PENAPISAN BAKTERI PROBIOTIK DAN PERANANNYA TERHADAP INFEKSI BUATAN Vibrio harveyi PADA UDANG VANAME (Litopenaeus vannamei) Screening of probiotic bacteria and its role on artificial infection of Vibrio harvey in white shrimp (Litopenaeus vannamei)

Probiotic was screened from 28 strains of normal bacterial flora isolated from rearing water in a Litopenaeus vannamei farm based on its inhibitory activity against the growth of Vibrio harveyi. Antibacterial activity was also tested in vivo to V. harveyi in L. vannamei. The result showed that the probiotic has a antibacterial effect on V. harveyi. The in vivo test showed that shrimps injected with probiotic previously before challenged with V. harveyi has survival higher than control. Probiotic isolate was suspected as Vibrio furnissi.