At the biennial conference of the Far Eastern Association for Tropical Medicine, held recently at Saigon, Walker and Sellards1 reported some interesting results of the experimental feeding of different species of amebas to human beings. Their work was unique not only in the number of comparative tests made of different species, but also in the thorough determination of the species of organism fed.
In all, sixty tests were made, embracing twenty feedings of artificially cultivated amebas representing thirteen strains and eight species, twenty of Entamoeba coli and twenty of Entamoeba histolytica. In the first series — the feeding of cultivable species of amebas — it was usually possible to recover the organisms on suitable mediums during the first few days, but not subsequently, nor did later microscopic examination establish their presence. In none of these cases was there a resultant dysentery. Of the subjects fed with Entamoeba coli, seventeen