Padillo, Gerald A.2026-07-092026-07-092021-05Padillo, G. A. (2021). Effect of lactic acid bacteri serum on the strain performance of Broilers. [Unpublished thesis, Don Mariano Marcos Memorial State University-North La Union Campus, Sapilang, Bacnotan, La Union]. Lakasa ti Sirib, DMMMSU Institutional Repository.https://lakasa.dmmmsu.edu.ph/handle/123456789/2096Antibiotic resistance greatly affect the human food consumption of poultry products these days. Ban of antibiotic result in finding alternatives to meet the required nutrients of the poultry. Hence, this study on Effect of Lactic Acid Bacteria Serum on Growth Performance of Chicken Broilers was conducted from March 5 to April 4, 2021, at Namaltugan, Sudipen, La Union. Treatments given are T0 – control (commercial probiotics), T1 – 5% LABS, T2 – 10% LABS, T3 – 15% LABS. Based on the results of the study, supplementing Lactic Acid Bacteria Serum on the drinking water of broilers showed insignificant results on the final weight, gain in weight, feed conversion ratio and profit above feed, medicine and stock cost. Significant result was observed on the mean cost of probiotics to produce a kilogram gain in weight.en-USThesis