Review

• Nuisance Microorganisms in Water Supply Systems -Cyanobacteria- ......Naohiro KISHIDA and Michihiro AKIBA...... 195

Short Paper

• Examination of a Rapid and Simple Detection for Yeast and Mold from Margarine Using the QUALIBAXTM System ......Hideki KITAZAWA, Takayuki MORITA, Kenzo UEHASHI and Satoshi MOROZUMI...... 202

Epidemiology

• Influence of Dry Condition on the Ethanol-induced Finger Disinfection in Hand-washing ......Kazuyasu MURAKAMI, Saori FUJII, Haruyo SUGIYAMA, Rie TADA and Junko TAMAGAWA...... 208

Case

• The Cases of Norovirus Detected from Food Industry Workers in Stool Specimens ......Yuko UEMA, Keisuke FUKUMURA, Akira OSHIMA and Hiroshi NAKAGAWA...... 212

• Book Review...... 216
• Proceeding of the Society...... 217
• Information...... 225
• Cumulative Contents of Volume 26...... 226