članak: 1 od 1  
Acta veterinaria
2002, vol. 52, br. 2-3, str. 85-96
jezik rada: engleski
neklasifikovan
doi:10.2298/AVB0203085S

Koncentracija trijodtironina, tiroksina i kortizola u krvnoj plazmi novorođene teladi
aUniverzitet u Beogradu, Fakultet veterinarske medicine
bInstitut za primenu nuklearne energije - INEP, Beograd
cSzent Istvan University - Faculty of Veterinary Science, Budapest, Hungary

Sažetak

Cilj ovog rada bio je da se odrede koncentracije trijodtironina (T3) tiroksina (T4) i kortizola u krvnoj plazmi teladi tokom prvih 32 sata postnatalnog života kao i 7. danaživota. Ogled jeizveden nadvegrupe teladi prvagrupa teladi jenapajana sa normainom količinom kolostruma, dok je druga grupa dobila duplo manju količinu kolostruma. Dobijeni rezultati ukazuju da se telad rađaju sa visokim vrednostima koncentracije T3, T4 i kortizola u krvnoj plazmi, koje su do četiri puta veće u odnosu na vrednosti ustanovljene 7. dana života. Kod teladi koja su dobijala normalnu količinu kolostruma koncentracija T3 postepeno raste i dostiže plato između 8-28 sata posle partusa, dok nivo T4 u plazmi statistički značajno raste do 18 sata posle partusa. Nagli i statistički visoko značajan porast koncentracije T3 i T4 u krvnoj plazmi tokom prvih 4 sata posle partusa su uočeni kod teladi koja su primila polovinu normalne količine kolostruma, i visoka koncentracija ovih hormona u plazmi se održava sve do 20. sata posle partusa. Nisu ustanovljene statistički značajne razlike u koncentraciji T3 i T4 izmedu prve i druge ogledne grupe, osim 4. i 20. sata posle partusa. U starosti teladi od 7. dana koncentracija tireoidnih hormona u plazmi kod obe grupe teladi se nalazi u okvirima vrednosti nađenih kod odraslih jedinki. Koncentracija kortizola u krvnoj plazmi ppada kod obe ogledne grupe teladi u prvih 18. sati posle partusa, da bi kasnije došlo do blagog porasta koncentracije. U vremenu od 32. sata posle partusa nivo kortizola u plazmi je viši kod druge ogledne grupe u odnosu na prvu. U starosti teladi od 7. dana koncentracija kortizola je četiri puta niža u odnosu na vrednosti ustanovljene neposredno posle partusa. Mišljenja smo da smanjenje unošenja kolostruma za 50% u odnosu na normalnu količinu ima minimalan uticaj na koncentraciju ispitivanih hormona u krvnoj plazmi novorođene teladi.

Ključne reči

calves; colostrum; cortisol; thyroxine; triodothyronine

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