Antibiotic-resistant mechanisms of plasmid pA1137 carrying aminoglycoside resistance gene aacC2 / 军事医学

Objective To achieve detailed genomic characterization and investigate the antibiotic-resistant mechanisms of plasmid pA1137 carrying the aminoglycoside resistance gene aacC2.Methods Antibiotic-resistant genes were deter-mined by PCR.Conjugation experiments were performed to verify the transferability of plasmid pA 1137.The minimum in-hibitory concentration(MIC)values of bacterial strains were tested with microdilution method.The genetic background, mobile elements and antibiotic resistance mechanisms of pA 1137 were determined using a whole genome sequencing meth-od.Results Both carbapenem-resistant gene blaIMP-8and aminoglycoside-resistant genes aacC2 and aacA4 were carried by A1137 isolated from Enterobacter cloacae(ECL).aacC2 was located in plasmid pA1137 while the other two resistant genes were observed in chromosomes.Plasmid pA1137 was an IncFⅡplasmid,whose total length was 68.97 kb,and GenBank accession number was MF190369.Plasmid pA1137 contained multiple replicons and intact conjugative transfer regions,so it could be transferred into ECL through conjugation experiments and confer corresponding antibiotic resistance to the transconjugant A1137-EC600.Conclusion IncFⅡ plasmid pA1137 has a single accessory region, the first reported Tn5403-based aacC2-tmrB-related region,which can cause stable inheritance and mediate the resistance to aminoglycoside antibiotics in ECL A1137.

Evaluation of the effects of standard rescue procedure on severe trauma treatment in china / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>This study aimed to evaluate the effects of standard rescue procedure (SRP) in improving severe trauma treatments in China.</p><p><b>METHODS</b>This study was conducted in 12 hospitals located in geographically and industrially different cities in China. A standard procedure on severe trauma rescue was established as a general rule for staff training and patient treatment. A regional network (system) efficiently integrating prehospital rescue, emergency room treatments, and hospital specialist treatments was built under the rule for information sharing and improving severe trauma treatments. Treatment outcomes were compared between before and 1 year after the implementation of the SRP.</p><p><b>RESULTS</b>The outcomes of a total of 74,615 and 12,051 trauma cases were collected from 12 hospitals before and after the implementation of the SRP. Implementation of the SRP led to efficient cooperation and information sharing of different treatment services. The emergency response time, prehospital transit time, emergency rescue time, consultation call time, and mortality rate of patients were 24.24 ± 4.32 min, 45.69 ± 3.89 min, 6.38 ± 1.05 min, 17.53 ± 0.72 min, and 33.82% ± 3.87% (n = 441), respectively, before the implementation of the standardization and significantly reduced to 10.11 ± 3.21 min, 22.39 ± 4.32 min, 3.26 ± 0.89 min, 3.45 ± 0.45 min, and 20.49% ± 3.11%, separately (n = 495, P < 0.05) after that.</p><p><b>CONCLUSIONS</b>Staff training and SRP can significantly improve the efficiency of severe trauma treatments in China.</p>

Association of toll-like receptor 4 signaling pathway with steroid-induced femoral head osteonecrosis in rats / 华中科技大学学报（医学）（英德文版）

Osteonecrosis of the femoral head is frequently observed in patients treated with excessive corticosteroids. However, the pathogenesis of corticosteroid-induced osteonecrosis remains unclear. The purpose of this study was to investigate the role of Toll-like receptor 4 (TLR4) signaling pathway in steroid-induced femoral head osteonecrosis in rats. Male Sprague-Dawley rats were injected intramuscularly with 20 mg/kg methylprednisolone (MP) for 8 weeks, twice per week. The animals were sacrificed at 2, 4 and 8 weeks after the last MP injection, respectively, and then allocated to the 2-, 4- and 8-week model groups (n=24 each). Rats in the control group (n=12) were not given any treatment. Histopathological analysis was performed and the concentration of tartrate-resistant acid phosphatase (TRAP) in plasma was determined. The activation of osteoclasts in the femoral head was assessed by TRAP staining. The expression of TLR4, MyD88, TRAF6 and NF-κB p65 that are involved in TLR4 signaling, and MCP-1 production were detected by using real-time PCR (RT-PCR) and Western blotting. The results showed that the osteonecrosis in the femoral head was clearly observed and the concentration of TRAP in the plasma was increased in the model rats. The femoral head tissues in MP-treated rats were positive for TRAP and the intensity of TRAP staining was greater in MP-treated rats than in control rats. As compared with the control group, the mRNA expression of TLR4 signaling-related factors was enhanced significantly at 4 and 8 weeks, and the protein levels of these factors increased significantly with time. It was concluded that MP could induce the femoral head osteonecrosis in rats, which was associated with osteoclast activation via the TLR4 signaling pathway. These findings suggest that TLR4 signaling pathway plays a pivotal role in the pathogenesis of steroid-induced osteonecrosis.

Association of toll-like receptor 4 signaling pathway with steroid-induced femoral head osteonecrosis in rats / 华中科技大学学报（医学）（英德文版）

Osteonecrosis of the femoral head is frequently observed in patients treated with excessive corticosteroids. However, the pathogenesis of corticosteroid-induced osteonecrosis remains unclear. The purpose of this study was to investigate the role of Toll-like receptor 4 (TLR4) signaling pathway in steroid-induced femoral head osteonecrosis in rats. Male Sprague-Dawley rats were injected intramuscularly with 20 mg/kg methylprednisolone (MP) for 8 weeks, twice per week. The animals were sacrificed at 2, 4 and 8 weeks after the last MP injection, respectively, and then allocated to the 2-, 4- and 8-week model groups (n=24 each). Rats in the control group (n=12) were not given any treatment. Histopathological analysis was performed and the concentration of tartrate-resistant acid phosphatase (TRAP) in plasma was determined. The activation of osteoclasts in the femoral head was assessed by TRAP staining. The expression of TLR4, MyD88, TRAF6 and NF-κB p65 that are involved in TLR4 signaling, and MCP-1 production were detected by using real-time PCR (RT-PCR) and Western blotting. The results showed that the osteonecrosis in the femoral head was clearly observed and the concentration of TRAP in the plasma was increased in the model rats. The femoral head tissues in MP-treated rats were positive for TRAP and the intensity of TRAP staining was greater in MP-treated rats than in control rats. As compared with the control group, the mRNA expression of TLR4 signaling-related factors was enhanced significantly at 4 and 8 weeks, and the protein levels of these factors increased significantly with time. It was concluded that MP could induce the femoral head osteonecrosis in rats, which was associated with osteoclast activation via the TLR4 signaling pathway. These findings suggest that TLR4 signaling pathway plays a pivotal role in the pathogenesis of steroid-induced osteonecrosis.

Construction of biofilm formation related mutants in Vibrio parahaemolyticus / 中华预防医学杂志

<p><b>OBJECTIVE</b>To construct the mutants of biofilm related genes in Vibrio parahaemolyticus and confirm the mutants.</p><p><b>METHODS</b>The homologous upstream and downstream flanking fragments of target gene were amplified by using PCR, and the fusion homologous fragment was amplified by using the two flanking fragments as template. Then the fusion homologous fragment was digested by restriction enzyme and cloned into suicide plasmid pDS132. The recombinant plasmid was transferred into Vibrio parahaemolyticus RIMD 2210633 through conjugation. The mutants were screened and identified by PCR and the phenotype of one mutant was analyzed in order to verify that the mutants were constructed successfully.</p><p><b>RESULTS</b>Six recombinant plasmids carrying the fusion homologous fragments of genes vbfR, crp, hns, swrZ, swrT and cpsR respectively were constructed and identified by PCR. The amplification products of 1190, 1128, 1136, 953, 1242 and 1112 bp were obtained respectively. The six mutants (ΔvbfR, Δcrp, Δhns, ΔswrZ, ΔswrT and ΔcpsR) were constructed using recombinant plasmids. Verified by PCR, the size of amplification products of mutants (1190, 1128, 1136, 953, 1242 and 1112 bp respectively) was less (610, 739, 421, 542, 427 and 1367 bp respectively) than the corresponding positive control. Meanwhile, none of the products was amplified using the primers locating on the target gene. One mutant Δhns was selected to test the ability of biofilm formation. The result showed that the ability of biofilm formation of mutant Δhns was increased compared with the wild type.</p><p><b>CONCLUSION</b>Six mutants of biofilm related genes in Vibrio parahaemolyticus were constructed and tested by molecular and phenotype experiment to confirm that the mutants were constructed successfully.</p>

Effects of quercetin on serum levels of resistin and IL-18 and on insulin resistance in nonalcoholic fatty liver disease rats / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To investigate the effects of quercetin on serum levels of resistin and interleukin (IL)-18 and incidence of insulin resistance (IR) in nonalcoholic fatty liver disease (NAFLD) using a rat model.</p><p><b>METHODS</b>NAFLD was induced in Sprague-Dawley rats by administering a high-fat diet for four weeks. The model rats were then treated with quercetin (oral gavage administration; low dose group: 75 mg/kg/day, high dose group: 300 mg/kg/day) for eight weeks. Untreated model rats served as controls. Serum levels of resistin, triglyceride (TG), IL-18, fasting plasma glucose (FPG), fasting insulin (FINS), and malondialdehyde (MDA) were measured by standard biochemical assays before and after the quercetin administration. In addition, the insulin resistance index (HOMA-IR) was calculated and pathological changes in liver were observed by histological analysis.</p><p><b>RESULTS</b>Compared to the untreated model rats, the quercetin treated model rats showed significantly lower serum resistin (5.98 vs. 2.70), serum IL-18 (10.93 vs. 8.21), FPG (7.45 vs. 4.99), FINS (12.69 vs. 8.59), and HOMA-IR (4.22 vs. 1.87) (all P less than 0.01). Compared to the untreated model group, the high dose group showed significantly lower TG (t = 4.70) and MDA (t = 5.14) (both P less than 0.01). Serum levels of resistin and IL-18, and levels of TG, FPG and FINS were found to be positively correlated with HOMA-IR and the degree of liver disease (r more than 0, all P less than 0.05). The degree of degeneration was decreased in accordance with the dosages of quercetin, as compared to the untreated model group (U = 4.41 and 2.19, both P less than 0.05), and the pathological degree was less extensive in the high dose group than in the low dose group (U = 2.44, P less than 0.01).</p><p><b>CONCLUSION</b>Quercetin treatment reduces levels of inflammatory cytokines and improves lipid peroxidation and IR in NAFLD rats, and its beneficial effects appear to increase with higher dosage.</p>

Therapeutic efficacy and mechanisms of quercetin in a rat model of nonalcoholic fatty liver disease / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To determine the efficacy of the plant-derived bioflavonoid, quercetin, for treating nonalcoholic fatty liver disease (NAFLD) by using a rat model, and to investigate the molecular mechanism underlying its therapeutic effects.</p><p><b>METHODS</b>One-hundred Sprague-Dawley rats were randomly assigned into the normal control group (normal group), untreated NAFLD model control group (model group), 75 mg/kg/day quercetin treatment group (low-dose group), and 300 mg/kg/day quercetin treatment group (high-dose group). The NAFLD rat model was established by providing four weeks of a high-fat diet; the normal group received normal rat chow diet. The quercetin treatments were administered for eight weeks after model establishment and control groups received simultaneous gavages of isotonic saline, with continuation of the respective diets. At the end of the eight weeks (experimental week 12), the rats were sacrificed for liver and serum collection. Intergroup differences in liver index, fasting blood glucose (FBG), triglycerides (TG), interleukin (IL)-18, IL-10, malondialdehyde (MDA), and histopathological features were assessed by independent samples t-test (normal vs. model), one-way ANOVA (model vs. treatments), and least significant difference t-test (pairwise comparisons); correlations were assessed by Pearson's correlation coefficient.</p><p><b>RESULTS</b>Compared with the normal group, the model group showed significantly higher liver index (t=-2.327), FBG (t=-3.482), TG (t=-0.302), and serum IL-18 (t=-2.704) (all P less than 0.05), but significantly lower IL-10 (t=2.622, P less than 0.05); the MDA level was also higher in the model group, but the difference was not significant (t=-1.083, P less than 0.05). Livers from the model group showed obvious histological features of inflammation (lymphocyte and neutrophil infiltration) and steatosis (cytoplasmic lipid droplets). Inflammation was positively correlated with IL-18 (P less than 0.05), but negatively correlated with IL-10 (P less than 0.05), while steatosis was negatively correlated with IL-10 (P less than 0.05). Compared to the model group, quercetin treatment (both low- and high-dose) led to significant decreases in the liver index, FBG and IL-18 (all, P less than 0.01), and significant increase in IL-10 (P less than 0.05); however, the changes in liver index, FBG and IL-10 were not significantly different between the low- and high-dose treatment groups, but the high-dose of quercetin did induce a significantly greater decrease in IL-18 than the low-dose (P less than 0.05).</p><p><b>CONCLUSION</b>NAFLD rats have higher serum levels of IL-18 but lower levels of IL-10 than their healthy counterparts, and these differential cytokine expressions may be related to liver inflammation and steatosis. Quercetin treatment may help to delay the progression of NAFLD, possibly by adjusting the balance of inflammatory cytokines.</p>

Ecological-geographic landscapes of natural plague foci in China VIII. Typing of natural plague foci / 中华流行病学杂志

Since plague is an important natural focus zoonosis, the typing of natural plague foci becomes one of the elements in understanding the nature and developing related prevention program of the disease. Natural foci of plague are composed by four fundamental parts which include Eco-geographical landscape (natural plague foci), hosts, vectors and pathogens (Yersinia pestis) that comprehensively interact through the large temporal scale of evolution. Human activities have had great impact on the foci of natural plague. Based on the published serial research papers, we tried to integrate the knowledge of each factor in natural plague foci and focusing on theoretical aspects, so as to strengthen the prevention and surveillance programs of plague to be extrapolated to other zoonosis.

Use of rich BHI medium instead of synthetic TMH medium for gene regulation study in Yersinia pestis / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>This study is to verify the use of rich BHI medium to substitute synthetic media for gene regulation studies in Yersinia pestis.</p><p><b>METHODS</b>The transcriptional regulation of rovA by PhoP or via temperature upshift, and that of pla by CRP were investigated when Y. pestis was cultured in BHI. After cultivation under 26 °C, and with temperature shifting from 26 to 37 °C, the wild-type (WT) strain or its phoP or crp null mutant (ΔphoP or Δcrp, respectively) was subject to RNA isolation, and then the promoter activity of rovA or pla in the above strains was detected by the primer extension assay. The rovA promoter-proximal region was cloned into the pRW50 containing a promoterless lacZ gene. The recombinant LacZ reporter plasmid was transformed into WT and ΔphoP to measure the promoter activity of rovA in these two strains with the β-Galactosidase enzyme assay system.</p><p><b>RESULTS</b>When Y. pestis was cultured in BHI, the transcription of rovA was inhibited by PhoP and upon temperature upshift while that of pla was stimulated by CRP.</p><p><b>CONCLUSION</b>The rich BHI medium without the need for modification to be introduced into the relevant stimulating conditions (which are essential to triggering relevant gene regulatory cascades), can be used in lieu of synthetic TMH media to cultivate Y. pestis for gene regulation studies.</p>

Management of hemodynamically unstable pelvic fracture in pregnancy: a case report and review of literature / 中华创伤杂志(英文版)

We present an unusual case of an unstable pelvic fracture during pregnancy period, who suffered fetal death and splenic rupture simultaneously which developed massive delayed hemorrhage in abdomen. When considering potential causes of fetal death, direct trauma to the uterus, placenta, or fetus was not associated with a higher fetal mortality rate, compared with maternal hemorrhage. A cesarean section and splenectomy could rescue the maternal life from the hemorrhage situation. Successful treatment of these rare cases is possible with careful pre-, peri-, and post-operative evaluation of the mother and fetus by a multidisciplinary team.

Surgical management of penetrating pelvic trauma: a case report and literature review / 中华创伤杂志(英文版)

High-velocity penetrating pelvic injury is one of the most difficult challenges to trauma surgeons. The injury sites frequently include soft tissue, pelvis, genitourinary tract, vascular structures and intraabdominal viscera. We present an unusual case of a male patient suffering a collision at night with a deformed steel bar penetrating into his right groin. Careful planning of the surgical approach is important before extracting the foreign body. The possibility of multiorgan damage to intrapelvic structures such as colon, urinary bladder, vessels and nerves, frequently necessitates a multidisciplinary involvement and systematic approach. Besides, limited incision as well as modification should be considered, and debridement and perioperative antibiotics can be used to reduce the risk of serious wound infection.

Ecological-geographic landscapes of natural plague foci in China Ⅶ.Typing of natural plague foci / 中华流行病学杂志

Objective To group and characterize natural plague foci in China.Methods A novel two-class typing method as well as a three-indication nomenclature method were established to group and characterize the natural plague foci,on the basis of eco-geographical landscapes of plague foci,genetics of Yersinia pestis,zoology of rodent reservoirs and the entomology of flea vectors.Results A total of 12 distinct natural plague foci (including 19 subtypes) as well as their biological features were characterized.Conclusion Natural plague foci in China were grouped and characterized in this study.

Design of ABC damage variable and positioning system for acetabular fractures and 1122 cases multi-center statistic analysis / 中国骨伤

<p><b>OBJECTIVE</b>To design ABC damage variable and positioning system for acetabular fracture and explore the feasibility and clinical practical value of the system through the multi-center analysis of 1122 acetabular fractures.</p><p><b>METHODS</b>According to acetabular three-column conception, and pelvic ring lesions damage direction caused by acetabular fracture domino effect and injury degree of proximal femur joint, it defined class A as any column acetabular fracture; class B as any two-column acetabular fracture; class C as front, dome and posterior mixture acetabular fracture. Lower case English letters a, m, p represented front, dome, posterior fracture, respectively. Acetabular damage variables: 1 was simple displaced fractures; 2 was comminuted fractures; 3 was compression fractures. Pelvic ring lesions damage variables: alpha was sacroiliac joints or sacroiliac fracture horizontal separation deflection; beta was sacroiliac joints or sacroiliac fracture vertical separation deflection; gamma was pubic symphysis separation/superior and inferior ramus of pubis fracture deflection; alpha beta gamma delta was compound floating damage. Proximal humerus joint damage variables: I was femoral head fracture; II was femoral neck fracture; II was intertrochanteric fractures of femur; IV was I to III compound fracture. The ABC damage variable positioning system for acetabular fracture was made up by the above-mentioned variables. The statistics from March 1997 to February 2010 showed 1122 cases acetabular fractures with 18 cases of double side acetabular fracture and 1140 cases of acetabular fractures. The pelvics anterior-posterior view, ilium and obturator oblique view, and 2/3D-CT materials were analyzed and researched.</p><p><b>RESULTS</b>Each damage variables distribution situation in 1140 cases of acetabular fracture involved A in 237 cases (20.8%), B in 605 cases (53.1%), C in 298 cases (26.1%);front column fracture in 808 cases(70.9%), dome fracture in 507 cases (44.5%), posterior fracture in 1026 cases (90%). Acetabular variables: variabe 1 in 203 cases of simple displaced fracture (17.8%); variabe 2 in 516 cases of comminuted fracture(45.3%); variabe 3 in 421 cases of compression fracture (36.9%); 249 cases of pelvic ring lesions damage (21.8%), 75 cases femoral head fracture (6.6%); 18 cases of double side acetabular fracture and relative pelvic ring and proximal humerus joint variables (1.58%). Key part and curative effect elements of 1140 cases acetabular fracture: 507 cases of dome or posterior acetabular fracture (44.5%); 421 cases of compression fracture (36.9%); 249 cases of pelvic ring variables (21.8%); 75 cases of proximal humerus joint variables (6.6%); 486 cases of simple Aa/pl/2,Bapl/2 acetabular fracture (42.6% ).</p><p><b>CONCLUSION</b>Compression fracture, especially defected compression fracture, takes important part in acetabular damage variables, and also presents that acetabular fracture with pelvic ring and proximal femoral damage variables are not rare at all. The relationship of the acetabular fracture damage variables, and its percentage shows the key points and elements in clinical treatment: weight-bearing to dome accounts for 44.5%; compression to defects account for 36.9%, pelvic ring to float accounts for 21.8%; dome fracture to double side fracture account for 6.6%. The system has significant guiding effects on clinic in terms of evaluation of injury severity, anatomic localization, difficulty index, alternative strategy, operative approach, effect of treatment,and prognosis. And the most important thing is that the system creates the comparison of damage variables in same type of fracture and the communication of homo-language and explores a new method.</p>

Operative treatment of the scapular fractures through modified Judet approach / 中华外科杂志

<p><b>OBJECTIVE</b>To investigate the effect of operative treatment of scapular fractures through modified Judet approach.</p><p><b>METHODS</b>From January 1997 to October 2005, 21 patients (15 females, 6 males; mean age 34 years) of scapular fractures were treated by open reduction and internal fixation through the modified Judet approach. According to Hardegger classification system, there were 11 patients of scapular body fractures, 10 patients of scapular neck fractures, 8 patients of glenoid rim fractures, 7 patients of glenoid fossa fractures, 9 patients of scapular spine fractures, and 6 patients of scapular acromion fractures.</p><p><b>RESULTS</b>Eighteen patients were followed up with an average of 21 months (range 6 months-4 years). According to Rowe scores system, 12 patients showed excellent, 3 showed good, 2 showed fair, and 1 showed poor.</p><p><b>CONCLUSIONS</b>The modified Judet approaches have the advantages of wide exploration, safety, and easy fixation. It is a good choice to the operation for most types of scapular fractures through the modified Judet approach.</p>

A molecular epidemiological study on human plague fulminant epidemic in Qinghai, 2004 / 中华流行病学杂志

<p><b>OBJECTIVE</b>To study the epidemiology of genotyping Yersinia pestis isolated in the fulminant epidemics of human plague in Qinghai province in 2004.</p><p><b>METHODS</b>Primer pairs targeting the twenty-three different identified regions (DFRs) were designed to detect the presence or deletion of each DFR in 13 strains of Yersinia pestis isolated from the fulminant epidemic of human plague in Qinghai province in 2004.</p><p><b>RESULTS</b>There were 4 genomovars, i.e. Genomovar 8, 10, 15 and 16 in the 13 strains of Yersinia pestis identified. The genomovar of all the strains of Yersinia pestis isolated from Nangqian county was Genomovar 10. Among the two strains of Yersinia pestis isolated from Wulan county, the genomovar of one strain was Genomovar 8 and the other was Genomovar 10. The genomovars of all the strains of Yersinia pestis isolated from Qilian, Qumalai and Chengduo county belonged to Genomovar 16.</p><p><b>CONCLUSION</b>It was demonstrated that the genotyping of Yersinia pestis appeared to be a powerful tool for investigating human plague epidemics.</p>

Study on the genotyping and microevolution of Yersinia pestis in the Qinghai-Tibet Plateau / 中华流行病学杂志

<p><b>OBJECTIVE</b>To study the distribution of genomovars and microevolution of Yersinia pestis in the Qinghai-Tibet Plateau.</p><p><b>METHODS</b>Primer pairs targeting the twenty-two different regions(DFRs) were designed for detecting the presence or deletion of each DFR in 297 strains isolated from the Qinghai-Tibet Plateau.</p><p><b>RESULTS</b>9 genomovars, i. e. Genomovar 1, 5, 6, 7, 8, 10, 11, new type and Ype-ancestor were identified in the Marmota himalayana plague focus of the Qinghai-Tibet Plateau. Among these genomovars, genomovar 5,8 and 10 were dominant types. The total rate of the three genomovars was 80.6% (204/253) and the genomovars in different regions were different. All of 44 strains of Y. pestis in the Microtus fuscus plague focus of the Qinghai-Tibet Plateau belonged to genomovar 14.</p><p><b>CONCLUSION</b>The distribution of genomovars of Y. pestis in the Qinghai-Tibet plateau had remarkable characteristics geographically. Based on the distribution of genomovars of Y. pestis, the routes of transmission and microevolution of Y. pestis were proposed.</p>

The diagnosis and treatment of severe cerebral fat embolism / 中华创伤杂志(英文版)

<p><b>OBJECTIVE</b>To improve the diagnosis and treatment of severe cerebral fat embolism (SCFE).</p><p><b>METHODS</b>The data of nine patients with SCFE were retrospectively analyzed. The manifestations of the central nerve system, respiratory system and hemorrhage were recorded, at the same time, accessory examination including arterial oxygen, fat macroglobules in venous blood and image examination was adapted. The patients were treated with exopexy, pharmocotherapy and oxygentherapy.</p><p><b>RESULTS</b>Two of the nine patients died of severe complications, the other seven recovered without severe sequela.</p><p><b>CONCLUSIONS</b>Gurd standard should be improved for early diagnosis of SCFE. If svere complications can be prevented, patients who receive early treatment will have favourable prognosis.</p>