A Comlp.arison Of Surface Antigens Of Four Leishmania Sp.ecies (l. Aethiopica Donovani L. Major And L. Tropica)

Five tea clones of the C. assamica variety grown in Wushwush tea plantation farms, Ethiopiarnwere analyzed for their contents of essential, non-essential and toxic metals (K, Ca, Mg, Fe, Mn,rnCu, Zn, Na, Cd and Pb) by atomic absorption flame emission spectroscopy. Among thernmacronutrient metals, K was the most abundant element in the tea leaves and soils. Both the tearnleaves and the soils showed similar accumulation pattern in their contents of the studiedrnmacronutrients.rnMn was the predominant micronutrient heavy metal in the tea leaves tissue. Level of Fe in thernleaf tissue was found to be the second abundant micronutrient next to Mn whereasrnconcentrations of Cu and Co were relatively lower both in the soil and tea samples. Fortunately,rnthe toxic heavy metals Pb and Cd in the leaf tissues were too low to be detected by the analyticalrntechnique used in this study.rnThe soils were observed to be acidic (pH 5.04 - 5.49) with high organic matter (5.48 - 6.02%).rnFe was the most abundant metal followed by Mn, Na and Zn in the soils. Unlike the tea leaves,rnthe soils were found to contain the toxic metal, Cd (0.02 - 1.10 mg/kg). The levels of most of thernmetals determined in this study compared well with those reported for tea leaves from somernother parts of the world.rnKey words: Tea clones, Tea leaves, Macronutrients, Micronutrients, Toxic metals, Organicrnmatter, Atomic absorption flame emission spectroscopy.

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