Copper ions uptake by T. farahensis in modified Neff’s medium with 30 µg/ml of copper. Organisms showed maximum uptake during first 24 h. A total of 54.9 % of copper ions were removed by the cells (pellet) from the medium during 96 h of metal exposure. A corresponding decrease in the concentration of Cu++ in the medium indicates that the metal has been taken up by the cells (pellet).