title: Effects of various infestation levels of cattle lice (Mallophaga: Trichodectidae and Anoplura: Haematopinidae) on feed efficiency and weight gains of beef heifers.
mesh_terms: D000821:Animal Feed; D000818:Animals; D000854:Anoplura; D001835:Body Weight; D002417:Cattle; D002418:Cattle Diseases / Q000503:physiopathology*; D005260:Female; D010373:Lice Infestations / Q000503:physiopathology / Q000662:veterinary*; D008003:Phthiraptera