OBJECTIVE:To study the bacterial endotoxin test for cefotaxime sodium injection METHODS:Detection was carried out according to the principle and procedure in Chinese Pharmacopeia,2000 edition RESULTS:Cefotaxime did not interfere with limulus agent in maximal effective diluted concentration CONCLUSION:Bacterial endotoxin test could be used to replace the pyrogen test which is set in departmental standard

Objective To develop and perfect the infusion function of field operation stretcher by attaching infusion support.Methods The linking structure was developed for conveniently mounting infusion support to field operation stretcher so as to pack them off together.Results The infusion support is simple to operate,reasonable in structure,convenient to put off,and suitable for various field operation stretcher.Conclusion The field rescue,especially the quality of casualty transports,is improved.The manpower and material resources needed in on-site rescue are greatly reduced.[Chinese Medical Equipment Journal,2008,29(2):68]

Objective To analyse the encoding gene of ? lactamase of the clinically isolated Klebsiela pneumoniae 99 799 and to identify its subtype. Methods The gene of ? lactamase derived from a stain of Klebsiela pneumoniae 99 799 named as was amplified by PCR. The purified PCR product was cloned into pUCm T vector and sequenced by Sanger's dideoxy chain termination composition method. Results The encoded gene of the bacterium was identified as TEM by PCR. It had the same sequence as the gene encoding TEM 1 and positioned at the 150 bp and 80 bp plasmids. Conclusion The TEM 1 ? lactamase exists in Chongqing area.

OBJECTIVE To investigate the relationship between phenotypes and genotypes of clinical isolates of ESBLs-producing Klebsiella pneumoniae.METHODS Agar dilution method was used to test the MICs of 11 antibiotics against 67 ESBLs-producing K.pneumoniae strains.PCR was performed for amplifying ?-lactamase-encoding genes of SHV-,TEM-,and CTX-M-type,and the PCR products of some strains were cloned and sequenced to identify their gene serotypes.RESULTS With no imipenem-resistant strains among 67 strains,their resistant rates to 10 kinds of antibiotics were 10.45-89.55% The cross-resistant rates to aminoglycosides of 60 strains and to ?-lactams of 44 strains were 88.33% and 40.91%,respectively.The positive rates of SHV-,TEM-,and CTX-M-type for 67 strains were 91.04%,56.72% and 28.36%,respectively,and SHV-12,TEM-1 and CTX-M-3 genotypes were found in 7 strains by cloning and sequencing.CONCLUSIONS Sixty seven strains of ESBLs-producing K.pneumoniae present a clear feature of multi-resistance and cross-resistance to most of antibiotics except imipenem,among them there are 7 strains producing SHV-12 and CTX-M-3 extended-spectrum ?-lactamase coexistent with TEM-1 broad-spectrum ?-lactamase.

Objective: The aim of the present study was to evaluate the stability of native bovine ? casomorphin 7 in duodenum of adult rats, and the local effect on expression of cholecystokinin in intestinal mucosa. Method: (1) According to the variety of infused ? casomorphin 7 concentrations between absorptive and un-absorptive groups in vivo, its characteristic absorption in duodenum was observed. (2) To characterize the stability of the ? casomorphin 7, rat intestinal mucosa homogenate was digested and the enzyme activities were determined in vitro. (3) The effect on cholecystokinin mRNA expression of ? casomorphin 7 after luminal administration was analyzed by RT-PCR. Results:? casomorphin 7 was unable to be absorbed by intestinal epithelia and quickly degraded in the intestinal tract. It contributed to elevate cholecystokinin mRNA expression in intestinal mucosa and this effect was partly blocked by naloxone. This peptide also significantly inhibited the somatostatin mRNA expression. Conclusion: The present data demonstrated that the local effect on expression of cholecystokinin of ? casomorphin 7 might be related to opioid system and directly or indirectly affected by somatostatin.

The composition of S95-100 field mobile medical system was introduced, and some practices were summarized such as rational grouping, enhanced organization, proper allocation and etc. The problems of the system were analyzed from three aspects of the fixation of the internal devices, the rapid deployment in the plateau and maintenance in field conditions, and some measures were put forward to improve the medical support ability of the system in the plateau.

Objective To investigate the dynamic expression of the drug resistance protein P-glycoprotein (P-gp) within 72 hours in the pentylenetetrazol (PTZ)-induced status epilepticus (SE) model, and to identify the optimal detection time to inhibit P-gp. Methods mRNA and protein expressions of P-gp in rats hippocampal tissue were detected by using immunohistochemistry , RT-qPCR and Western blot at different time points after modeling (0, 3, 6, 12, 24, 48, 72 h). Results The mean density of P-gp protein in the hippocampus of status epilepticus model was 0.325 1 ± 0.008 2 at 24 h, and was 0.396 3 ± 0.016 8 at 48 h, which were consistently higher than those of the control group (P < 0.05, P < 0.01, respectively). Results of qRT-PCR showed that MDR1a expression was significantly upregulated at 24 h and at 48 h (P < 0.05, P < 0.01, respectively). Western blot assay revealed that P-gp protein was also significantly increased at 48 h after seizures (P < 0.05). Conclusions The upregulation of P-gp after SE peaked at 48 h, which maybe the optimal detection time to detect drug resistant after SE.