_1685865131 20230604075211000 Rovedar Daryoushbabazadeh@gmail.com Rovedar Journal of World’s Poultry Science J. World's Poult. Sci. 2980-7999 09 25 2022 1 1 Sufian Abdo Jilo https://orcid.org/0000-0002-0498-3054 Sadik Zakir Abadura Sureshkumar P. Nair Introduction: Gastrointestinal tract helminthiasis of poultry is a parasitic infection of gastrointestinal parts of poultry by macroparasite which is classified as a tapeworm (cestodes), roundworm (nematodes), and flukeworm (trematodes). Cestodes and nematodes are the common intestinal helminthic infections in local chickens leading to high nutritional and economic loss to the poor farmers of rural areas. Thus, the current study aimed to determine the prevalence of gastrointestinal helminth parasites and identify the parasite species that infect local breed chickens in the study area. Materials and methods: This cross-sectional study on gastrointestinal helminths was conducted on 144 local breeds of chickens raised under a traditional management system in seven kebeles located around Dalomana town of Bale zone, Ethiopia. Results: Of these chickens, 131 (91%) were infected with one of the five different helminth parasites and 13 (9%) were free of helminth parasites. The results of the current study indicated that 131 (91%) and 107 (74.3%) of the examined chickens were invariably infected by diverse species of cestodes and nematodes species, respectively. The major cestode species recovered from chickens were Raillietina echinobothrida (75.5%), Raillietina tetragona (73.6%), Davainea proglottina (11.1%). The major nematode species encountered were Heterakis gallinarum (37.5%), Ascaridia galli (35.4%), Capillaria anatis (6.9%), Capillaria obsignata (5.6%), and Capillaria annulata (4.9%). Regarding the prevalence of these parasites in relation to age, sex, and kebele, no significant difference was indicated. Conclusion: The findings of the current study strongly suggested that helminthiasis is a very serious problem of backyard chickens in Dalomana district, Bale zone of Oromia, and appropriate control strategies need to be devised. 12 25 2022 16 21 https://creativecommons.org/licenses/by/4.0 10.58803/jwps.v1i1.3 https://jwps.rovedar.com/index.php/JWPS/article/view/3 https://jwps.rovedar.com/index.php/JWPS/article/download/3/4 https://jwps.rovedar.com/index.php/JWPS/article/download/3/4