Fungi are heterotrophic eukaryotes which are able to solubilise metals from nickel laterite minerals by the formation of organic acids (Bosecker, 1997). Metal dissolution is achieved through a series of reactions including acidolysis, complex and chelate formation (Burgstaller and Schinner, 1993 and Brandl, 2001). Laterite nickel ores are commercial source of nickel and are produced by decomposition and weathering of peridotite (nickel bearing mafic rock) and serpentinites. Most lateritic deposits occur either in tropical regions on in regions where the climate has been at least sub-tropical in past geologic epochs, as in Oregon and California. An abundance of rainfall and decomposing vegetable matter furnishes organic acids and carbon dioxide to the ground water. Although sulphide ores have provided the bulk of nickel, in the near future exploitation of lateritic deposits will continue at a greater rate as high grade sulfide minerals are depleted. In addition, these mineral oxides represent about 85% of the known nickel reserves of the world.