Vanessa Esteves

Hematological, biochemical and ruminant parameters for diagnosis of left displacement of the abomasum in dairy cows from Southern Brazil

O objetivo deste trabalho foi avaliar indicadores hematologicos, bioquimicos e ruminais no diagnostico e tratamento do deslocamento de abomaso a esquerda (DAE) em vacas leiteiras, na Regiao do Planalto do Rio Grande do Sul, Brasil. Foram coletadas amostras de liquido ruminal, sangue e urina de 40 animais, dos quais 20 vacas com DAE e 20 vacas clinicamente sadias utilizadas como grupo controle. Os animais com DAE, quando comparados ao grupo controle, apresentaram diminuicao da producao de leite diaria, do peso corporal e do escore condicao corporal. A utilizacao de fitas reagentes para medicao do pH ruminal demonstrou-se eficaz em campo, em comparacao ao potenciometro digital. A dinâmica ruminal apresentou-se prejudicada nos animais com DAE, o que foi evidenciado pelos valores aumentados do tempo de reducao de azul de metileno. Os valores sericos de lactato, beta-hidroxibutirato, ureia, albumina, acidos graxos livres e colesterol apresentam-se como ferramentas auxiliares na caracterizacao da doenca.

Frequencies of DEA blood types in a purebred canine blood donor population in Porto Alegre, RS, Brazil

The study of canine immunohematology is very important for veterinary transfusion medicine. The objective of this study was to determine the DEA blood type frequencies in a purebred canine blood donor population from Porto Alegre, RS, Brazil. One hundred clinically healthy purebred dogs were chosen, 20 dogs from each breed (Great Dane, Rottweiler, Golden Retriever, German Shepherd and Argentine Dogo). Blood samples were taken in ACD-A tubes and the MSU hemagglutination tube test (MI, USA) was used to determine the blood types. The studied population presented general frequencies of 61% for DEA 1.1, 22% for DEA 1.2, 7% for DEA 3, 100% for DEA 4, 9% for DEA 5 and 16% for DEA 7. A significant association was found between breeds and certain combinations of blood types in this population. The results are in agreement with the literature since most part of the canine population studied was positive for DEA 1.1, the most antigenic blood type in dogs. Differences were found among the studied breeds and those should be considered when selecting a blood donor. The knowledge of blood types frequencies and their combinations in different canine populations, including different breeds, is important because it shows the particularities of each group, helps to keep a data bank of local frequencies and minimizes the risks of transfusion reactions.