Genetics of <i>Entamoeba histolytica</i>: Differences in Drug Sensitivity between Laredo and other Strains of <i>Entamoeba histolytica</i>*

Abstract

SYNOPSIS. The “Laredo strain” of Entamoeba histolytica has been reported to have different temperature requirements for growth than the usually known strains of the species, although morphological and antigenic tests have thus far indicated no significant recognizable differences. Further genetic studies show the Laredo strain to exhibit at least four characteristics different from the usual. Also, a freshly isolated strain (BA) was shown to have the same characteristics as those previously reported for some well‐known strains.