Infecção natural pelo Vírus Sincicial Respiratório Bovino (BRSV) no Estado de Alagoas

Peixoto, Paulo Vargas; Mota, Rinaldo Aparecido; Brito, Marilene F.; Corbellini, Luís Gustavo; Driemeier, David; Souza, Maria Izabel de

doi:10.1590/s0100-736x2000000400008

Cited by 8 publications

(6 citation statements)

References 8 publications

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“…Em Alagoas (AL) a doença foi, também, diagnosticada em bezerros de raças leiteiras filhos de animais importados, que chegaram ao país, presumivelmente, já infectados pelo virus (Peixoto et al 2000).…”

Section: Introductionunclassified

Doenças respiratórias em bezerros na região sul do Rio Grande do Sul: estudo retrospectivo de 33 surtos

Brasil¹,

Hinnah²,

Fiss³

et al. 2013

Pesq. Vet. Bras.

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Foram estudados 33 surtos de pneumonia em bovinos jovens na área de influência do Laboratório Regional de Diagnóstico (LRD) da Faculdade de Veterinária da Universidade Federal de Pelotas (UFPel) entre os anos de 2000 e 2011. Foram diagnosticados 18 surtos de pneumonia (54,54%) em bovinos de raças leiteiras, Holandês ou Jersey e 13 surtos (39,39%) em gado de corte ou cruzas de gado de corte. A morbidade variou entre 0,06%-100% e a mortalidade foi de 0,06%-34,6%. A doença ocorreu igualmente em todas as estações do ano e foi mais frequente em bezerros de 1-3 meses totalizando 13 surtos. Sete surtos ocorreram em bovinos entre 4-6 meses, sete entre 7-12 meses e seis surtos ocorreram em bezerros de 1-29 dias. Pneumonia enzoótica pela infecção pelo vírus sincicial respiratório bovino (BRSV) com lesões histológicas de broncopneumonia, pneumonia intersticial e presença de células sinciciais foi mais frequente em bovinos de raças de corte com dez surtos (58,8%); seis surtos dessa enfermidade ocorreram em raças de leite (35,2%). O diagnóstico foi confirmado por imuno-histoquímica em sete casos. Os sinais clínicos da maioria dos casos de pneumonia observados caracterizaram-se por dispneia, emagrecimento, apatia, tremores, bruxismo, desidratação, respiração ruidosa, tosse, corrimento nasal seroso ou mucopurulento, decúbito e morte. As lesões macroscópicas caracterizaram-se por presença de áreas de consolidação vermelho-escuras, edema e enfisema nas regiões crânio-ventrais dos lobos pulmonares cardíaco e apical ou pneumonia intersticial com distribuição difusa, edema e enfisema. Histologicamente, as lesões pulmonares eram variáveis. Broncopneumonia necrossupurativa difusa acentuada com hiperplasia de pneumócitos tipo II e edema intersticial e alveolar foi observada em 15 casos. Os resultados deste trabalho demonstram que as pneumonias são importantes causas de perdas econômicas em bovinos jovens na região de influência do LRD. Deve ser destacado que a pneumonia enzoótica devido a infecção pelo BRSV é importante tanto em bovinos de corte como de leite independente da forma de criação.

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Section: Introductionunclassified

Doenças respiratórias em bezerros na região sul do Rio Grande do Sul: estudo retrospectivo de 33 surtos

Brasil¹,

Hinnah²,

Fiss³

et al. 2013

Pesq. Vet. Bras.

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“…Animals showed fever, respiratory distress, coughing, a serous nasopharyngeal discharge, tearing and salivation. Similarly, a spontaneous BRSV infection in Brazilian cattle was described by Peixoto et al (2000) who referred fever, dry cough and serous ocular discharge, besides loud and severe breathing sounds detected by pulmonary auscultation. In the present study, the presence of Ab-BRSV was associated to serous nasal discharge, confirming the importance of this clinical sign on BRSV infections.…”

Section: Discussionmentioning

confidence: 87%

Serological investigation of antibodies against respiratory viruses in calves from Brazilian family farming and their relation to clinical signs of bovine respiratory disease

et al. 2018

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Bovine respiratory disease (BRD) is responsible for economic losses in cattle production. Viruses are categorized as primary etiological agents. The aims of this study were to evaluate the presence of antibodies against bovine viral diarrhea virus (BVDV), bovine herpes virus type 1 (BoHV-1), and bovine respiratory syncytial virus (BRSV) in healthy and BRD calves from family farming in relation to clinical signs of BRD. Hundred and forty-five calves were randomly selected and physical examination was performed. Only 123 animals were classified as healthy and BRD calves. Antibodies were evaluated by virus neutralization test. Person’s Chi-square test and Fisher’s exact test were performed as univariate analysis. Binary Logistic Regression was applied as multivariate analysis. Variables with P<0.10 were considered statistically significant. Variables with 0.15<P<0.10 were considered as statistical tendencies. Antibodies against BoHV-1, BVDV, and BRSV were detected in 32%, 23% and 37% animals. Antibodies against both three viruses were detected in 26.8% of calves. The presence of antibodies against BRSV were associated to normal heart rates (P=0.018) and unilateral airflow (P=0.035). Tendency was observed to unilateral airflow (P=0.06) Statistical tendencies were observed to Ab-BoHV-1 and body temperature (P=0.119) and breathing pattern (P=0.123). The profile of antibodies against respiratory viruses in calves from Brazilian family farming was firstly described. The results confirmed the importance of some clinical signs to viral infection.

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“…A designação de pneumonia enzoótica ou complexo respiratório é dada a uma série de agentes etiológicos, dentre eles, o vírus respiratório sincicial bovino, vírus parainfluenza tipo 3, Mannheimia haemolytica, Pasteurella multocida, Histophilus somni, Ureaplasma diversum e algumas espécies de Mycoplasma spp. [12,21,30]. Estes agentes etiológicos associados aos fatores ambientais, nutricionais e imunológicos desencadeiam um conjunto de sinais clínicos caracterizados por febre, tosse, secreção nasal e respiração ruidosa [4], sinais estes evidenciados nos bovinos deste estudo, acrescido de lacrimejamento e muco nas fezes.…”

Section: Discussionunclassified

Cattle and Sheep Diseases Diagnosed in the State of Tocantins - Brazil

Oliveira

Ramos

Cunha

et al. 2019

Acta Scientiae. Vet.

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Background:Knowing the different diseases that affect the herds of a region is a fundamental necessity, because sanity is one of the main factors limiting animal production. Several studies have reported the diseases affecting the animals of various regions of Brazil; however, no such study was carried out in the state of Tocantins so far. Thus, the objective of this work is to report the main diseases diagnosed in cattle and sheep in the central and northern regions of the state of Tocantins, between January 2011 and December 2015. Materials, Methods & Results:The records and reports of the cattle and sheep treated by the clinicians and pathologists of the Ruminants Medical Clinic (SCMR) of the University Veterinary Hospital (HVU), School of Veterinary Medicine and Zootecnia (EMVZ), University Federal of Tocantins (UFT) during the study period were evaluated. The cases were classified into two categories, conclusive and inconclusive; the cases with conclusive diagnosis were classified according to the etiology and the organic systems involved. In the period of five years, 697 cattle and sheep were treated in the SCMR. The diagnoses were made using epidemiological, clinical, and pathological data, and in some cases, using complementary tests. Among the 697 cases reviewed, 692 (99.2%) and 5 (0.8%) cases were diagnosed conclusively and inconclusively, respectively. The most affected system was the digestive system, which accounted for 260 (37.6%) cases; this was followed by the locomotor 130 (18.8%) cases, nervous 56 (8.1%) cases, reproductive 57 (8.2%) cases, urinary 50 (7.2%) cases, skin 16 (2.3%) cases, muscular 11 (2%) cases, respiratory 34 (4.9%) cases, hemolymphopoietic 28 (3.5%) cases, endocrine 24 (3.5%) cases, sense organs 22 (3.2%) cases, and cardiovascular 4 (0.6%) cases. A total of 220 (31.6%) parasitic, 202 (29%) infectious, 106 (15.2%) toxic, 96 (13.8%) nutritional, 52 (7.5%) by physical agents, and 6 (0.8%) congenital/hereditary diseases were identified. Diseases of neoplastic, metabolic, and inconclusive nature represented 15 (2.1%) cases. Discussion: In this study, the most affected organic system was the digestive system. The disturbances of the digestive system in production animals are reported to comprise a group of important diseases, and they are responsible for large economic losses. Parasitic, infectious, and toxic diseases were more frequently diagnosed, a result similar to those of other studies carried out in Brazil. Haemonchosis was the most frequently occurring parasitic disease and occurrence in sheep. The characteristic clinical signs such as submandibular edema and pallor of the mucosa/carcass and the visualization of the abomasal mucosa in adult specimens on necropsy enabled the diagnosis of this disease. The foot injury were the most frequent disease among the others of the infectious order and affected the sheep. Such lesions are characterized by inflammation and ulceration of the skin of the digits, in which numerous bacteria are isolated. The most frequent toxic disorder was bo...

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Infecção natural pelo Vírus Sincicial Respiratório Bovino (BRSV) no Estado de Alagoas

Cited by 8 publications

References 8 publications

Doenças respiratórias em bezerros na região sul do Rio Grande do Sul: estudo retrospectivo de 33 surtos

Doenças respiratórias em bezerros na região sul do Rio Grande do Sul: estudo retrospectivo de 33 surtos

Serological investigation of antibodies against respiratory viruses in calves from Brazilian family farming and their relation to clinical signs of bovine respiratory disease

Cattle and Sheep Diseases Diagnosed in the State of Tocantins - Brazil

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