Oral and Poster Abstracts

1015 Prevalence of Eimeria Infections in Dairy Calves from the
state of Minas Gerais, Brazil
EJ. Facury Filho 1 , M. Moura 1 , P. Soares 2 , PM. Ferreira 1 ,
AU. Carvlho 1 , M. Ferreira 1
1 Escola de Veterinária da UFMG, Departamento de Clinica e
Cirurgia Veterinaria, BELO HORIZONTE, Brazil
2 Bayer SA, Division Animal Health, Sao Paulo, Brazil
As Brazilian milk production growth rates rise, the importance of
infectious diseases increase. In this scenario, coccidiosis may play a
relevant role in calf health. The main objective of this study was to
evaluate the prevalence of Eimeria infections in dairy calves up to 1
year of age, in important dairy regions of the State of Minas Gerais,
the largest dairy belt of Brazil. Nine hundred two feces samples were
collected in 20 semi-intensive dairy farms from December 2006 to
January 2007, from newborns to 1-year-old Holstein and Zebu crossbreed
calves. Eimeria oocysts were found in all the farms, present in
66% of the samples. The results show that OOPG is higher in
younger calves up to 60-days-old (2585 oopg), but with lower
prevalence (35%), while as age progresses, prevalence increases
(73.18%) and OOPG decreases (324 oopg). Ten Eimeria species
were identified, and E. zuernii, E. bovis, E. cylindrica, and E.
ellipsoidalis were the most frequently found. E. zuernii showed
higher prevalence in younger animals and E. bovis in animals from 6
to 12-months-old. Eimeria infections can be considered endemic in
the region studied, with younger calves more intensely affected with
pathogenic species, which confirms its importance as a calf disease
in Brazil.
Key words: eimeriosis, coccidiosis, calves diseases, epidemiology
1016 Prevalence and Risk Factors for Abomasal Lesions in Veal
Calves
C. Baehler 1 , G. Schüpbach 3 , M. Stoffel 2 , A. Steiner 1 , A. Von Rotz 2
1
Clinic for Ruminants, Vetsuisse Faculty, University of Bern, Bern,
Switzerland
2
Institute of Veterinary Anatomy, Vetsuisse Faculty, University of
Bern, Bern, Switzerland
3
Swiss Federal Veterinary Office, Bern, Switzerland
Over a period of 6 months, 125 calves were randomly selected at one
large abattoir in Switzerland. 64 calves natura and 61 conventional
were included in the study. The abomasa were classified according to
the presence or absence of lesions in the fundic and pyloric parts. Risk
factors for lesions of the 2 anatomical regions were analysed
separately, because the etiology was reported to be different.
Key words: veal calves, abomasal lesions, prevalence, risk factors
1017 Influence of Supplemented Yeast-selenium on
Thermometabolism in Iranian Holstein Suckling Calves
A. Towhidi 1 , M. Ebrahimi 1 , A. Nik khah 1 , M. Sanjabi 2
1 University of tehran, Department of Animal Science, Karaj, Iran
2 IROST, Department of Animal Science, Tehran, Iran
The Objectives of this study was to determine the effects of
supplemented milk with Selenomethionine (Yeast-selenium) on
thermo-metabolism in Holstein calves.10 Iranian Holstein suckling
calves with 1 month of age were randomly allocated in 2 groups and
fed unsupplemented milk (control)or supplemented milk with 0.3
ppm Se-Met/kg in dry matter intake of milk (treated group) during
winter. The animals were received the treatments and free choice
starter for 2 months. The calves were weighed every week and
blood samples were obtained weekly through the jugular vein, and
plasma were obtained and frozen at -20 °C. Plasma concentrations
of T3, T4 and T3-Uptake were determined using radioimmunoassay
kits. Plasma cholesterol and glucose concentrations were
determined by the Enzymatic, Colorimetric method. Rectal
temperature was recorded at bleeding time. Environmental
humidity and temperature were measured every day over the
experiment. Data were analyzed by using Mixed Model. Treatment
affected (p