1 23 Aquaculture International Journal of the European Aquaculture Society ISSN 0967-6120 Volume 25 Number 2 Aquacult Int (2017) 25:927-939 DOI 10.1007/s10499-016-0085-y Probiotic effect of Streptomyces strains alone or in combination with Bacillus and Lactobacillus in juveniles of the white shrimp Litopenaeus vannamei Milagro García Bernal, Ricardo Medina Marrero, Ángel Isidro Campa-Córdova & José Manuel Mazón-Suástegui