Dirson Vieira

Parâmetros hematológicos e bioquímicos da tilápia-do-Nilo (Oreochromis niloticus L.) sob estresse por exposição ao ar

The present study evaluated the hematological and biochemical parameters of adult tilapia (Oreochromis niloticus) under the influence of the physiological stress factor in animals submitted to air exposure during fattening in raceway system. Blood cell count, hemoglobin, hematocrit, mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), leukogram, differencial leukocyte count, platelet, glucose, total protein, cholesterol, triglycerides and electrolytes (calcium, chloride, sodium and potassium) were analyzed. The results showed a uniform distribution for red blood cells, hematocrit, hemoglobin, secondary Wintrobe indices, total protein, glucose, cholesterol, and serum ions, indicated by a relatively low variation coefficient. There was positive correlation only for total white blood cells, organic defense cells (neutrophils and lymphocytes), glucose, cholesterol, sodium and calcium. As for the leukocytes (WBC), as the animals were exposed to aeration, the number of leukocytes gradually decreased (leukopenia), simultaneously occurring neutrophilia and lymphopenia. The glycemic index was a good indicator of physiological stress due to hyperglycemia (82.0±20.88mg/dL) demonstrated in the treatments. The air exposure constituted an imbalance factor at the ion homeostasis and at the endogenous cholesterol synthesis. Besides, the recovery time did not result in the complete physiological rehabilitation face the imposed challenge.

Avaliação clínica e hematológica em bezerros Nelore infectados experimentalmente com isolados de Babesia bigemina das regiões Sudeste, Nordeste e Norte do Brasil

ABSTRACT..- Mendonca C.L., Vieira D., Kohayagawa A., Schenk M.A.M., Madruga C.R. & AfonsoJ.A.B. 2003. [Clinical and hematological evaluation of Nelore calves experimentally infectedwith isolates of Babesia bigemina from the Southeastern, Northeastern and Northernregions of Brazil.regions of Brazil.] Avaliacao clinica e hematologica em bezerros Nelore infectadosexperimentalmente com isolados de Babesia bigemina das regioes Sudeste, Nordeste e Nortedo Brasil. Pesquisa Veterinaria Brasileira 23(1):00-00. Clinica de Bovinos, Campus Garanhuns,Univ. Fed. Rural de Pernambuco, Cx. Postal 152, Garanhuns, PE 55292-901, Brazil.A comparative study was made regarding the clinical and hematological alterations causedby isolates of Babesia bigemina from southeastern, northeastern and northern Brazil inexperimentally infected Nelore calves. Eighteen calves between 7 and 9 months of age, withoutantibodies against Babesia sp and raised free from ticks, were used. Three animals werepreviously inoculated with 2.0x10

Característica leucocitária, relação albumina/globulina, proteína plasmática e fibrinogênio de bovinos da raça Nelore, confinados e terminados a pasto

This research aimed to evaluate the changes in the white blood cell count and some serum proteins of confined cattle (CC) and grass cattle (GC). From the 120 blood samples collected, 60 were obtained from confined Nelore male bovines and 60 from animals with the same characteristics but managed extensively. Samples were obtained at the moment of slaughter. Parameters studied were the white blood cell count, serum albumin/globulin ratio and concentration of plasma fibrinogen. Descriptive statistics was used in the analysis of the data, and the averages, standard deviation and coefficient of variation calculated for all parameters evaluated. The comparisons between averages were made by non-parametric test. The grazing cattle showed higher levels of globulin and fibrinogen when compared to the confined ones (globulin: GC=3.29g dL-1±0.76; CC=2.99g dL-1±0.60 and Fibrinogen: GC=872mg dL