Prevalence, outcome, and health consequences associated with persistent infection with bovine viral diarrhea virus in feedlot cattle

Loneragan, Guy H.; Thomson, Daniel U.; Montgomery, Donald L.; Mason, Gary L.; Larson, Robert L.

doi:10.2460/javma.2005.226.595

Cited by 115 publications

(101 citation statements)

References 10 publications

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“…This percentage is similar to the feedlot deaths previously reported, with a 2.5% BVDV IHC positive test result in fatal cases. 20 The relationship between recovery of infectious agents with clinical data, such as FDO, TI, number of treatments, number of antibiotics, and day of death, had numerous positive or negative differences for the variables that were evaluated (P , 0.05). Results from the current study differ somewhat in that cases of pneumonia had a mean FDO of 32.65 days, mean TI of 29.15 days, mean treatments of 2.65, mean number of antibiotics of 1.89, and mean day of death of 61.81 days.…”

Section: Discussionmentioning

confidence: 99%

“…[9][10][11][12]20 The distribution of BVDV subtypes in the study suggests possible variation in pathogenicity of different BVDV subtypes. BVDV-1a NCP and BVDV1b NCP strains had an earlier FDO compared with cattle that tested negative for these viruses.…”

Section: Discussionmentioning

confidence: 99%

“…The etiologic agents associated with feedlot pneumonias include viruses , and Mycoplasma spp. [1][2][3][4][5][6][8][9][10][11][12][13][14][15][16][17][18]20,21,24,25,27,28 Several previous studies examined the presence of specific BRD lesions in feedlot mortalities, along with the detection of infectious agents. Multiple publications came from an in-depth year-long study of feedlot diseases in Colorado in the 1970s.…”

Section: Introductionmentioning

confidence: 99%

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Lung Pathology and Infectious Agents in Fatal Feedlot Pneumonias and Relationship with Mortality, Disease Onset, and Treatments

Fulton¹,

Blood

Panciera³

et al. 2009

J VET Diagn Invest

124

160

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lung Pathology and Infectious Agents in Fatal Feedlot Pneumonias and Relationship with Mortality, Disease Onset, and Treatments

Fulton¹,

Blood

Panciera³

et al. 2009

J VET Diagn Invest

124

160

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“…Inst. Biol., São Paulo, v.79, n.4, p.495-502, out./dez., 2012 a grande diversidade antigênica e a existência de dois genótipos genética e antigenicamente distintos: BVDv tipos 1 e 2 (BVDv-1 e BVDv-2) (Donis, 1995;Botton et al, 1998a;Loneragan et al, 2005).…”

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Frequência e fatores associados à infecção pelo vírus da diarreia viral bovina em bovinos leiteiros não vacinados no Estado do Maranhão

et al. 2012

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RESUMOA frequência de anticorpos contra o vírus da diarreia viral bovina (BVDv) foi pesquisada na bacia leiteira do Estado do Maranhão. Amostras de soro sanguíneo de 920 fêmeas bovinas não vacinadas contra a diarreia viral bovina (bovine viral diarrhea, BVD) foram analisadas pelo método de ELISA indireto. O estudo foi realizado em 92 propriedades leiteiras, pertencentes a 23 municípios localizados nas regionais de Açailândia, Bacabal, Ilha de São Luís, Imperatriz e Pedreiras. As amostras de soro foram coletadas de fêmeas com ou sem sinais clínicos de infecção pelo vírus (bovine viral diarrhea virus, BVDv) e estratificadas segundo a faixa etária (> 3 anos, entre 3 a 7 anos e > 7anos). Durante a coleta das amostras, aplicou-se questionário epidemiológico para investigar fatores que poderiam estar associados à infecção. Das 920 amostras de soro analisadas, 65,66% (n = 604) foram reagentes. Nas regionais obtiveram-se frequências de anticorpos de 67,5%, 53,57%, 80%, 63,75% e 74%, para Ilha de São Luís, Imperatriz, Açailândia, Pedreiras e Bacabal, respectivamente. Nos 23 municípios amostrados foram encontrados animais reagentes, com detecção de bovinos sorologicamente positivos em 94,57% das propriedades. Das variáveis consideradas fatores de risco para a infecção pelo BVDv, a presença de suínos, ausência de assistência veterinária, uso de monta natural ou de monta natural associada à inseminação artificial e diarréia, apresentaram significância estatística (P < 0,05) associada à soropositividade para BVDv. Os resultados obtidos demonstram níveis elevados de frequência do BVDv no rebanho bovino de aptidão leiteira do Estado do Maranhão. PALAVRAS-CHAVE: BVD, BVDv, anticorpos, ELISA, bacia leiteira. ABSTRACT FREQUENCY AND FACTORS ASSOCIATED WITH BOVINE VIRAL DIARRHEA VIRUS INFECTION IN NONVACCINATED DAIRY COWS IN THE STATE OF MARANHÃO, BRAZIL.The frequency of antibodies against the bovine viral diarrhea virus (BVDv) was studied in a dairy herd of the state of Maranhão, Brazil. Blood serum samples from 920 cows not vaccinated against bovine viral diarrhea (BVD) were analyzed through the indirect ELISA method. The study was carried out on 92 dairy farms from 23 districts located in the regions of Açailândia, Bacabal, São Luiz Island, Imperatriz, and Pedreiras. The serum samples were collected from cows with or without BVDV infection symptoms and classified according to age (> 3 years, 3-7 years, and > 7 years old). An epidemiological questionnaire was applied during sample collection to elucidate the factors which could be associated with the infection. From the 920 serum samples analyzed, 65.66% (n = 604) were reagent. The antibody frequency obtained was 67.5%, 53.57%, 80%, 63.75%, and 74%, for São Luiz Island, Imperatriz, Açailândia, Pedreiras and Bacabal, respectively. In the 23 districts studied, serologically positive cows were found on 94.57% of the farms. From the variables considered as risk factors for BVDv infection, the presence of swine, lack of veterinary assistance, use of natural breeding or natural breedin...

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“…This depends on the time of infection (gestation period) and exposure of young cattle to PI calves. Calves with high levels of immunity to the BVDV were associated with increased protection from bovine respiratory diseases (BRD), expressed as lower BRD morbidity rates and treatment costs, and required fewer treatments for BRD (Baker 1995, Fulton et al 2002, Loneragan et al 2005. To achieve sufficient biosecurity it is necessary to manage BVDV transmission, especially with regard to PI calf identification in dairy and beef herds.…”

Section: Introductionmentioning

confidence: 99%

Detection of the bovine viral diarrhoea virus (BVDV) in young beef cattle in eastern and south-eastern regions of Poland

Wernicki¹,

Urban‐Chmiel²,

Stęgierska³

et al. 2015

Polish Journal of Veterinary Sciences

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In view of the scarcity of information concerning viral diarrhoea virus (BVDV) infections in beef cattle in Poland, the aim of this study was to evaluate the presence of the BVDV in young beef cattle from selected herds in eastern and south-eastern regions of Poland. The material consisted of 78 sera obtained from beef cattle from 15 farms, aged 6-12 months. The anti-BVDV antibody level in the sera was estimated with an ELISA kit, and detection of the BVDV was carried out by standard PCR and one step Real-Time RT-PCR. The ELISA results showed a high degree (80%) of positivity in 5 of the 78 samples. In 7 samples the degree of positivity was in the very low range: ≤40%. Of the 78 cDNA samples, the presence of genetic material with a length of 288 bp was found by standard PCR in 3 sera. The genetic material of BVDV was also found in the sera of the same three calves by Real-Time HRM PCR. BVDV infection in young beef cattle in south-eastern Poland is not a significant problem. This was confirmed by the positive ELISA results for 6.4% of the animals and the positive PCR results for 3.9%. The percentage of positive beef herds was about 8.6%. However, due to the severe nature of the disease and rapid transmission of the virus, regular monitoring of BVDV should be carried out.

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Prevalence, outcome, and health consequences associated with persistent infection with bovine viral diarrhea virus in feedlot cattle

Cited by 115 publications

References 10 publications

Lung Pathology and Infectious Agents in Fatal Feedlot Pneumonias and Relationship with Mortality, Disease Onset, and Treatments

Lung Pathology and Infectious Agents in Fatal Feedlot Pneumonias and Relationship with Mortality, Disease Onset, and Treatments

Frequência e fatores associados à infecção pelo vírus da diarreia viral bovina em bovinos leiteiros não vacinados no Estado do Maranhão

Detection of the bovine viral diarrhoea virus (BVDV) in young beef cattle in eastern and south-eastern regions of Poland

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