Effect of intramuscular selenium injection on selenium concentrations in colostrum and milk of dairy cows
2002
Pichet Koompa(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Veterinary Medicine) | Jessada Ruttanophart(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Veterinary Medicine) | Thanu Limpapattanavanich(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Veterinary Medicine) | Pisoot Junchaiyot(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Veterinary Medicine) | Theera Rukkwamsuk(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Veterinary Medicine. Department of Medicine)
Present study reported the effect of selenium injection on the concentration of selenium in colostrum and milk of dairy cows. Twenty crossbred Holstein Friesian dry cows were randomly divided into two groups: 10 cows were intramuscularly injected with 20 ml of 5 percent sodium selenite (Selevit) (treated group) and 10 cows were intramuscularly injected with 20 ml of sterile water at 3 and 1 weeks before calving. First colostrum and milk were collected from all cows for all cows for determination of selenium concentration by using spectrofluorometry. Results revealed that selenium concentrations in colostrum did not differ between the two groups. Selenium concentrations in milk were higher in the treated group than in the control group. Compared with selenium concentrations in colostrum, selenium concentrations in milk were lower in both groups. These results indicated that prepartum injection of selenium did not affect selenium concentrations in colostrum, and cows with selenium injection increase selenium secretion through their milk. These may help the cows to have a good defense mechanism of the udder during lactation.
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