Table 1.

Formulation of suspension for each group of mice.

Group	Suspension received
WC+Nal	250 μl of PBS containing inactivated Vibrio cholerae (108 CFU) and naloxone (0.15 mg)
WC+Se NPs	250 μl of PBS containing inactivated Vibrio cholerae (108 CFU) and selenium NPs (100 μg)
WC+diet of Se NPs	250 μl of PBS of inactivated Vibrio cholerae (108 CFU), daily diet of Se NPs (100 μg)
WC+Nal+Se NPs	250 μl of PBS containing inactivated Vibrio cholerae (108 CFU) and naloxone (0.15 mg) and selenium NPs (100 μg)
WC+Nal+diet of Se NPs	250 μl of PBS containing inactivated Vibrio cholerae (108 CFU) and naloxone (0.15 mg), daily diet of Se NPs (100 μg)
Dukoral vaccine	200 μl of PBS containing Dukoral vaccine (108 CFU)
Control	250 μl of inactivated Vibrio cholerae (108 CFU)
Control	250 μl of PBS