Rome, June 10 - The Organisation for Economic Cooperation and Development (OECD) on Monday confirmed the "positive change" taking place in Italy's economy already noticed in April and May. The OECD noted in its June index of leading indicators signs of improvement in Italy. In addition it cited "moderate growth improvement in most big economies". The Paris-based organization said signs of recovery were continuing to manifest in the eurozone and that Germany's growth was returning to trend. The United States and Japan were the only countries where growth is firming, the report said.