This study was aimed at identifying the pathogenic bacteria responsible for the death of a young tiger at the Fujian Meihua Mountain South China Tiger Breeding Research Institute.Tissue samples from the lungs,liver,and intestines of the deceased tiger were collected,and the bacteria were cultured inasterile environment.The bacterial strains were characterized according to their morphological and molecular biological properties,including assessment of virulence genes and antibiotic resistance genes,mouse lethality tests,and antibiotic susceptibility evaluations.A predominant bacterial strain isolated from the liver of the deceased tiger was identified as enterotoxigenic Escherichia coli(ETEC)strain Tiger22513F.Phylogenetic analysis of the 16S rRNA gene revealed that the Tiger22513F strain exhibited close genetic similarity to the reference strain ETEC(MF919609.1),with 99.9%nucleotide similarity,and resided on the same evolutionary branch.The Tiger22513F strain contained 11 antibiotic resistance genes(tetA,sul1,sul3,cmlA,floR,blaTEM,blaSHV,blaCMY-2,qnrA,qnrS,and qnrD)along with five virulence genes(VT1,fyuA,tsh,iucD,and ST).Mouse lethality tests indicated significant pathogenicity toward mice,affecting primarily the lungs,liver,and intestines.Antibiotic susceptibility testing demonstrated that this strain exhibited resistance to various classes of beta-lactam antibiotics,as well as quinolones and aminoglycosides.This investigation successfully isolated a multi-drug resistant enterotoxigenic Escherichia coli strain with pronounced pathogenicity from the liver of a deceased tiger;thus providing valuable scientific insights for clinical diagnosis,as well as prevention and control measures,against ETEC infections in South China tigers.

This study was aimed at identifying the pathogenic bacteria responsible for the death of a young tiger at the Fujian Meihua Mountain South China Tiger Breeding Research Institute.Tissue samples from the lungs,liver,and intestines of the deceased tiger were collected,and the bacteria were cultured inasterile environment.The bacterial strains were characterized according to their morphological and molecular biological properties,including assessment of virulence genes and antibiotic resistance genes,mouse lethality tests,and antibiotic susceptibility evaluations.A predominant bacterial strain isolated from the liver of the deceased tiger was identified as enterotoxigenic Escherichia coli(ETEC)strain Tiger22513F.Phylogenetic analysis of the 16S rRNA gene revealed that the Tiger22513F strain exhibited close genetic similarity to the reference strain ETEC(MF919609.1),with 99.9%nucleotide similarity,and resided on the same evolutionary branch.The Tiger22513F strain contained 11 antibiotic resistance genes(tetA,sul1,sul3,cmlA,floR,blaTEM,blaSHV,blaCMY-2,qnrA,qnrS,and qnrD)along with five virulence genes(VT1,fyuA,tsh,iucD,and ST).Mouse lethality tests indicated significant pathogenicity toward mice,affecting primarily the lungs,liver,and intestines.Antibiotic susceptibility testing demonstrated that this strain exhibited resistance to various classes of beta-lactam antibiotics,as well as quinolones and aminoglycosides.This investigation successfully isolated a multi-drug resistant enterotoxigenic Escherichia coli strain with pronounced pathogenicity from the liver of a deceased tiger;thus providing valuable scientific insights for clinical diagnosis,as well as prevention and control measures,against ETEC infections in South China tigers.

Endodontic diseases are a kind of chronic infectious oral disease.Common endodontic treatment concepts are based on the removal of inflamed or necrotic pulp tissue and the replacement by gutta-percha.However,it is very essential for endodontic treatment to debride the root canal system and prevent the root canal system from bacterial reinfection after root canal therapy(RCT).Recent research,encompassing bacterial etiology and advanced imaging techniques,contributes to our understanding of the root canal system's anatomy intricacies and the technique sensitivity of RCT.Success in RCT hinges on factors like patients,infection severity,root canal anatomy,and treatment techniques.Therefore,improving disease management is a key issue to combat endodontic diseases and cure periapical lesions.The clinical difficulty assessment system of RCT is established based on patient conditions,tooth conditions,root canal configuration,and root canal needing retreatment,and emphasizes pre-treatment risk assessment for optimal outcomes.The findings suggest that the presence of risk factors may correlate with the challenge of achieving the high standard required for RCT.These insights contribute not only to improve education but also aid practitioners in treatment planning and referral decision-making within the field of endodontics.

Objective To investigate the effects of Rhodojaponin Ⅲ on cartilage injury in post-traumatic osteoarthritis rats and its mechanism.Methods SD rats were randomly divided into sham operation group,model group(based on cruciate ligamentectomy),low dose experimental group(after modeling,0.12 mg·kg-1 Rhodojaponin Ⅲ was given by intragastric administration),high dose experimental group(after modeling,0.24 mg·kg-1 Rhodojaponin Ⅲ was given by intragastric administration),positive drug group(2 mL/100 g glucosamine sulfate was given intragastric administration after modeling).Ten rats in each group were given continuous intragastric administration for 28 days,blood was collected from the heart,and cartilage tissue was taken from the rats.Mankin's score method was used to analyze the cartilage tissue of rats in each group,Western blot method was used to detecte the proteins level,enzyme-linked immunosorbent assay(ELISA)test was used to detect the expression level of serum bone formation indexes and related factors in cartilage tissue,and kit method was used to detect the expression of oxidative stress related indexes.Results The Mankin's scores of sham operation group,model group,low dose experimental group,high dose experimental group and positive drug group were 0.10±0.30,5.30±0.46,4.00±0.63,3.10±0.54 and 1.50±0.81;bone gla protein(BGP)level were(10.25±0.77),(2.39±0.34),(4.87±0.27),(7.99±0.51)and(8.55±0.71)ng·mL-1;the expression levels of cleaved cysteine aspartate proteinase-3(Cl-caspase-3)protein were 0.25±0.02,0.86±0.06,0.65±0.05,0.47±0.04 and 0.33±0.03;superoxide dismutase(SOD)activity were(109.07±7.51),(60.24±5.73),(67.99±4.73),(76.16±8.84)and(80.11±3.96)U·mg-1;the protein levels of nuclear transcription factor E2 related factors(Nrf2)were 1.03±0.08,0.33±0.04,0.43±0.05,0.75±0.10 and 0.74±0.09;heme oxygen-1(HO-1)protein expression levels were 0.88±0.08,0.27±0.04,0.39±0.04,0.56±0.10 and 0.58±0.06,respectively.Model group compared with sham operation group,low dose experimental group,high dose experimental group compared with model group;low dose experimental group compared with high dose experimental group,the differences of the above indexes were all statistically significant(all P＜0.05).Conclusion Rhodojaponin Ⅲ may inhibit oxidative stress,inflammatory response,regulate bone metabolism and improve cartilage injury in post-traumatic osteoarthritis rats by activating Nrf2/HO-1 pathway.

Objective To observe the regulating effect of electroacupuncture on the polarization level of decidual macrophages in rats with thin endometrium and the repairing effect of electroacupuncture on thin endometrium.Methods Thirty SPF female SD rats were randomly divided into control group,model group and electroacupuncture group.The electroacupuncture group was treated with acupuncture of"Guanyuan"(CV4),"Zigong"(EX-CA1)and"Sanyinjiao"(SP6)and intervened continuously for 4 estrous cycles.After the intervention,the estrous cycle of rats in each group was observed,the number of implantation embryos in the uterus was recorded,the uterine morphology and decidualization,the thickness of endometrium,the number of glands and blood vessels were observed by HE staining,the polarization level of macrophages was detected by flow cytometry,and the expression levels of IGFBP-1,CD86 and CD206 genes were detected by qRT-PCR.Results Compared with the control group,the estrous cycle of rats in the model group was disturbed;compared with the model group,the estrous cycle of rats in the electroacupuncture group recovered;compared with the control group,the number of embryos in the model group decreased significantly(P<0.01);compared with the model group,the number of embryos in the electroacupuncture group increased(P<0.05),and the morphology of endometrium in the model group was damaged and the thickness of endometrium decreased compared with the control group(P<0.01).The number of glands and blood vessels decreased(P<0.01).Compared with the model group,the morphology of endometrium in the electroacupuncture group recovered,the thickness of endometrium increased(P<0.01),and the number of glands and blood vessels increased(P<0.01).Compared with the control group,the ratio of M2 to M1 macrophages in the model group decreased significantly(P<0.01).Compared with the model group,the ratio of M2 to M1 macrophages in the endometrium of the electroacupuncture group was significantly increased(P<0.05).Compared with the control group,the expression of IGFBP-1 mRNA in the model group decreased significantly(P<0.01),the expression of CD86 mRNA increased significantly(P<0.01),and the expression of CD206 mRNA decreased significantly(P<0.01).Compared with the model group,the expression of IGFBP-1 mRNA in the endometrium of the electroacupuncture group increased significantly(P<0.01),the expression of CD86 mRNA decreased significantly(P<0.01),and the expression of CD206 mRNA increased significantly(P<0.01).Conclusion Electroacupuncture can effectively regulate the polarization level of decidual macrophages in endometrium,and effectively repair thin endometrium,which is beneficial to embryo implantation.

Objective:To investigate the prevalence and molecular characteristics of Escherichia coli ( E. coli) producing a novel Shiga toxin 2k subtype in goat in Lanling county, Shandong province. Methods:In November 2019, 512 goat fecal samples were collected from different households in Lanling county, Shandong province. After enriched with EC broth, stx-positive samples were detected by PCR and inoculated in CHROMagar? ECC agar and CHROMagar? STEC agar. The whole genomes of stx-positive strains were sequenced. Based on the genomic senquences, the stx subtype, serotype, multi-locus sequence type and virulence genes of each strain were analyzed. Results:Eighty-six strains of Shiga toxin-producing E. coli (STEC) were isolated from 512 goat fecal samples. Five stx subtypes were identified and 37 strains were positive for stx2k. The 86 STEC strains belonged to 20 O∶H serotypes and 18 different sequence types (STs). Conclusions:STEC strains circulating in goats in Lanling county, Shandong province were heterogeneous in stx subtypes, serotypes and virulence gene profiles, and a certain proportion of strains producing a novel Shiga toxin 2k subtype were detected.

Objective To analyze the time trend of HIV epidemic and to provide basis for comprehensive HIV infection prevention among pregnant women. Methods From 2014 to 2018, continuous cross-sectional surveys were conducted among pregnant women in two maternity and child health care hospitals. 800 blood samples were collected each year to test HIV infection, syphilis and hepatitis C virus (HCV). Results A total of 4 000 eligible pregnant women completed the interview and blood testing. The awareness rate of knowledge about HIV/AIDS was 91.2%, and the rate was increasing year by year. Multivariate Logistic regression analysis showed that the awareness rate was associated with at age of more than 35, with lower education than college and the husband used to work in other places. Conclusions The rate of HIV infection among PRGs was at a low level in Taizhou.

OBJECTIVETo investigate the efficacy, advantages and disadvantages of internal and external elbow joint approach and olecranon osteotomy approach for the treatment of intercondylar fracture of humerus.

METHODSFrom October 2012 to May 2016, 18 cases of intercondylar fracture of humerus were treated by operation including 12 males and 6 females with a mean age of 33.5 years old (ranged from 4 to 56 years old); 8 cases were operated by internal and external elbow joint approach, 10 cases were operated by olecranon osteotomy approach. According to AO classification, 3 cases were type C1, 8 cases were type C2, 7 cases were type C3. All patients were excluded from neurologic and vascular injuries.

RESULTSAll patients were followed up from 12 to 26 months with an average of 15 months. The incision healed well and no heterotopic ossification was found. According to the modified Cassebaum elbow function score, the result was excellence in 14 cases, good in 3 cases, fair in 1 case.

CONCLUSIONSAccording to the fracture type, the appropriate surgical approach and fixation were selected in order to get anatomic reduction. Rigid fixation, and early functional exercise is important condition for successful operation and satisfactory functional recovery in intercondylar fracture of the humerus.

Nonalcoholic fatty liver disease(NAFLD) is a kind of metabolic liver injury, which is closely associated with insulin resistance and genetic susceptibility. Traditional Chinese herbs used in the treatment of nonalcoholic fatty liver disease are widely investigated in recent years. A series of recent studies show that the effects of the active components in traditional Chinese herbs on NAFLD are associated with activating AMPK signaling pathway, improving insulin resistance, modulating the activity and expression of peroxisome proliferator-activated receptor γ, antioxidant and anti-inflammatory activities and regulating intestinal flora. In this review, the potential therapeutic targets of the active components from traditional Chinese herbs for NAFLD would be summarized to provide a new thought for further research and clinical treatment of nonalcoholic fatty liver disease.

Objective: To evaluate the safety, efficacy and tolerability of China-made sildenafil citrate (Jinge) in the treatment of ED. METHODS: We conducted a multi-center, randomized, double-blind and placebo-controlled clinical trial among 222 ED patients in five urological or andrological clinics of China. The patients were randomly assigned to receive sildenafil citrate (SC, n = 111) or placebo (n = 111) for 8 weeks. We obtained and analyzed the demographic and clinical characteristics of the patients, the scores of International Index of Erectile Function (IIEF), the success rate of sexual intercourse, and the incidence of adverse events. RESULTS: No statistically significant differences were found between the patients of the SC and those of the placebo group in the mean age (［47.2±11.32］ yr vs ［46.67±13.08］ yr, P>0.05), psychological etiology (27.93% vs 23.42%, P>0.05), organic etiology (21.62% vs 29.73%, P>0.05) or mixed etiology (50.45% vs 46.85%, P>0.05), nor in height, weight, nationality, or history of smoking, drinking or allergy. Compared with the placebo controls, the SC-treated patients showed significant increases in the excellence rate of effectiveness (29.91% vs 78.90%, P<0.01), success rate of sexual intercourse (29.16% vs 63.87%, P<0.01), and total effectiveness rate (34.58% vs 77.98%, P<0.01). The effectiveness rates on organic, psychogenic and mixed types ED were remarkably higher in the SC group (64.52%, 83.33%, and 82.14%) than in the placebo control (46.15%, 21.21%, and 25.00%) (P<0.01). Mild or temporary adverse events were observed in 32 cases in the SC group as compared with 13 in the placebo control. CONCLUSIONS China-made sildenafil citrate is an effective, safe and well-tolerated drug for ED of different etiologies in the Chinese population.
Aged ; China ; Coitus ; Double-Blind Method ; Drug Compounding ; Erectile Dysfunction ; drug therapy ; etiology ; Humans ; Male ; Phosphodiesterase 5 Inhibitors ; therapeutic use ; Sildenafil Citrate ; therapeutic use ; Smoking ; Treatment Outcome