Characterization of Biofilm Forming Marine Pseudoalteromonas spp


  • Samia S. Abouelkheir National Institute of Oceanography and Fisheries (NIOF), Marine Microbiology Lab., Kayet Bay, El-Anfushy, Alexandria, Egypt
  • Eman A. Abdelghany Faculty of Science, Alexandria University, Egypt
  • Hanan A. Ghozlan Faculty of Science, Alexandria University, Egypt
  • Soraya A. Sabry Faculty of Science, Alexandria University, Egypt



Biofilm forming bacteria are omnipresent in the marine environment. Pseudoalteromonas is one of the largest within the γ-proteobacteria class, and a member of marine bacteria. Species of Pseudoalteromonas are generally found in association with marine eukaryotes. In this work, we present the isolation and characterization of two strains forming biofilm on rock surface and associated with marine sponge. They were identified using 16SrDNA as Pseudoalteromonas prydzensis alex, and Pseudoalteromonas sp. alex. They showed the highest titer in biofilm formation quantified using the test tube method using crystal violet.


Biofilm, Pseudoalteromonas prydzensis alex, Pseudoalteromonas sp. Alex, Molecular identification, Marine rock, Marine sponge


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