The nematode parasites decline productivity of beef cattle. The nematode egg count is decreased in feces of cattle grazing plants with high hydrolysable tannin content. There is little information of effect of added tannins to the diet on nematodes presence in beef cattle. In this experiment 40 receiving bull-calves were involved to determine the influence of hydrolysable tannin extract on nematode egg count in feces of receiving beef cattle. Bull-calves were placed in 8 dirt-floor pens, and during 3 continuous days, fecal samples were taken from each. They were randomly assigned to treatments: (1) 70% roughage (16.1% CP; 1.27 Mcal NE_m/kg DM) corn silage-based diet (Control); (2) Control plus 1.5% of hydrolysable tannin extract DM basis (HT). After 28 d on treatment diets, fecal samples were taken during 3 continuous days again, and nematode eggs per gram of feces (EGF) were counted. Before statistical analyses, data were normalized by transforming to log₁₀ x + 17 EGF. Results were analyzed by ANOVA for a completely randomized design. Additionally, both in Control and HT, EGF before and after treatments were compared using paired t-test. Haemonchus spp. and Cooperia spp. were most frequently genus found (82.5 and 75%, respectively). At start of experiment Haemonchus spp. EGF was similar (223 ± 77 EGF) between treatments (P > 0.87). After 28 d of receiving treatments, HT decreased 67.9% (P = 0.02) Haemonchus spp. EGF comparatively with Control (62 vs. 196 EGF). The paired t-test results indicated that Haemonchus spp. EGF were similar (P = 0.47) before and after in Control, but in HT were 70% lower (P < 0.01) after treatments (210 vs. 62 EGF). At arriving Cooperia spp. EGF was similar between treatments (P = 0.94), but after 28 d, EGF count was reduced 67.8% (P = 0.04) by HT relative to Control (39 vs. 122 EGF). The paired t-test indicated that in Control, EGF count was similar before and after 28 d (P = 0.29), but in HT EGF decreased (P < 0.01) 53% (64 vs. 136 EGF). Results suggest that HT addition in to the diet contributes to decrease fecal shedding of nematode eggs in receiving feedlot cattle.