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An outbreak of food-poisoning caused by a urea-hydrolyzing strain of Vibrio parahaemolyticus
1989
Muramatsu, K. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Wada, M.
An outbreak of food-poisoning caused by a urea-hydrolyzing strain of Vibrio parahaemolytictis is presented. In the outbreak, urea-hydrolyzing V. parahaemolyticus was the only suspected etiological agent isolated from patients. In other respects, the strains conformed to the general characteristics of V. parahaemolyticus. The isolates were positive to the Kanagawa phenomenon and thermal direct hemolysin test. Urea-hydrolyzing strains of V, parahaemolyticus have rarely been reported and have not been described previously as a cause of food-poisoning in Japan. Eleven urea-hydrolyzing strains were found among the strains of V. parahaemolyticus isolated in our laboratory previously from various materials. Six of them were isolated from travellers to South-East Asia. A total of 16 strains of urea-hydrolyzing V.pamkaemolyticus was typed into 7 serovars (e. g. O4: K12, O6: K18, O1 : KUT. O3: K15 etc.).
显示更多 [+] 显示较少 [-]A sporadic outbreak of hepatitis A
1989
Nishizawa, S. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Nakamura, K. | Koyama, T.
Present condition of groundwater pollution in Nagano prefecture [Japan]
1989
Terasawa, J. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Miyajima, I. | Harada, T.
Sewage treatment in an oxidation ditch plant on Kita-shiga heights [Japan]
1989
Ozawa, H. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Suzuki, T. | Itoh, S. | Matsui, M. | Furihata, A.
The removal of organics and nitrogen was investigated in a sewage treatment plant by oxidation ditch process. Influent and effluent samples were taken each month for the 2-year period and examined. The wastewater with average BOD value of 240 mg/l was treated in an oxidation ditch at a periodical average MLSS concentration of 3,100 mg/l. Average BOD of the effluent was 19 mg/l and BOD removal averaged 94%. Average total-N in the effluent was 11 mg/l, the bulk of which was composed of Kjeldhal-N, and nitrogen removal averaged 74%. Alkalinity reduction was about 3 mgCaCO3/l per apparent decrease of 1 mg/l ammonia-N, though the theoretical value by nitrification is 7.14 mgCaCO3/l, and no large pH drop was observed in the effluent. Alkalinity loss by nitrification was considered to be mitigated by generation of alkalinity by deamination and denitrification. Apparent 50% ammonia-N removal corresponded to the residual alkalinity of 110 mgCaCO3/l.
显示更多 [+] 显示较少 [-]Survey of pesticide residues in vegetables and fruits for the past fifteen years
1989
Yoshida, F. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Yamaura, Y.
In situ immobilization of heavy-metal-contaminated soils
1989
Czupyrna, G.
Effects of air pollution on western forests
1989
Olson, Richard K. | Lefohn, Allen S.
Scientific monitoring strategies for ocean waste disposal
1989
Hood, D. W. (Donald Wilbur) | Schoener, Amy | Park, P. Kilho (Paul Kilho)
Air pollution modeling and its application VII
1989
Dop, H. van (Han)
