[Effect of sports on the HDL cholesterol level in the Senegalese].
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Adult↗
Biomedical subjects
B Faye
Publications and source records attributed to B Faye.
Trace-elements status in camels. A review.
Data relating to trace-elements status in camels is scarce, from both a clinical and biochemical point of view. Clinical deficiency or toxicity has rarely been described in this species. However, there is a some evidence that camels are sensitive to trace element disorders in the same way as other ruminants. For example, copper deficiency in camels has been reported in East Africa. Normal plasma level is comparable to cattle (70-120 mg/100 mL). Camels appear to maintain zinc levels at a lower value than other domestic ruminants (< 60 micrograms/100 mL). Iron metabolism is more active in the liver than in the spleen. Data concerning manganese levels are possibly unreliable. Some cases of selenium deficiency (white muscle disease) have been reported. No data are available for cobalt status in camels. Finally, camels appear to be more sensitive to iodine deficiency than the other domestic ruminants.
Animals↗
Relationship between individual-cow udder health status in early lactation and dairy cow characteristics in Brittany, France.
Data from a 4-year ecopathological survey involving 47 dairy farms in Brittany (France) were used to determine the individual animal characteristics associated with the udder health profiles of clinical and subclinical mastitis, and the presence of minor or major pathogens in milk during early lactation. Herd effect was taken into account and a within-herd analysis using factorial correspondence analysis and a decomposition of chi-square distance was performed. In primiparous cows, the main association observed was between milk production and intramammary infections with major pathogens. The dirtiness score showed contradictory relationships with udder health profiles. The indoor/outdoor transition period was unfavourable for udder health status; since the frequency rate of subclinical and clinical mastitis increased during this period. In multiparous cows, intramammary infections by minor or major pathogens were closely associated with non-infectious udder diseases, but the main effect was due to parity. Old cows were generally affected by higher somatic cell counts than younger cows regardless of whether the SCC were associated with clinical mastitis or not.
Animal Feed↗
Comparative relationship between copper-zinc plasma concentrations and superoxide dismutase activity in camels and cows.
On an experimental farm, five camels and five cows were fed with a similar basal diet over a 6-month period. They received an oral trace element supplement for 3 months (days 22-112). This supplement contained zinc and copper sulphate, and corresponded to twice the daily requirement generally recommended for cows. Plasma zinc and copper concentrations were significantly lower in camels (44 micrograms/100 mL for copper and 38 micrograms/100 mL for zinc) than in cows (106 and 83 micrograms/100 mL, respectively). The supplementation had no effect on the plasma zinc concentration in the camels in spite of the low observed values. The mean erythrocyte SOD activity was also significantly higher in the cows (2,404 +/- 211 IU/100 gHb) than in the camels (1,720 +/- 312 IU/100 gHb). In both species, no correlation was found between copper plasma concentration and erythrocyte SOD activity. In cows, a positive relationship was observed between plasma zinc concentration and SOD activity (r = 0.396). In contrast, a negative relationship was found in camels (r = -0.369). These results are discussed in relation to the physiological peculiarities of the camel.
Animal Feed↗