Objective To discuss the effect of different intension electrotherapy to rabbits'FERG,Methods Using the FERG as the target,to stimulate the TAIXI point with 0.2,0.8,2.0 and 4.0mA inrension eleetrotherapy,then observe the change of the rabbits'FERG during and after the stimulation.Results 0.8mA intension can lead to the delay of the FERG a-wave's latency obviously.The lower or higher.stimulation has little effect to the awave's latency.All kinds of stimulation to the b-wave's latency has little difference,but the effect to the amplitude has significant difference.While the stimulating intension below 2mA in 15 minutes,the b-wave's amplitude rise obviously with the intension's rising,but the amplitude will fall when the intension get to 4mA.Conclusion The effect of electrotherapy on the retina'function has osculation relationship with the electrotherapy intenmon,the best effect needs the most fitful intension of stimulation.

Objective To investigate the effect of treadmill running with different intensities on type Ⅱ collagen (Col2) of knee joint articular cartilages in rats.Methods A total of 48 adult Sprague-Dawley rats were randomly divided into a control (C) group,a low-intensity exercise (L) group,a moderate-intensity exercise (M)group and a high-intensity exercise (H) group,each of 12.Rats in three exercises groups were regularly trained on treadmill at low,moderate,and high intensities respectively.Eight weeks later,all the animals were sacrificed.The right tibial plateau samples were collected to observe collagen fibers under polarizing light microscopy,and the collagen Ⅱ content were examined using immunohistochemistry.The mRNA expression of biglycan (BGN),fibromodulin (FMOD) and Col2 was tested using the quantitative real-time reverse transcription-polymerase chain reaction.Results Compared with group C,collagen fibers in group L and M exhibited almost the same organization,whereas,alteration in organization and shape of collagen fibers was found in group H.Significantly lower content of type Ⅱ collagen was found in group H than that in group C.In comparison with group C,group L had significantly higher gene expression of Col2,whereas group H had significantly higher BGN mRNA expression.Conclusion Low-or moderate-intensity treadmill running appears to have beneficial effect on articular cartilages to maintain its integrity.Highintensity exercises induce lower content and disorder of type Ⅱ collagen in articular cartilages,but the self-healing of cartilage may still exist.

ObjectiveTo investigate the resistance character and trend of bacteria strains producing extend spectrum β-lactamase (ESBLs) in clinic.MethodsThe ESBLs-producting K. pneumoniae and E.coli producing ESBLs isolated from Apr 2001 to Mar 2004 in our hospital were screened and confirmed according to NCCLs method.ResultsK. pneumoniae and E.coli with the ESBLs phenotype were increased in recent 3 years with the resistance rate and Gm(MIC) also higher than that not producing ESBLs.ConclusionThe dection of bacteria strains producing ESBLs will be enhanced in order to provide reasonable treatment information.

An epidemiological investigation was carried out on a local cluster of outbreak caused by imported cases of Coronavirus Disease 2019 (COVID-19) in rural areas of Chengdu in December 2020, to find out the source of infection and the chain of transmission. According to
COVID-19 ; Disease Outbreaks ; Epidemics ; Humans ; Quarantine ; SARS-CoV-2