however , the success of infection , determined one and five day ( s ) after the end of the incubation , is independent from the length of the incubation period and , consequently , does not depend on the number of ingested algae , either : in all experiments about 50 % of the paramecium population becomes infected and one to three algae are primarily enclosed in individual perialgal vacuoles within a ciliate cell .
C0042219
vacuoles
C0007634
cell