Banca de QUALIFICAÇÃO: JULIANA FERREIRA ROCHA MELLO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : JULIANA FERREIRA ROCHA MELLO
DATA : 22/11/2018
HORA: 10:00
LOCAL: Auditório do Anexo I do Instituto de Veterinária
TÍTULO:

Enzootic hematuria and tumors of the upper alimentary tract in Brazilian buffaloes

PALAVRAS-CHAVES:

Pteridium arachnoideum, bracken fern, bubaline

PÁGINAS: 21
GRANDE ÁREA: Ciências Agrárias
ÁREA: Medicina Veterinária
SUBÁREA: Patologia Animal
ESPECIALIDADE: Anatomia Patologia Animal
RESUMO:

Species of the genus Pteridium are among the most important poisonous plants in the world. Their urbane distribution and highly carcinogenic effect, both in animals and human beings, contribute for the familiarity of those weeds worldwide. In the Southeast of Brazil, Pteridium arachnoideum, a weed popularly known as “bracken” or “field bracken” is a serious problem for the local farmers, constantly accounting for innumerous livestock death and inestimable economic loss. The carcinogenic effect of Pteridium arachnoideum is due to a norsesquiterpene-type ptaquiloside, a radiomimetic substance known for a number of distinct and well-recognized syndromes in livestock. Their occurrence will depend on several factors such as the amount of bracken available, the consumption rate and length of time. They main syndromes induced by bracken, commonly described in cattle, are as follows: Tumors of the Upper Alimentary Tract (TUAT), Bovine Enzootic Hematuria (BEH), and Acute Haemorrhagic Disease (AHD). Heretofore, no reports have been made on TUAT and AHD in buffaloes, while only a few cases of Enzootic Hematuria have been described in this species. In the southeast region of Brazil, it is well known that BEH is responsible for a great economic loss, not only regarding livestock death, but also due to a decrease in cattle productivity. Therefore, for the past 12 years, farmers located in the municipality of São José do Barreiro (a neighboring area of São Paulo State) have been replacing their cattle herd for buffaloes herds in areas severe infested by bracken; theoretically buffaloes would be more resistant to the toxic effects of Pteridium than cattle. Nevertheless, farmers have been reporting cases of EH in buffaloes from those areas. Ergo, we aim to evaluate epidemiological, clinical, and pathological aspects of EH on buffaloes in the São Paulo State and neighboring areas of Rio de Janeiro State. Moreover, we intend to propose prophylactic measures to minimize the consequent economic loss due to bracken poisoning.  All data, clinical reports, and samples for laboratorial analysis will be made at buffaloes farms in the municipality of São José do Barreiro (São Paulo State, Brazil) and neighboring countries of Rio de Janeiro State (Brazil). Moreover, samples of bladders, ureters, and kidneys of slaughtered buffaloes will be collect at the local slaughterhouse. An epidemiological questionnaire investigation regarding P. arachnoideum poisoning in buffaloes will be carried. A thorough physical exam and the pertinent laboratorial tests will be conducted on buffaloes presetting signs of Hematuria. Necropsies will be performed in buffaloes that may die during the project, and samples of several tissues will undergo histopathological evaluation.

MEMBROS DA BANCA:
Interno - 2606155 - VIVIAN DE ASSUNCAO NOGUEIRA CARVALHO
Interno - 2929022 - SAULO ANDRADE CALDAS
Externo à Instituição - MICHEL JOSÉ SALES ABDALLA HELAYEL - UFF
Externo à Instituição - LUIS ARMANDO CALVÃO BRUST - CESVA
Externo à Instituição - FLÁVIO AUGUSTO SOARES GRAÇA - UENF