Objective To study characteristics of hospital infection and bacterial drug-resistance in our new Intensive Care Unit (ICU) to provide evidence to clinical rational use of drugs. Methods The data of 142 patients in our ICU last year were analyzed retrospectively, and compared to other inpatients treated in general ward during the same time period. Results Among the 142 ICU inpatients,31 times of hospital infection occurred in 22 patients,gave rise to a infection rate of 15.49% and case time infection rate of 21.83% in ICU; but among the 15 978patients treated simultaneously in general ward,413 times of hospital infection occurred in 324 inpatients, gave rise to a infection rate of 2. 03% and case time infection rate of 2. 58% outside of ICU. The hospital infection rate and case time infection rate were significantly different between the ICU and general ward (P ＜ 0. 01 ). Among the ICU infections, the lower respiratory tract infection accounted for 70. 96% ;the main pathogens were Gram-negative bacilli (65. 12% ) and Gram-positive bacilli (23.26%), follwed by fungus (11.63%). The most common bacteria were Escherichia ( 32. 65% ) and Staphylococcus ( 11.63% ). Gram-negative microorganisms were highly sensitive to cefoperazone/sulbactam,imipenem, meropenem and piperacillin/tazobactam; all Gram-positive microorganisms were sensitive to vancomycin,linezolid and teicoplanin. Conclusions The constitution,distribution and drug-resistance of pathogens in new ICU are similar to previous domestic reports. Gram-negative organisms are the main photogenic bacteria of hospital infection in ICU, and Escherichia is the most popular type in nosocomial infection.

The study mainly describes the research progress of domestic identification of similar Chinese medicinal plants and the research progress of foreign identification of similar plants, placing emphasis on the principle, merits and defects of new technology and methods including plant biotechnology, spectral identification technology and computer vision technology. With the continuous update of science and technology, the accuracy of identification of similar Chinese herbal medicine plants has been improved, and the rapid progress of identification of Chinese herbal medicine plants has been promoted. The paper mainly elaborated the latest development of plant identification technology of similar Chinese herbal medicines in depth, so as to summarize the principle and characteristics of the new technology and forecast the future prospect.

OBJECTIVETo explore a new technique to prevent the dispersal of Oncomelania hupensis snail through leading flood for irrigation by floodgate in irrigation schemes.

METHODSHydromechanical and biological were applied and to combine laboratory experiment with the field observation to form a new multidisciplinary regarding snail biological hydraulics and technical line. Findings including characteristics of hydraulics and biomechanics and move regulation etc. Physics parameter of snails were used to design and construct as well as to exam the effect of facilities and rebuilt floodgate which could prevent the snail dispersal.

RESULTSThrough five years efforts, the major achievements were found as: 1) the method in testing the special gravity of snail and snail eggs was determined. 2) the special gravity of snail was (1.8 +/- 0.01) g/cm(3) and special gravity snail eggs was (2.29 +/- 0.01) g/cm(3); the classification method and classified criterion of snail size were made based on geometrical characteristics of snail shell. Six special values indicating dropping and start speed of snail in running water were obtained; Five practical formula of snail dropping and start in water were established; threshold value and movement characteristics in water were observed and tested and move mechanism of snail dispersal in water was also clarified. Based on the findings from fundamental research, the facilities of "precipitation pool for snail" and "leading water from middle level of water body" that could prevent snail dispersal were designed and rebuilt in the endemic area. Through examination to these facilities, the rate of precipitating and blocking of snails reached 100%.

CONCLUSIONThe achievement of the study provided reliable theoretical basis for the rebuilt of floodgate and to development of models that could prevent the dispersal of snail effectively.

Agriculture ; Animals ; Disease Vectors ; Schistosomiasis ; prevention & control ; transmission ; Snails ; growth & development ; Specific Gravity