TANNIFER TREES IN THE CONTROL OF GASTROINTESTINAL NEMATODES OF SMALL RUMINANTS IN TROPICAL ÁREAS | Tanniferous trees used for gastrointestinal nematode control in small ruminants in tropical zones

English. In this review, we gathered information on the effect of the inclusion of tanniferous trees in the diet of small ruminants for the reduction of gastrointestinal parasites and weight gain in tropical areas. Tropical forage trees are characterized by high tannin content, protein and their nutritional potential with anthelmintic effect. Condensed tannins have a positive effect on the decrease of gastrointestinal nematodes and an increase in animal production, mainly on weight gain.

Spanish; Castilian. The objective of this review is to present an overview of the potential of tanniferous trees for the control ofgastrointestinal nematodes in sheep in the tropics. A systematic review of scientific articles in various databaseswas carried out on the potential of tropical tanniferous trees, their effect on the control of gastrointestinalparasites and the improvement of weight gain, a range of 16 years (2006-2022) was considered in thepublications consulting a total of 150, of which 46 were related to the topic for the selection of information, atotal of 31 scientific articles were obtained, which were considered. Table 1 shows that foliage extracts of speciesconsidered tanniferous such as L. leucocephala cause inhibition of the hatching of eggs and on the infective larvaL3 of H. contortus. The bibliographic evidence consulted allows us to elucidate that the use of tropical trees withforage potential and high contents of condensed tannins in their tissues can be successfully used for the controlof gastrointestinal nematodes in vitro and in vivo. The largest percentage of those consulted used tannin-bearingplant extracts that have been shown to have anthelmintic properties and high nutrient content, making thema viable and economical alternative for feeding small ruminants in production systems in tropical areas due totheir consumption preference and their high nutrient content.