Causas de morte em vacas leiteiras no Rio Grande do Sul

Mello, Lauren Santos de; Bianchi, Matheus Viezzer; Bandinelli, Marcele Bettim; Sonne, Luciana; Driemeier, David; Pavarini, Saulo Petinatti

doi:10.1590/s0100-736x2017000900003

Cited by 12 publications

(11 citation statements)

References 28 publications

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“…Bovine lymphoma is the most common neoplasm in milk-producing regions and is an important cause of economic loss in this industry in several parts of the world (Jacobs et al 2002, Trainin & Brenner 2005. This neoplasm was appointed as one of the main causes of death in dairy cows in southern Brazil, in addition to being the most frequent neoplastic disease (Mello et al 2017). All the cattle studied were adult and presented a multicentric distribution of lymphoma.…”

Section: Discussionmentioning

confidence: 99%

Clinical and pathological aspects of bovine lymphoma affecting the spinal cord

et al. 2019

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Clinical and pathological features of bovine lymphoma involving the spinal cord were evaluated through a retrospective study of the necropsy database from 2005 to 2017. Thirty-four cases of bovine lymphoma were found, 24 of which had central nervous system involvement restricted to the spinal cord. All cattle were Holstein cows 2.5-12 years-old (median age, six years-old). The clinical course was 7-21 days, and the main neurological sign was pelvic limb paresis (81.8%). The lymphoma often affected the spinal cord in a multifocal manner. Lumbar segments were the mostly affected sites (23/24), followed by the sacral segments and cauda equina (20/24), cervical (5/24) and thoracic (5/24) segments. Tumors were in the epidural space, peripheral to the pachymeninges (extradural) and between layers of adipose tissue. In addition, two cases had progressive hemorrhagic myelomalacia. Further organs affected included the lymph nodes (100%), abomasum (79.2%), heart (75%) and kidneys (45.8%). Microscopically, all lymphomas had a diffuse pattern, with no meningeal or medullar infiltration. According to the REAL/WHO classification, all these neoplasms were mature B-cell lymphomas. Diffuse large B-cell lymphoma (DLBCL) was observed in 95.8% (23/24) of the cases. The following subtypes were observed in the DLBCL group in descending order: immunoblastic (60.9%, 14/23), centroblastic (26.1%, 6/23), anaplastic (8.7%, 2/23) and T-cell rich (4.3%, 1/23).

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Section: Discussionmentioning

confidence: 99%

Clinical and pathological aspects of bovine lymphoma affecting the spinal cord

et al. 2019

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“…Overall, lymphoma (enzootic bovine leucosis) and squamous cell carcinoma are the most common detected bovine neoplasms. The latter may occur in the upper alimentary tract, the eyes and adnexa, and in the vulva (Lucena et al 2011, Rosa et al 2012, Carvalho et al 2014, Mello et al 2017, Reis et al 2017.…”

Section: Introductionmentioning

confidence: 99%

Primary hepatic neoplasms in cattle

et al. 2020

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Primary hepatic neoplasms are mostly detected in cattle as incidental findings in slaughterhouses or diagnosed at the necropsy, wherein it may be related to the cause of death. A proper characterization of primary hepatic neoplasms is essential to provide an accurate diagnosis, especially at the slaughter lines, in order to reduce erroneous condemnations. This work aimed to characterize the gross, histological, and immunohistochemical features of primary liver neoplasms detected in slaughtered cattle in Southern Brazil. Nineteen primary hepatic neoplasms were identified. Grossly, these lesions were classified according to their distribution, as focal, multifocal, or diffuse. Histologically, the shape and arrangement of the cells, as well as possible malignant features were evaluated. Immunohistochemistry (IHC) was also performed for biliary epithelium (anti-CK7) and hepatocytes (anti-Hep Par-1) markers. Hepatocellular carcinoma (84.2%) was the most frequently detected hepatic neoplasm, followed by cholangiocarcinoma (15.8%), and these were only identified in adult cows. Hepatocellular carcinomas occurred as solitary masses or multifocal nodules, which on the cut surface were often green. Cholangiocarcinomas occurred as multifocal nodules, occasionally showing an umbilicated appearance. Histologically, hepatocellular carcinomas had mostly trabecular and solid patterns, while cholangiocarcinomas presented mostly a solid arrangement. Upon IHC, all hepatocellular carcinomas were immunolabeled for anti-Hep Par-1, ranging from mild (25%), moderate (31.2%) to marked (43.7%), while immunolabeling for anti-CK7 was detected only in one case of cholangiocarcinoma.

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“…Também, recomenda-se fazer adubação com fertilizantes em quantidades adequadas, preferencialmente com determinação prévia da quantidade necessária, e com dejetos que tenham sido fermentado adequadamente (MEDEIROS et al, 2003). Isso evitará que haja excesso de nitrogênio disponível e, consequentemente, desfavorecer o acúmulo excessivo de nitrato nas plantas.…”

Section: Resultsunclassified

“…), aveia (Avena sativa), azevém (Lolium spp. ), trigo (Triticum vulgare), milho (Zea mays) e capim elefante (Pennisetum purpureum) (MEDEIROS et al, 2003;McKENZIE et al, 2004;RADOSTITIS et al, 2006;JONCK, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Causas de morte em vacas leiteiras no Rio Grande do Sul

Cited by 12 publications

References 28 publications

Clinical and pathological aspects of bovine lymphoma affecting the spinal cord

Clinical and pathological aspects of bovine lymphoma affecting the spinal cord

Primary hepatic neoplasms in cattle

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