1. Laboratoire Microorganismes et Biomolécules Actives, Université de Tunis El Manar, Faculté des Sciences de Tunis, 2092 Tunis, Tunisia
2. School of Natural and Environmental Sciences, Newcastle University, Ridley Building 2, Newcastle upon Tyne, NE1 7RU, UK
3. Central Facility for Microscopy, HZI – Helmholtz Centre for Infection Research Inhoffenstraße 7, 38124 Braunschweig, Germany
4. Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
5. Institut National des Sciences Appliquées et de Technologie, Université Carthage, Centre Urbain Nord BP 676-1080 Tunis Cedex, Tunisia