On the other hand, pathogenic viruses, bacte-ria, protozoa and fungi have their own specificrequirements of certain trace elements such as iron, zinc and manganese. The malarial organism (Plasmodium) and pathogenic amoeba (e.g. Entamoeba histolytica) and their inf luence on the iron status of the host are cases in point. In situations in which sanitary or antimicrobial control cannot stem parasitic transmission, individuals having lower reserves of iron may be relatively protected against the proliferation of these pathogens
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