Tokyo, June 5, 2006 (JCN) - Toyama Chemical has filed a new drug application for T-3811, its proprietary antibiotic agent, with the Ministry of Health, Labor and Welfare. A new-type quinolone antibiotic, T-3811 has a wide antibacterial spectrum and beneficial effects on PRSPiPenicillin-resistant Streptococcus pneumoniaejand MRSA (Methicillin-resistant Staphylococcus aureus).