| prevalence and distribution of gastrointestinal helminths and their effects on weight gain in free-range chickens in central zambia. | examination of helminths from gastrointestinal tracts of 125 free-range chickens in zambia revealed a 95.2% prevalence rate. the species and their prevalences were: allodapa suctoria (85.6%), tetrameres americana (80.8%), ascaridia galli (28.8%), gonglonema ingluvicola (50.4%), raillietina spp. (81.6%) and heterakis gallinarum (32.8%). no trematodes or syngamus trachea were found. mixed infections accounted for 88.2% as compared to 7.2% of single infections. effects of helminthoses on weight gai ... | 2007 | 17847826 |