovine serum was diluted 1: 200. The experiment used 423 samples of bovine serum collected in the main cattle breeding centres in Brazil.

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Section: Discussionsupporting

confidence: 89%

Dot-enzyme linked immunosorbent assay as an alternative technique for the detection of bovine respiratory syncytial virus (BRSV) antibodies

et al. 2002

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“…Similarities were observed among the results found at the present study and those previously obtained by others conducted in Brazil [ 18 – 20 ]. In Latin America countries, equivalents prevalences of BRSV have also been reported [ 12 , 14 – 16 ], as well as difficulties in detecting the risk factors involved in the dissemination of the agent, even using different forms of sampling and analyzing a considerable number of variables. Thus, the dynamics of infection may differ even in a particular country or geographic area [ 26 ].…”

Section: Discussionmentioning

confidence: 99%

“…Similar studies have also been performed in some Latin American countries and they showed that most of the animals probably have already been exposed to the virus with consequent high BRSV prevalence in cattle herds. In these countries, herd size, age group, presence of bordering farms, herd type and geographic location of the farms were the main risk factors associated with BRSV infection [ 12 – 16 ].…”

Section: Introductionmentioning

confidence: 99%

Bovine respiratory syncytial virus seroprevalence and risk factors in non-vaccinated dairy cattle herds in Brazil

et al. 2018

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BackgroundThe 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).ResultsVNT 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.ConclusionsThe 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.

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“…La prevalencia encontrada (32.47%) se encuentra por debajo de los porcentajes reportados en otros países como Uruguay, Brasil y Suecia (Beaudeau et al, 2010;Costa et al, 2000;Driemier et al, 1997); incluso en México (Barajas, 1995;Córdova et al, 2009;Solís-Calderon et al, 2007). Este tipo de estudios permite que se puedan tomar medidas preventivas para evitar un mayor grado de dispersión del virus en los hatos bovinos del estado de Campeche.…”

Section: Resultados Y Discusionunclassified

Epidemiologia Del VRSB Y Factores De Riesgo en Hatos Bovinos Del Estado De Campeche, Mexico

Encalada Mena,

Cruz-Tamayo,

Méndez-Ortiz

et al. 2016

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High seroprevalence in Yucatan and proximity to the state of Campeche make it necessary to determine the seroprevalence and risk factors of bovine respiratory syncytial virus (VRSB) in the state of Campeche, Mexico. Thus the objective of the present work was to determine the seroprevalence and risk factors bovine respiratory syncytial virus (BRSV) of the state of Campeche, Mexico. The sampled of 36 cattle herds (842 sera) were analyzed by indirect ELISA kit, in the 11 municipalities of Campeche. A survey to obtain risk factors (sex, age of animals, number of animals grazing density, management system, presence of sheep on the farm and access to the roadside) was applied and calculated X2 for each variable considered. Of the total number of samples analyzed (842), 273 were positive (32.47%). The prevalence ranges found ranged from 0% to 84%, so in 9 of the herds there were no positive samples, indicating a 75% (27/36) of dispersion of this virus. X2 analysis indicated that all variables were significant and are risk factors regarding with respect to the variable seroprevalence of BRSV. The results indicate a wide circulation of BRSV and we suggest implement recommendations that will enable a lower spread of this virus in the cattle population.

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Bovine respiratory syncytial virus: first serological evidence in Uruguay

Cited by 7 publications

References 18 publications

Dot-enzyme linked immunosorbent assay as an alternative technique for the detection of bovine respiratory syncytial virus (BRSV) antibodies

Dot-enzyme linked immunosorbent assay as an alternative technique for the detection of bovine respiratory syncytial virus (BRSV) antibodies

Bovine respiratory syncytial virus seroprevalence and risk factors in non-vaccinated dairy cattle herds in Brazil

Epidemiologia Del VRSB Y Factores De Riesgo en Hatos Bovinos Del Estado De Campeche, Mexico

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