RESUMEN
DIVA vaccines also known as Differentiating Infected from Vaccinated Animals help in the differentiation between infected and vaccinated animals. The first DIVA vaccines were known as marker vaccines. The term DIVA vaccine was coined in 1999 and the accompanying diagnostic tests were developed by J.T. van Oirschot and colleagues at the Central Veterinary Institute in Lelystad, The Netherlands [1], [2].
RESUMEN
The present article stresses on the effect of natural growth promoters dietary organic acid (OA) supplements and mannan oligosaccharide (MOS) and xylanase as animal feed supplement on live body weight gain, dressing percentage, weight of vital organs and muscles and mean villus lengths in digestive tract of livestock along with their application as growth promoters in commercial animal feed.