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Natural resources emerge as an essential and alternative tool for controlling parasitic agents. The present study was carried out to evaluate in vitro and in vivo effect of Persea americana fruit extract (PAFE) on helminthiasis and coccidiosis. In vitro, anthelmintic activity was performed using PAFE against Allolobophora caliginose. PAFE elicited significant anthelmintic activity comparable to mebendazole with the lesser time taken to paralysis and death for 200 mg/mL. In vitro anticoccidial activity of PAFE, amprolium, phenol, DettolTM, and formalin were studied after incubation with unsporulated oocysts. PAFE was able to significantly inhibit oocyst sporulation in a dose-dependent manner. A total 35 male mice were divided into seven groups. At day 0, all groups except first and second groups were infected with 1×103 E. papillata. Group 1 served as control. Group 2 served as uninfected-treated one. Group 3 was considered an infected-untreated group. After 60 min of infection, groups 4, 5, and 6 were treated with PAFE. Group 7 was treated with amprolium. However, not at par with amprolium, PAFE showed a good anticoccidial activity adjudged based on a significant change in body weight gain, feed intake, oocysts output, and content of carbohydrates and protein. Therefore, PAFE exhibits powerful anthelmintic and anticoccidial effects.