El Grupo de Investigacion en Especies Silvestres, Sanidad y Bienestar Animal, de la Escuela de Ciencias Animales de la Universidad de los Llanos realizara el I ENCUENTRO DE MEDICINA Y CONSERVACION DE ESPECIES SILVESTRES, que se llevara a cabo del 10-12 de Mayo de 2017, en la ciudad de Villavicencio-Meta, Colombia por tal motivo estamos invitando a participar del evento, con ponencias orales y carteles, de proyectos de investigacion, casos clinicos, serie de casos.La Revista Orinoquia de la Universidad de los Llanos publicara una separata especial, por lo tanto esta abierta la convocatoria para publicar articulos completos, comunicaciones cortas. Igualmente se incluiran los resumenes del evento.Para mayor informacion anexamos el link del evento http://fcarn.unillanos.edu.co/especies/Requisitos para los autores en la Revista Orinoquia: http://orinoquia.unillanos.edu.co/index.php/orinoquia Abstract:Gastrointestinal nematodes (GINs) is one of the main sanitary problems of ruminant herds, causing large economic losses to breeders. Chemical control continues to be the main measure used to combat GINs, but as resistant parasite populations spread, the efficiency of this method is becoming impaired. In light of this situation, alternative ways to control verminosis are gaining importance. Among these, phytotherapy has attracted particular attention. This review presents the current status of research on phytotherapeutic agents, their difficulties and perspectives. Plants with nematicidal activity are a potential source of chemical substances, including new molecules, that can be used to control GINs in ruminants. The principal difficulty of research into phytotherapic substances is to identify the bioactive compounds, because in many cases in vitro tests have shown promising results, but in vivo test results have been disappointing. Among the causes is host-drug interaction. Therefore, more careful choice of plants with anthelmintic potential by adoption of a standardized system to analyze the results of in vitro testing, combined with better understanding of the synergistic relations among metabolites and the adjustment of methods for in vivo testing, can make phytotherapy for control of GINs more effective.HIGHLIGHTSPlants with anthelmintic activity may have potential sources of chemical substances that can be used to controlgastrointestinal nematodes in ruminants.The main difficulty of the research with herbal medicines is the lack of in vitro and in vivo correlation with phytotherapicsubstances activities.Better understanding the interactions between metabolites and the use of appropriate methodologies to evaluatephytotherapics, may contribute to in vivo results.http://www.nematoda.org/doi/10.4322/nematoda.00916 Prefacio Introducao: Terapia Anti-HelminticaWelber Daniel Zanetti LopesGuilhermePinheiro dos SantosFernando deAlmeida BorgesAlvimar Jose daCostaValcinir Aloisio Scalla VulcaniCoroline Rocha de Oliveira Lima Nematodeos de Ruminantes DomesticosWelber Daniel Zanetti LopesAlvimar Jose da CostaFernando de Almeida BorgesValcinir Aloisio Scalla VulcaniRogerio Elias RabeloMurilo Abud Bichuette Dinamica Populacional de Larvas (L3) deNematodeos gastrintestinais de Ruminantesnas PastagensWelber Daniel Zanetti LopesAlvimar Jose da CostaAlexandre Braga ScarpaFernando de Almeida BorgesGuilherme Pinheiro dos SantosWillian Giquelin MacielHenrique Trevizoli Ferraz ResistenciaParasitaria e o Uso Prudente de Anti-Helminticos em RuminantesWelber Daniel Zanetti LopesFernando de Almeida BorgesAlvimar Jose da CostaAlexandre Braga ScarpaRogerio Elias RabeloWeslen Fabricio Teixeira ComplexoTeniase / CisticercoseWelber Daniel Zanetti LopesAlvimar Jose da CostaAntonio Augusto Mendes MaiaGabriel Augusto Marques RossiKatia Denise Saraiva BrescianiGustavo Felippelli Fasciolose no BrasilWelber Daniel Zanetti LopesAlvimar Jose da CostaLuiz Antonio Franco da SilvaFlavia Carolina FaveroLucas Vinicius Costa GomesAlexandre Braga ScarpaHenrique Trevizoli Ferraz Eimerioseem OvinosRafael Silveira CarvalhoWelber Daniel