Figure 8From: Multifunctional polymeric nanoparticles doubly loaded with SPION and ceftiofur retain their physical and biological properties Determination of the antibacterial activity of PHBV/SPION/CEF against Escherichia coli (ATCC 25922) at 24 hours of incubation using LIVE/DEAD viability assays. A) control (without treatment), B-E) treatment with 0.1, 1, 10 and 20 μg/ml of PHBV/SPION/CEF nanoparticles, F) treatment with free ceftiofur 30 μg.Back to article page