... cycle: the trophozoite or motile stage, the precystic stage, the cystic stage, and the metacystic stage (Anderson, 39). The trophic ameba is especially adapted for life in the tissues of its host. The ameba passes out of the body of the human host in the feces into the external environment in its precystic form (39). The cystic form of the Endamoeba histolytica is the resistant form of the pathogen, and it exists free in nature (40). The metacystic stage is basically the reproductive stage, where each nuclei divides into two daughter nuclei. These small amebas develop into the trophozoite form within a few hours (40). It is this rapid multiplication of the ameba in the host which causes various forms of amebiasis in man. The appearance of amebiasis is world-wide, although it is more frequently observed in tropical climates (Anderson, 12). The disease appears in endemic form in Central ...

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