Yongquan Ma

INTRODUCTIONAdvancements in clinical veterinary medicine have resulted in portable diagnostic tools that provide rapid, cost-effective means to investigate metabolic disturbances using blood samples. The handheld i-STATR 1 (2006) analyzer (Abbott Laboratories, East Windsor, NJ) requires a relatively small blood sample (∼100 μL), can be performed “pen-side,” and may be useful in ...

1. GeneralitiesGastrointestinal infections with pathogenic bacteria y the subsequent clinical expression of disease occur frequently in young animals under current intensive production systems. Infections are responsible growth rates and consequently cause economic losses in animal production. Antibiotics modify the microflora of the gastrointestinal tract (GIT) and are the main available tool to ...

Introduction Lysine is the second limiting amino acid in poultry rations. In the ideal protein concept, lysine is the reference amino acid (Pack, 1995; Silva et al., 2005). Research methods to determine amino acid requirements or their ideal profile include the dose-response method and the factorial method (Sakomura and Rostagno, 2007). The dose-response method determines the requirements based o ...

INTRODUCTION An important function of animal production is to provide high-quality protein for human consumption. In order to fulfill this role, animals themselves require high-quality protein in correct proportions in their diets. There are many ways to assess the quality of proteins, but nevertheless, they are all related to amino acid supply, which thus becomes a key feature in animal nutrition ...

Introduction. Over the 20 last years, the increase in sow’s prolificacy has been associated with a decrease in average birth weight and an increase in within-litter variation of individual birth weight (Quiniou et al., 2002). At the same time, milk potential increased but not appetite, which resulted in more important mobilization of body reserve during lactation. Hence the benefit of a ...