Portela, RaquelAlmeida, Pedro L.Patricio, PedroM.T., CidadeSobral, RitaR. Leal, Catarina2020-11-172020-11-172013-09PORTELA, Raquel; [et al] – Staphylococcus aureus strains rheology during growth. In 4th Iberian Meeting on Rheology. Fundamental and Applied Rheology (IBEREO 2013). Málaga, Spain. Pp. 1-3http://hdl.handle.net/10400.21/12380The study of the mechanical properties of living bacteria in a liquid rich medium, environment commonly used in laboratorial settings, opens a new perspective on the bacterial physiology and behaviour during population growth. In this work, the human pathogen Staphylococcus aureus was used as a study model due to its coccoid shape and regular morphology: MRSA strain COL [1] and its mutant strain RUSAL9 [2], which presents a deficient daughter-cell separation mechanism. Cultures were grown under a mechanical stress solicitation in parallel with optical density monitorization. Complex viscoelastic behaviour was revealed by these bacterial systems [3]. In particular the shear viscosity measurement during growth time, for a constant shear rate, showed an unexpected behaviour that cannot be observed by common optical experimental techniques.engStaphylococcus aureusRheologyGrowthconference object