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

Brasil, Nathalia D. Assis; Hinnah, Fabiane L.; Fiss, Letícia; Sallis, Eliza Simone Viégas; Grecco, Fabiane Borelli; Ladeira, Sílvia Regina Leal; Marcolongo-Pereira, Clairton; Schild, Ana Lúcia

doi:10.1590/s0100-736x2013000600010

Cited by 7 publications

(9 citation statements)

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“…During this study, concomitant bacterial infections due to M. haemolytica and P. multocida were detected in the lung of steers with bronchopneumonia, suggesting that these pathogens may be endemic at this feedlot. These results are quite different from those of other studies done in Brazil [9][10][11]49], and in beef cattle feedlots from Oklahoma, USA [39], Ontario, Canada [29], and in dairy herds from Quebec, Canada [50] in which there were coinfections with viral and bacterial pathogens and the viral pathogens probably predisposed the animals to a secondary bacterial disease. Therefore, we suggest that the bacterial pathogens at this feedlot were most likely associated with other stresses, such as vaccination and transport, since these pathogens were identified in steers that were less than 32 days-on feed.…”

Section: Discussioncontrasting

confidence: 93%

“…Although BRSV was identified in several feedlots from the state of Rio Grande do Sul [11], these authors only investigated the occurrence of this viral pathogen. Recently, our group has identified single and mixed associations of H. somni with bovine alphahepersvirus-1 in feedlot cattle with BRD from northern Paraná [9], and coinfections of H. somni with BRSV in feedlot cattle from the state of São Paulo [49].…”

Section: Discussionmentioning

confidence: 99%

“…BRD is the most important cause of livestock mortality in the USA in feedlots and is responsible for 16% of all non-predator losses of beef cattle [8]. Data relative to the occurrence of BRD in Brazil is sparse, with Histophilus somni [9,10], the bovine respiratory syncytial virus, BRSV [10,11], bovine viral diarrhea virus (BVDV), bovine coronavirus (BCoV), Pasteurella multocida, and Mycoplasma bovis [10] being identified as the principal contributory agents. However, there is no data relative to the economic impacts of BRD on beef cattle feedlots from Brazil.…”

Section: Introductionmentioning

confidence: 99%

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Bovine respiratory disease complex associated mortality and morbidity rates in feedlot cattle from southeastern Brazil

Baptista

Rezende

Fonseca

et al. 2017

J Infect Dev Ctries

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Introduction: A feedlot is an intensive farming system for finishing livestock. Bovine respiratory disease (BRD) is a cause of morbidity and mortality in beef cattle, especially in feedlots. Methodology: This study investigated the morbidity and mortality of BRD in a beef cattle feedlot in southeastern Brazil using: clinical diagnoses, therapy, morbidity, and mortality. Pulmonary fragments were collected from five steers, on feed from 3-32 days, with lesions of pneumonia for identification of BRD infectious agents PCR. Results: 188,862 steers were on feed and morbidity was 7.05% (13,315/188,862), mortality 0.64% (1,214/188,862). The causes of morbidity were: BRD (6.13%), lameness (0.29%), trauma (0.21%), clostridiosis (0.13%) and polioencephalomalacia, PEM (0.12%). The causes of mortality were: BRD (0.21%), trauma (0.17%), and clostridiosis (0.13%). When all sick cattle were considered (n=13,315), BRD (86.9%) was the principal cause of morbidity, followed by lameness (4.13%), trauma (3.05%), and clostridiosis (1.82%). The cost of BRD-associated cattle mortality and morbidity was estimated at $14,334.00/10,000 and $16,315.40/10,000 respectively. It was projected that the economic effects due to BRD-associated morbidity in Brazil were $6.31 million/annum, while losses due to mortality were $5.54 million, resulting in an annual loss of $11.85 million. Coinfections in cattle with pneumonia due to Mannheimia haemolytica and Pasteurella multocida were identified in 4/5 steers tested. Conclusions: This is the first longitudinal study that investigated the incidence of BRD in feedlot cattle from Brazil, and the results herein described indicate that BRD contributed significantly to the development of mortality and morbidity of cattle on feed.

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Section: Discussioncontrasting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bovine respiratory disease complex associated mortality and morbidity rates in feedlot cattle from southeastern Brazil

Baptista

Rezende

Fonseca

et al. 2017

J Infect Dev Ctries

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“…[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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“…In a 12-year retrospective study (Brasil et al, 2013) done in Rio Grande do Sul with 306 cattle, respiratory infections were responsible for 15% of 33 calves necropsied (Brasil et al, 2013). Age ranged from 2 days to 12 months, with calves up to 3 months old (51.5%; 17/33) being the most affected (Brasil et al, 2013).…”

Section: Table 1 Microorganisms Frequently Associated With Bovine Respiratory Disease In Brazilmentioning

confidence: 99%

Bovine respiratory disease in Brasil: a short review

Castro¹,

Oliveira²,

Headley³

2021

Semina: Ciênc. Agrár.

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The bovine respiratory disease (BRD) complex is a multifactorial and multietiological disease entity described in all geographic regions of Brazil. This brief review discusses aspects related to epidemiology, etiologic agents, clinical and pathological manifestations, and challenges in the diagnosis of BRD in Brazil. The main infectious disease agents associated with respiratory outbreaks in cattle from Brazil are bovine alphaherpesvirus type 1, bovine viral diarrhea virus, bovine respiratory syncytial virus, and Mycoplasma bovis. Ovine gammaherpesvirus-2 and HoBi-like pestivirus have been associated with the development of pneumonia in adult cattle and calves, respectively in Brazil, and should be considered as possible causes of BRD. Additionally, studies using epidemiological data, histopathological and molecular associations with morbidity and mortality should be carried out in Brazil, to demonstrate the real impacts of BRD on livestock.

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

Cited by 7 publications

References 13 publications

Bovine respiratory disease complex associated mortality and morbidity rates in feedlot cattle from southeastern Brazil

Bovine respiratory disease complex associated mortality and morbidity rates in feedlot cattle from southeastern Brazil

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

Bovine respiratory disease in Brasil: a short review

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