Perspectives in the use of tannins in animal production & health: a review

Abstract

Tannins are a group of polyphenolic compounds that are widely present in plant region and possess various biological activities including antimicrobial, anti-parasitic, anti-viral, antioxidant, anti-inflammatory, immunomodulation, etc. Tannins have traditionally been regarded as “anti-nutritional factor” for monogastric animals and poultry, but recent researches have revealed some of them, when applied in appropriate manner, improved intestinal microbial ecosystem, enhanced gut health and hence increased productive performance. Therefore, tannins are the major research subject in developing natural alternative to in-feed antibiotics. Strong protein affinity is the well-recognized property of plant tannins, which has successfully been applied to ruminant nutrition to decrease protein degradation in the rumen, and thereby improve protein utilization and animal production efficiency. Incorporations of tannin-containing forage in ruminant diets to control animal pasture bloat, intestinal parasite and pathogenic bacteria load are another 3 important applications of tannins in ruminant animals. In conclusion, use of tannins in appropriate manner may help to improve animal performance and health. immunodeficiency (HIV), HT anti-enterovirus 71 in vitro efficiently mortality clinical through the inhibition of viral replication in mice model. Phlorotannins isolated from E. cava have been demonstrated to possess strong activity against influenza virus neuraminidase, porcine epidemic diarrhea virus (PEDV) by inhibiting viral entry and viral replication and HIV-1.Many studies have been conducted on tannins effects against the replication of human immunodeficiency virus (HIV), and the results of the various teams indicate that tannins have several targets of action in the HIV replicative cycle. Ellagitannins isolated from Tuberarialignosa inhibited HIV’s entry into MT-2 cells Other have on ellagitannins (geraniin corilagin) that reduced HIV replication by inhibiting the HIV-1 protease and HIV-1 integrase enzymes