Abstract
Background: Biosurfactants are surface-active compounds produced by some microorganisms. Objectives: In this study, we collected surface skin samples from breast of poultry (chicken, turkey, and, quail) and screened for biosurfactant-producing bacteria. We also determined the genera of cultured strains. Materials and Methods: 33 hemolytic bacterial strains (15, 11, and 7 isolates from chicken, turkey, and quail, respectively) were isolated; oil spreading (OS) and bioemulsifying activities were measured for all isolates. Results: Two isolates of chicken (6.06%), three of turkey (9.1%), and three of quail (9.1%) were positive in all examinations (hemolysis, emulsification index (E24) and oil spreading). In total, eight isolates (24.24%) were positive in all examinations, out of them, seven isolates (87.5%) were gram positives, mainly belonged to Bacillus spp., Staphylococcus spp. and Lactobacillus spp. 31 isolates (93.9%) (out of 33 hemolytic isolates) were positive in oil spreading test while only eight isolates (24.24%) were positive in E24 test. Conclusions: The results showed that biosurfactant-producing bacteria are distributed in breast skin surface of examined birds. Further investigation about the composition of biosurfactants and phylogenetic determination of biosurfactant producing bacteria is suggested.
Highlights
Biosurfactants are surface-active compounds produced by some microorganisms
Materials and Methods: 33 hemolytic bacterial strains (15, 11, and 7 isolates from chicken, turkey, and quail, respectively) were isolated; oil spreading (OS) and bioemulsifying activities were measured for all isolates
The results showed that biosurfactant-producing bacteria are distributed in breast skin surface of examined birds
Summary
Biosurfactants are surface-active compounds produced by some microorganisms. Objectives: In this study, we collected surface skin samples from breast of poultry (chicken, turkey, and, quail) and screened for biosurfactant-producing bacteria. Biosurfactants are a unique class of compounds that have been shown to have a variety of potential applications in remediation of organic- and metal-contaminated sites, in the enhanced transport of bacteria, in enhanced oil recovery, as cosmetic additives, and in biological control [1] They are amphiphilic compounds produced on living surfaces, mostly on microbial cell surfaces, or excreted in extra cellular spaces and contain hydrophobic and hydrophilic moieties that confer the ability to accumulate between fluid phases, reducing surface and interfacial tensions [2]. Surfactin production is necessary for fruiting body formation by Bacillus subtilis [4] Apart from their obvious role as agents that decrease surface and interfacial tensions leading to promote the formation and stabilization of emulsions, surfactants may exhibit several other functions. The effects of uropygial oil on microbial communities of bird’s skin appear to be complex
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