Table 1.

Physicochemical characteristics of Ser E rMOMP-SPA08 formulations

Adjuvant	P:Al molar ratio	Zeta potential (mV)	Size (d50) (µm)	% Adsorption
				E6020	Ser E
SPA08-1	0	20.0 ± 1.1	4.6 ± 0.0	100.0 ± 0.0	100.0 ± 0.0
SPA08-3	1	−19.7 ± 3.4	4.0 ± 0.3	100.0 ± 0.0	68.9 ± 16.6
SPA08-4	2	−29.9 ± 6.4	4.8 ± 0.0	100.0 ± 0.0	44.2 ± 13.3
APF	NA	−33.0 ± 2.4	2.6 ± 0.1	100.0 ± 0.0	41.9 ± 0.2