Review

• Tolerance to Environmental Stress: Important Characteristics for Utilization of Yeast......Jun SHIMA...... 81

Originals

• Survival and Recovery of Escherichia coli O157 : H7 on Lettuce, Cabbage and Cucumber Treated with Chlorinated Water......Eiichi NAZUKA, Yasuhiro INATSU, M. L. BARI, Susumu KAWASAKI, Masato MIYAMARU and Shinichi KAWAMOTO...... 89
• The Investigation of Bacterial Contamination in the Foods Packaged in Hermetically Sealed Containers......Kazumi HORIKAWA, Mitsuhiro HAMASAKI, Koichi MURAKAMI, Yasuhisa ISHIGURO, Hiromi HIJI, Hidetoshi NAGANO and Keiji OGUMA...... 95
• Bacteria in Traditional Fermented Vegetables Produced in Northern Part of Vietnam......Yasuhiro INASU, M. Latiful BARI, Susumu KAWASAKI and Shinichi KAWAMOTO...... 103

Short Paper

• Study on Colorimetric Cell Metabolic Assay for Bacillus cereus Emetic Toxin......Tetsuya AKIBA, Takashi CHIBA, Teruyoshi ARAI, Mikiyoshi SHIBATA, Akihiro IBE, Yoshitoki YANAGAWA, Akemi KAI, Kazuyoshi YANO and Satoshi MOROZUMI...... 112

Epidemiology

• Evaluation of Test-tube Culture Methods for Isolating Campylobacter spp. from Retail Chickens -Comparison of Isolation Rates with or without Microaerobic Condition-......Kazuaki ONO, Yoko ANDO, Yukie OZEKI and Keiko YANAGAWA...... 116

Book Review

• Takeo Fujii...... 120

• Proceeding of the Society ...... 121
• Information ...... 124