Table 2.

Characteristics of 307 Children With an Initial Entamoeba histolytica Infection

Characteristic	Diarrhea	Colonizationa
Overall	54/307 (17.6)	253/307 (82.4)
Age at infection, d, median (range)	200 (4–701)	214 (3–717)
E. histolytica IgA positive–stool	8/54 (14.8)	57/253 (22.5)
Had second infection
Overall	30/54 (55.6)	132/253 (52.2)
Symptomatic, no.	5	23
Asymptomatic (colonization), no.	25	109

Data are no. of children with the specified characteristic/no. of children in the cohort of interest (%), unless otherwise indicated. Children were considered to be infected with E. histolytica if they had a diarrhea or surveillance stool specimen that tested positive by quantitative polymerase chain reaction and were negative for E. histolytica during the previous 60 days.

Abbreviation: IgA, immunoglobulin A.

^a Defined as an E. histolytica–positive stool specimen collected from an asymptomatic child during monthly surveillance.