The objectives of this research were to determine the work posture risk level and suggest recommendation of improvement on small factory of corn chips. NBM questionnaire was used to find out workers' complaints encountered from the work they have done. OWAS method was conducted with WinOWAS software, involving six workers and 31 work postures. NBM indicates that workers do enduring the feeling of sore on their neck, back, hand, and feet during and after work. 42%, 6%, 26%, and 26% of activities were at category 1, category 2, category 3, and category 4 respectively.

Abstract.Lactobacillus plantarum bacteria is one kind of environmental friendly lactat acid. It's not phatogenic and could slowed down the growth of phatogen bacteria. It also has a function as probiotic. This research purpose is to find the best dose and influence of L. plantarum bacteria in Patin Jambal fish's hispathology and hemathology that infected with Edwardsiella tarda bacteria. The cause of L. Plantarum submersion is to increase the immune system in Patin jambal (P. djambal) with 10 3 , 10 8 and 10 13 cfu.ml -1 dose in one week. The next step is given infection with E. tarda.submersion. During the infection blood is taken from all subjects to count erythrocytes, leucocytes, hematocrit and hemoglobin during this hour: 0,12,24,36. After three days of infection, sample are taken from liver, kidney and gill to observe the tissue and damage score. The next step is doing statistic analyze using F (ANOVA) test based on completely randomized design. Result analysis show different result ( F count>F table). It can be concluded that L. plantarum bacteria give the best result for histopatology and hematology in Patin Djambal fish (infected with E. tarda bacteria with best dose in B 10 8 cfu.ml -1.)