Efeito do neem (Azadirachta AbstractThe aim of this study was to evaluated the effect of Azadirachta indica (Neem) extracts upon the productive response and control of gastrointestinal nematodes in Santa Inês sheep during the dry season grazing. Twenty four sheep, were divided in three groups according to the following treatments: SPControl (Animals receiving protein supplement); SP-Oil (Animals receiving protein supplement and Neem oil extract) and SP -Leaf (Animals receiving protein supplement and Neem dry leaves). The animals received daily protein supplement, while the oil and the dry leaves treatments were offered at interval of 15 days, a total of 4 doses ministred. Each day of supply of oil and leaves, feces samples were