Diagnosis of urinary tract infection in infants under 3 months with fever without a source: reliability of urinalysis and urine culture / Diagnóstico de infección del tracto urinario en lactantes menores de 3 meses con fiebre sin foco identificado: fiabilidad del análisis de orina y urocultivo

Abstract Background: Urinary tract infection (UTI) is infants´ most common serious bacterial infection. This study aimed to investigate the reliability of urianalysis (UA) to predict UTI, to specify the colony forming units (CFU)/ml threshold for diagnosis, and to identify variables that help suspect bacteremia in infants under 3 months with UTI. Methods: We reviewed clinical records of children under 3 months hospitalized for a fever without source and recorded age, sex, days of fever pre-consultation, temperature and severity at admission, discharge diagnoses, laboratory tests, and treatments. According to the discharge diagnosis, we divided them into UTIs (-) and (+) with or without bacteremia. Results: A total of 467 infants were admitted: 334 with UTI and 133 without UTI. In UTIs (+), the pyuria had a sensitivity of 95.8% and bacteria (+) 88.3%; specificity was high, especially for nitrites (96.2%) and bacteria (+) (92.5%). Positive predictive value (PPV) for nitrites was 95.9%, for bacteria 96.7%, and oyuria 92.5%. Escherichia coli was present in 83.8% of urine and 87% of blood cultures. UTIs with bacteremia had inflammatory urinalysis, urine culture > 100,000 CFU/ml, and higher percentage of C reactive protein (CRP) > 50 mg (p= 0.002); 94.6% of the urine culture had > 50,000 CFU. Conclusions: The pyuria and bacteria (+) in urine obtained by catheterization predict UTI. The cut-off point for diagnosis was ≥ 50,000 CFU/ml. No variables to suspect bacteremia were identified in this study.

Resumen Introducción: La infección del tracto urinario (ITU) es una infección bacteriana grave frecuente en lactantes. El objetivo de este trabajo fue investigar la fiabilidad del análisis de orina (AO) para predecirla, precisar el umbral de unidades formadoras de colonias (UFC)/ml para el diagnóstico y buscar variables que ayuden a sospechar de bacteriemia en lactantes menores de 3 meses con ITU. Métodos: Se revisaron fichas clínicas de lactantes menores de 3 meses hospitalizados por fiebre sin foco evidente, registrando edad, sexo, días de fiebre preconsulta, temperatura y gravedad al ingreso, diagnósticos de egreso, exámenes de laboratorio y tratamientos. Según diagnóstico de egreso, se separaron en ITU (-) y (+), con o sin bacteriemia. Resultados: Ingresaron 467 lactantes: 334 con ITU y 133 sin ITU. En ITU (+), la sensibilidad de la piuria fue de 95.8% y bacterias (+) 88.3%; la especificidad fue alta para nitritos (96.2%) y bacterias (+) (92.5%). El valor predictivo positivo (VPP) fue de 95.9% para nitritos, 96.7% para bacterias y 92.5% para piuria. Escherichia coli se encontró en el 83.8% de los urocultivos (UC) (+) y en el 87% de los hemocultivos (+). Las ITU con bacteriemia presentaron elementos inflamatorios, UC con ≥ 100,000 UFC/ml y mayor porcentaje de proteína C reactiva (PCR) > 50 mg/l (p= 0.002); el 94.6% de los UC (+) tuvo ≥ 50,000 UFC/ml. Conclusiones: La piuria y bacterias (+) en el AO son excelentes para pronosticar ITU en orina obtenida con sonda vesical y el punto de corte para el diagnóstico debe ser ≥ 50,000 UFC/ml. No encontramos señales que ayudaran a sospechar ITU con bacteriemia.

A Non-Classical Presentation of Oral Pyogenic Granuloma with Actinomycosis

Introduction: Pyogenic granuloma is a rather confusing reactive lesion of the oral mucosa, considering it is neither a bacterial infection nor does it produce any pus. In fact, even histologically, there is no formation of granulomas to substantiate the name. Intraoral actinomycosis is another interesting lesion due to its unique ability to masquerade itself as a swelling, abscess, or even a neoplasm. The occurrence of the two lesions separately is common in the oral cavity, however, their co-existence is extremely rare. Case Presentation: A 65-year-old female patient was referred from a private dental clinic with the chief complaint of a growth on her left posterior region of mouth, at the occlusal level of 15, 18 tooth regions for past 1 month. Conclusion: Clinicians should be aware about the occurrence of such rare combination of intraoral lesions, in order to make an accurate diagnosis and in turn, tailor a correct treatment protocol for these patients.

Mortalidad en adultos con COVID-19: experiencia de la Unidad de Cuidados Intensivos de un Hospital de Tercer Nivel de Paraguay

Introducción: diversos factores pueden influir en la mortalidad de pacientes hospitalizados por COVID-19. Objetivo: determinar la mortalidad y los factores asociados a esta en adultos con COVID-19 hospitalizados en la unidad de cuidados intensivos de un Hospital de Tercer Nivel de Paraguay. Metodología: estudio observacional, descriptivo, de asociación cruzada, de corte transversal y temporalmente retrospectivo. Se incluyó historias clínicas de pacientes adultos, de ambos sexos, que tenían diagnóstico confirmado (por prueba de antígeno y/o PCR) de infección por SARS-CoV-2 y que estaban hospitalizados en la unidad de cuidados intensivos de un Hospital General de Tercer Nivel de Paraguay. Resultados: Se incluyeron 116 pacientes, de los cuales el 54 % correspondió al sexo masculino. La edad media fue de 57±12,9 años. El 51 % tenía hipertensión arterial y el 29 % diabetes mellitus. El requerimiento de ventilación mecánica se dio en un 85% de pacientes. El 75 % de los pacientes ventilados tuvo un desenlace fatal. Se encontró una asociación estadísticamente significativa entre la presencia de infecciones bacterianas y requerimiento de hemodiálisis y el desenlace fatal (p=0,0074 y p=0,00011, respectivamente). La media de las edades de los pacientes fallecidos fue de 59,5 años, mientras que el grupo de pacientes que recibieron el alta desde la unidad de cuidados intensivos arrojó una media de 54,2 años. La diferencia entre estas edades en relación con el óbito fue significativa, con una p<0,05. Discusión: La mortalidad general debido a COVID-19 fue de más de 6 por cada 10 pacientes, siendo más alta en aquellos pacientes con ventilación. Aquellos pacientes que presentaron sobreinfección bacteriana o requirieron de hemodiálisis durante el curso de la hospitalización presentaron un peor desenlace en comparación con los pacientes que no presentaron este tipo de complicaciones.

Introduction: Several factors may influence mortality in patients hospitalized with COVID-19. Objective: This research aimed to determine mortality and associated factors in adults with COVID-19 hospitalized in the intensive care unit of a Third Level Hospital in Paraguay. Methodology: Observational, descriptive of cross-association, cross-sectional, and retrospective study. We included medical records of adult patients, of both sexes, who had a confirmed diagnosis (by antigen and/or PCR test) of SARS-CoV-2 infection and who were hospitalized in the intensive care unit of a Third Level General Hospital in Paraguay. Results: We included 116 patients, 54% of whom were male. The mean age was 57 ± 12.9 years. Of participants, 51% had hypertension and 29% diabetes mellitus. Mechanical ventilation was required in 85% of the patients. Of ventilated patients, 75% had a fatal outcome. A statistically significant association was found between the presence of bacterial infections and hemodialysis requirement and fatal outcome (p=0.0074 and p=0.00011, respectively). The mean age of the deceased patients was 59.5 years, while the group of patients discharged from the intensive care unit had a mean age of 54.2 years. The difference between these ages in relation to death was significant, with a p<0.05. Discussion: Overall mortality due to COVID-19 was more than 6 per 10 patients, being higher in those patients with ventilation. Those patients who presented bacterial superinfection or required hemodialysis during hospitalization had a worse outcome compared to patients who did not present this type of complications.

Management of mesh infection after tension-free repair of inguinal hernia / 中华普通外科杂志

Objective:To investigate the characteristics and surgical management of mesh infection after tension-free repair of inguinal hernia.Methods:The clinical and follow-up data of 87 patients with mesh infection after tension-free repair of inguinal hernia at the Department of Hernia and Abdominal Wall Surgery,Beijing Chaoyang Hospital from 2018 to 2020 were retrospectively analyzed.Results:The most frequent type of repair was plug implantation, accounting for 57.5% of the procedures. The most common clinical presentation was a chronic sinus. 79.3% patients had a >3-month history of chronic infection. Staphylococcus aureus was the most common bacteria. All patients underwent open debridement. Fifty-one patients had a complete removal of the infected mesh, and 36 had partial removal. All patients were followed up for 18.7-54.2 months. There was no significant difference in the incidence of wound infection, seroma, hematoma, inguinal hernia recurrence, and chronic pain between those with complete removal and that partial removal (all P>0.05). Seventeen cases suffered recurrent sinus in the partial mesh removal group, and the incidence was significantly higher than that in the complete mesh removal group ( P<0.001). Conclusion:Infected mesh removal is an effective treatment for mesh infection after tension-free repair of inguinal hernia and should be removed as completely as possible.

Clinical characteristics and risk factors of poor prognosis in patients with infected pancreatic necrosis caused by multidrug-resistant bacteria / 中华肝胆外科杂志

Objective:To study the clinical features and risk factors of death in patients with infected pancreatic necrosis (IPN) caused by multidrug-resistant bacteria (MDRB).Methods:The clinical data of 219 IPN patients who were managed at the Department of General Surgery of Xuanwu Hospital, Capital Medical University from January 1, 2016 to December 31, 2021 were retrospectively analyzed. There were 142 males, and 77 females, with a median age [ M( Q1, Q3)] of 51(38, 62) years old. Based on the pre-sence or absence of MDRB infection, these patients were divided into the MDRB-infected group ( n=117) and the non-MDRB-infected group ( n=102). Clinical features and outcomes were compared between the two groups, and the risk factors resulting in death in patients with MDRB infection were analyzed. Logistic regression analysis was used to determine the risk factors for poor outcomes in patients with MDRB. Results:There were significant differences in etiologies, distribution characteristics of necrosis and degrees of pancreatic necrosis between the two groups (all P<0.05). When compared with the non-MDRB-infected group, the CT severity index, the levels of procalcitonin and interleukin-6 were significantly higher in the MDRB group on admission, while the hematocrit was significantly lower (all P<0.05). Furthermore, when compared with the non-MDRB infection group, patients with MDRB infection were significantly more likely to have fungal infections [37.6%(44/117) vs. 21.6%(22/102)] and extrapancial infections [75.2%(88/117) vs. 58.8%(60/102)], more patients underwent surgery [89.7%(105/117) vs. 67.6%(69/102)], and more surgical procedures were performed [3(2, 4) times vs. 2(1, 3) times], with a higher incidence of postoperative complications [36.2%(38/117) vs. 18.8%(13/102)], an increase in a new-onset organ failure after surgery [37.1%(39/117) vs. 21.7%(15/102)], a higher in-hospital mortality rate [25.6%(30/117) vs. 10.8%(11/102)], longer hospitalization [39(28, 67) d vs. 29(18, 35) d] and ICU stays [22(10, 42) d vs. 11(6, 18) d], and a longer need for parenteral nutrition [19(9, 37) d vs. 15(7, 25) d, all P<0.05]. On multivariate regression analysis, the risk factor for death in the MDRB-infected group was co-fungal infection ( OR=1.199, 95% CI: 1.025-1.402). On the other hand, receiving therapy containing tigacycline ( OR=0.831, 95% CI: 0.715-0.965) and minimally invasive surgery ( OR=0.698, 95% CI: 0.562-0.868) reduced the risk of death in the MDRB-infected group (all P<0.05). Conclusions:IPN patients with MDRB infection had higher levels of inflammation, more serious pancreatic necrosis, longer treatment time, and increased need for surgical treatment. Measures involving fungal infection control and the use of tigacyclin and minimally invasive surgery reduced the risks of death in patients with MDRB infection.

Efficacy of implant surface culture in identification of microorganisms for fracture device-related infection: a preliminary analysis / 中华创伤骨科杂志

Objective:To evaluate the efficacy of implant surface culture in identification of pathogens for fracture device-related infection.Methods:A prospective study was conducted to include the eligible patients who were diagnosed with infection after fracture fixation and needed surgical removal of the implants according to treatment principles at Division of Orthopaedics and Traumatology, Department of Orthopaedics and Traumatology, Nanfang Hospital from November 2020 to January 2023. With informed consent, after rinsing with aseptic normal saline twice, their implants were gently covered with a thin layer of tryptone soy agar medium. Thereafter, the implants were incubated at 37 ℃ with 5% CO 2. Changes on the surface and in the surroundings of the implants were observed every day for consecutive 2 weeks to avoid drying up by supplementing the medium when necessary. Once pathogen colonies formed, samples were collected at 3 independent sites using sterile swabs for laboratory identification. Comparisons were made between the samples from implant surface culture and the intraoperative multisite samples from conventional culture. Results:Included were a total of 75 patients [56 males and 19 females with an age of (46.2±15.4) years]. The most common infection site was the tibia (37 cases), and the most common type of implants was plate and screw (59 cases). The positive rate of implant surface culture was significantly higher than that of conventional culture (86.7% vs. 52.0%, P<0.001). 80.5% (29/36) of the negative patients detected by the conventional culture obtained positive results by the implant surface culture; three of the positive patients detected by the conventional culture obtained negative results by the implant surface culture. The culture results were positive by both culture methods in 36 patients, and consistent by both culture methods in 35 patients, yielding a consistent rate of 97.2% (35/36). The time for implant surface culture was significantly shorter than that for conventional culture [1 (1, 2) d versus 3 (3, 4) d] ( P<0.001). Of the 65 positive patients by the implant surface culture, 59 were detected with monomicrobial infection, with Staphylococcus aureus on the top (29 cases). Conclusion:As the implant surface culture, a novel method, may be superior to the conventional culture in a significantly higher positive rate and a shorter culture time, it may be used as an effective adjunct to the conventional culture in identification of pathogens for fracture device-related infection.

Development and evaluation of a mortality risk prediction model for severe bacterial infections in children / 中华急诊医学杂志

Objective:To establish a mortality risk prediction model of severe bacterial infection in children and compare it with the pediatric early warning score (PEWS), pediatric critical illness score (PCIS) and pediatric risk of mortality score Ⅲ (PRISM Ⅲ).Methods:A total of 178 critically ill children were selected from the PICU of the Children's Hospital of Nanjing Medical University from May 2017 to June 2022. After obtaining the informed consent of the parents/guardians, basic information such as sex, age, height and weight, as well as indicators such as heart rate, systolic blood pressure and respiratory rate were collected from all children. A standard questionnaire was used to score the child 24 h after admission to the PICU. The children were divided into the survival and death groups according to their survival status at 28 d after admission. A mortality risk prediction model was constructed and nomogram was drawn. The value of the mortality risk prediction model, PEWS, PCIS and PRISM in predicting the risk of death was assessed and compared using the receiver operating characteristic (ROC) curve and the area under the ROC curve (AUC).Results:Among the 178 critically ill children, 11 cases were excluded due to severe data deficiencies and hospitalization not exceeding 24 h. A total of 167 children were included in the analysis, including 134 in the survival group and 33 in the death group. A mortality risk prediction model for children with severe bacterial infection was constructed using pupillary changes, state of consciousness, skin color, mechanical ventilation, total cholesterol and prothrombin time. ROC curve analysis showed that the AUCs of mortality risk prediction model was 0.888 ( P<0.05). The AUCs of PEWS, PCIS and PRISM Ⅲ in predicting death in children with severe bacterial infection were 0.769 ( P< 0.05), 0.575 ( P< 0.05) and 0.759 ( P< 0.05), respectively. Hosmer-Lemeshow goodness-of-fit test showed the best agreement between risk of death and PEWS predicted morbidity and mortality and actual morbidity and mortality (χ 2 = 5.180, P = 0.738; χ 2 = 4.939, P = 0.764), and the PCIS and PRISM Ⅲ predicted mortality rates fitted reasonably well with actual mortality rates (χ 2= 9.110, P= 0333; χ 2 = 8.943, P= 0.347). Conclusions:The mortality risk prediction model for predicting the death risk has better prognostic value than PEWS, PCIS and PRISM Ⅲ for children with severe bacterial infection.

Discovery and druggability evaluation of pyrrolamide-type GyrB/ParE inhibitor against drug-resistant bacterial infection

The bacterial ATP-competitive GyrB/ParE subunits of type II topoisomerase are important anti-bacterial targets to treat super drug-resistant bacterial infections. Herein we discovered novel pyrrolamide-type GyrB/ParE inhibitors based on the structural modifications of the candidate AZD5099 that was withdrawn from the clinical trials due to safety liabilities such as mitochondrial toxicity. The hydroxyisopropyl pyridazine compound 28 had a significant inhibitory effect on Gyrase (GyrB, IC50 = 49 nmol/L) and a modest inhibitory effect on Topo IV (ParE, IC50 = 1.513 μmol/L) of Staphylococcus aureus. It also had significant antibacterial activities on susceptible and resistant Gram-positive bacteria with a minimum inhibitory concentration (MIC) of less than 0.03 μg/mL, which showed a time-dependent bactericidal effect and low frequencies of spontaneous resistance against S. aureus. Compound 28 had better protective effects than the positive control drugs such as DS-2969 ( 5) and AZD5099 ( 6) in mouse models of sepsis induced by methicillin-resistant Staphylococcus aureus (MRSA) infection. It also showed better bactericidal activities than clinically used vancomycin in the mouse thigh MRSA infection models. Moreover, compound 28 has much lower mitochondrial toxicity than AZD5099 ( 6) as well as excellent therapeutic indexes and pharmacokinetic properties. At present, compound 28 has been evaluated as a pre-clinical drug candidate for the treatment of drug-resistant Gram-positive bacterial infection. On the other hand, compound 28 also has good inhibitory activities against stubborn Gram-negative bacteria such as Escherichia coli (MIC = 1 μg/mL), which is comparable with the most potent pyrrolamide-type GyrB/ParE inhibitors reported recently. In addition, the structure-activity relationships of the compounds were also studied.

Application and mechanism of nanomedicine and nanomaterials in antibacterial infection therapy / 药学学报

Antibacterial therapy is a global health issue. The antibiotic resistance is becoming an increasingly serious threat, which caused by misuse and overuse of antibacterial agents combined with the emergence of new resistance mechanism. The resulting infection treatment risk and incidence of the spread of disease, severe cases and deaths are increased in different degrees. With the extensive application of biomaterials and nanotechnology to biomedicine, extensive research has been conducted on antibacterial infection. With the specific physicochemical properties like optical, electric and magnetic and high penetration, inorganic nanomaterials can produce natural antibacterial effect. Nanomedicine can be designed to allow controlled drug release and targeting effect, thus demonstrated better antibacterial efficiency. In this review, the mechanism of antibacterial resistance is described, and the antibacterial infection research on inorganic nanomaterials, as well as nano-drug delivery system including liposomes, nanoparticles, dendrimers and biomimetic nanocarriers are summarized. Nanomaterials and nanotechnology offer promising strategies for the development of new agents that can improve efficacy on antibacterial infections and overcome antibiotic resistance potentially.

Cloning of adipor1 and adipor2 genes in Rana dybowskii and its expression pattern upon infection / 生物工程学报

Adiponectin receptor 1 (AdipoR1) and Adiponectin receptor 2 (AdipoR2) can bind to adiponectin (AdipoQ) secreted by adipose tissue to participate in various physiological functions of the body. In order to explore the role of AdipoR1 and AdipoR2 in amphibians infected by Aeromonas hydrophila (Ah), the genes adipor1 and adipor2 of Rana dybowskii were cloned by reverse transcription-polymerase chain reaction (RT-PCR) and analyzed by bioinformatics. The tissue expression difference of adipor1 and adipor2 was analyzed by real-time fluorescence quantitative polymerase chain reaction (qRT-PCR), and an inflammatory model of R. dybowskii infected by Ah was constructed. The histopathological changes were observed by hematoxylin-eosin staining (HE staining); the expression profiles of adipor1 and adipor2 after infection were dynamically detected by qRT-PCR and Western blotting. The results show that AdipoR1 and AdipoR2 are cell membrane proteins with seven transmembrane domains. Phylogenetic tree also shows that AdipoR1 and AdipoR2 cluster with the amphibians in the same branch. qRT-PCR and Western blotting results show that adipor1 and adipor2 were up-regulated at different levels of transcription and translation upon Ah infection, but the response time and level were different. It is speculated that AdipoR1 and AdipoR2 participate in the process of bacterial immune response, providing a basis for further exploring the biological functions of AdipoR1 and AdipoR2 in amphibians.

The pharmaceutical care of a multidrug-resistant bacterial infection patient with tigecycline-induced hypofibri-nogenemia / 中国药房

OBJECTIVE To provide reference for pharmaceutical care of multidrug-resistant bacterial infection patients with tigecycline-induced hypofibrinogenemia and the safe use of tigecycline. METHODS Clinical pharmacists participated in a case of hypofibrinogenemia caused by tigecycline with multidrug-resistant bacterial infection， to determine the correlation of hypofibrinogenemia and tigecycline， and to analyze the risk factors and possible mechanisms of the occurrence of hypofibrinogenemia caused by tigecycline in combination with relevant literature. Clinical pharmacists recommended that physicians discontinued tigecycline and provided human fibrinogen and plasma for correction. RESULTS & CONCLUSIONS Tigecycline was associated with hypofibrinogenemia of the patient. The physician followed the advice of clinical pharmacists and the patient’s fibrinogen level returned to normal. The risk factors of hypofibrinogenemia induced by tigecycline included high dose， long course of treatment， and complication with renal dysfunction. Clinical pharmacists should timely advise physicians to stop taking the drug， and give human fibrinogen and blood product infusion for correction when necessary， so as to avoid the occurrence of serious life- threatening coagulation disorders and ensure the safety of tigecycline use.

Near-infrared excited graphene oxide/silver nitrate/chitosan coating for improving antibacterial properties of titanium implants / 中国修复重建外科杂志

OBJECTIVE@#To design and construct a graphene oxide (GO)/silver nitrate (Ag3PO4)/chitosan (CS) composite coating for rapidly killing bacteria and preventing postoperative infection in implant surgery.@*METHODS@#GO/Ag3PO4 composites were prepared by ion exchange method, and CS and GO/Ag3PO4 composites were deposited on medical titanium (Ti) sheets successively. The morphology, physical image, photothermal and photocatalytic ability, antibacterial ability, and adhesion to the matrix of the materials were characterized.@*RESULTS@#The GO/Ag3PO4 composites were successfully prepared by ion exchange method and the heterogeneous structure of GO/Ag3PO4 was proved by morphology phase test. The heterogeneous structure formed by Ag3PO4 and GO reduced the band gap from 1.79 eV to 1.39 eV which could be excited by 808 nm near-infrared light. The photothermal and photocatalytic experiments proved that the GO/Ag3PO4/CS coating had excellent photothermal and photodynamic properties. In vitro antibacterial experiments showed that the antibacterial rate of the GO/Ag3PO4/CS composite coating against Staphylococcus aureus reached 99.81% after 20 minutes irradiation with 808 nm near-infrared light. At the same time, the composite coating had excellent light stability, which could provide stable and sustained antibacterial effect.@*CONCLUSION@#GO/Ag3PO4/CS coating can be excited by 808 nm near infrared light to produce reactive oxygen species, which has excellent antibacterial activity under light.

High-frequency devices effect in vitro: promissing approach in the treatment of acne vulgaris?

Abstract Background: Acne vulgaris is an inflammatory skin disorder leading to an impairment of quality of life and is therefore not only a cosmetic issue. Its pathogenesis is multifactorial - of particular importance is the colonization with the bacterium Propionibacterium acnes. A wide range of different treatment options exists including topical and systemic treatments depending on severity. High Frequency (HF) therapy, historically developed in the 19th century, claims antimicrobial effects on acne skin, but solid data on its efficacy and mechanism of action is lacking. Objective: The main objective of this study was to determine the efficacy of HF therapy on skin flora and P. acnes in vitro using a commercial device as well as to review studies on the mechanism of action. Methods: The plasma source was investigated regarding electrical settings, heat, and ozone development. Bacterial skin flora, fungal isolates, and P. acnes were exposed to HF in vitro and compared to unexposed controls by evaluating the number of colonies on agar plates. To further analyze bacterial species from normal skin flora, 16S-sequencing was performed. Statistical analyses were carried out using row analysis and unpaired t-test. Results: HF treatment led to a significant reduction of almost every bacterial and fungal species investigated in this study. Moreover, the number of colonies forming units was significantly decreased in P. acnes after HF treatment compared to controls in vitro. Study limitations: The experiments were performed in vitro only. To assess clinical effects further in vivo experiments are necessary. Conclusions: The results collected in this study, although in vitro, provide a mechanistic basis for HF as a complementary treatment option for patients with acne. It might also have a beneficial effect on patients with superficial infectious skin of the skin.

Resistencia antibiótica de Helicobacter pylori en la población peruana: una revisión sistemática y metaanálisis sobre su prevalencia en la población general

La infección por Helicobacter pylori es bastante común a nivel mundial, y tiene asociación con el adenocarcinoma gástrico. Las altas tasas de resistencia encontradas en países latinoamericanos justifican la investigación de tasas de resistencia local, lo que podría mejorar el enfoque terapéutico y las tasas de erradicación. El objetivo es evaluar la prevalencia de la resistencia de Helicobacter pylori a los antibióticos de uso común en Perú. Se incluyeron todos los estudios en población peruana que revelaron tasas de resistencia antibiótica de Helicobacter pylori. Se realizó una búsqueda sistemática de la literatura hasta enero del 2021, utilizando PubMed y otras bases de datos. Para el grupo de estudios de pacientes con punto de corte EUCAST, la resistencia fue la siguiente: Amoxicilina 14% (IC 95%: 6-25), Claritromicina 43% (IC 95%: 30-57), Metronidazol 58% (IC 95%: 22-90) y Quinolonas 51% (IC 95%: 38-64). Para el grupo de estudios de muestras con punto de corte EUCAST, los siguientes: Amoxicilina 57% (IC del 95%: 51-63), Claritromicina 35% (IC 95% 30-41), Metronidazol 67% (IC 95%: 62-72) y Tetraciclina 4% (IC 95%: 2-7). Se encontró una alta resistencia antibiótica de Helicobacter pylori en la mayoría de los grupos estudiados, aunque con heterogeneidad entre los estudios. La tasa de resistencia a tetraciclinas fue baja y los estudios mostraron ser homogéneos.

Helicobacter pylori infection is quite common worldwide and is associated with gastric adenocarcinoma. The high rates of resistance found in Latin American countries justify the investigation of local resistance rates, which could improve the therapeutic approach and eradication rates. The objective is to evaluate the prevalence of resistance in Peru of Helicobacter pylori to commonly used antibiotics. All studies in the Peruvian population that revealed rates of antibiotic resistance of Helicobacter pylori were included. A systematic literature search was conducted up to January 2021, using PubMed and other databases. For the group of patient studies with the EUCAST cut-off point, the resistance was as follows: Amoxicillin 14% (95% CI: 6-25), Clarithromycin 43% (95% CI: 30-57), Metronidazole 58% (95% CI: 22-90) and 51% Quinolones (95% CI: 38-64). For the EUCAST cut-off group of sample studies, the following: Amoxicillin 57% (95% CI: 51-63), Clarithromycin 35% (95% CI 30-41), Metronidazole 67% (95% CI: 62-72) and 4% Tetracycline (95% CI: 2-7). A high antibiotic resistance of Helicobacter pylori was found in most of the groups studied, although with heterogeneity between the studies. The rate of resistance to tetracyclines was low and the studies were shown to be homogeneous.

Anti pathogenic studies of new mixed ligand metal chelates

Drug discovery aimed at the methodical extermination of life-threatening bacterial infection, especially considering the emergence of multi-drug resistance of pathogenic bacteria has remained a challenge for medicinal inorganic chemistry. In this article, the mixed ligand complexes of Cu (II), Co (II), and Ni (II) containing heterocyclic ligands were synthesized and characterized by IR, LC-MS, UV, and TG-DTA. Complexes are screened for Anti-microbial activity against human pathogenic bacteria.

External fixation combined with Prontosan management for open fractures complicated with multidrug-resistant bacterial infection / 中华创伤骨科杂志

Objective:To access the efficacy of external fixation combined with Prontosan management for open fractures complicated with multidrug-resistant bacterial infection.Methods:A retrospective analysis was conducted of the data of 22 patients with open fracture complicated by multidrug-resistant bacterial infection who had been admitted to Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University from January 2015 to January 2020. According to whether the Prontosan management was used or not, the patients were divided into 2 groups.The Protosan group [9 males and 3 females with an age of (44.6±13.1) years] were subjected to external fixation, vacuum sealing drainage(VSD) or conventional dressing changes, and at the same time Protosan management to flush the wound or Prontosan gel to change dressings.The control group[6 males and 4 females with an age of (45.1±11.7) years] were subjected to external fixation plus VSD or conventional dressing changes. Skin flaps or skin grafts were used to repair the wound immediately after the wound infection was controlled in both groups. The time for negative culture of the bacteria on the wound surface, number of debridement, survival of the skinflaps or grafts, and fracture union were recorded and compared between the 2 groups.Results:There was no significant difference in the preoperative general data between the 2 groups which were comparable( P>0.05).All patients were followed up for 10 to 24 months (mean, 14.5 months).In the Prontosan group, the number of debridement was 2.0 (2.0, 3.0) times, significantly fewer than that in the control group [4.0 (3.0, 4.0) times]; the time for negative bacterial culture (8.3±2.2) d, significantly shorter than that in the control group [(14.2±3.1) d]; the fracture union time (5.5±1.1) months, significantly shorter than that in the control group [(6.5 ±1.1) months]; the Samantha X-ray score at 6 months after operation 6.0 (5.0,6.0) points, significantly higher than that in the control group [5.2(4.5,5.5) points] (all P<0.05). Skin flaps or grafts survived in all the patients without any nonunion or chronic osteomyelitis. Conclusion:In the external fixation of open fractures complicated with multidrug-resistant bacterial infection, combination with Prontosan management can effectively control infection and promote granulation, early wound healing and fracture union.

Clinical features of severe adenovirus pneumonia with bacterial infection in children / 中国小儿急救医学

Objective:To analyze the clinical characteristics of severe adenovirus pneumonia with bacterial infection in children, so as to provide clinical evidences for early diagnosis and reliable treatment.Methods:A total of 72 pediatric cases with severe adenovirus pneumonia admitted to Pediatric Intensive Care Unit at the First People′s Hospital of Chenzhou from January 2018 to August 2019 were included.The clinical features, laboratory and imaging data, efficacy of the treatments and prognosis were investigated retrospectively.Patients were divided into with bacterial infection group and without bacterial infection group.The clinical characteristics were analyzed.Results:Among the 72 children, there were 54 males and 18 females, aging from 3 months to 5 years, including 37cases with bacterial infection and 35 cases without bacterial infection.Compared with the group without bacterial infection, the group with bacterial infection had longer heat duration and hospital stay [12.0 (10.0, 18.5) days vs.10.0 (9.0, 12.0) days; 6.0(4.0, 7.0) days vs.11.0(6.5, 16.0) days, P<0.05], the incidences of diarrhea and hepatomegaly were higher[35.1% (13/37) vs.14.3%(5/35); 45.9%(17/37)vs.8.6%(3/35), P<0.05], the proportion of five lobes involved in lung imaging was higher [91.8% (34/37) vs. 57.1%(20/35), P<0.05]. The incidences of complications with respiratory failure, hemophagocytic lymphohistiocytosis, and bronchiolitis obliterans in the group with bacterial infection were significantly higher than those of without bacterial infection group ( P<0.05). Conclusion:For children under 2 years old age with severe adenovirus pneumonia, there are prolonged high fever and extensive pulmonary lesions.We should be highly alert to the combination of bacterial infection and timely anti-infection therapy.Children with severe adenovirus pneumonia with bacterial infection have severe clinical manifestations and many complications with respiratory failure, hemophagocytic lymphohistiocytosis, and bronchiolitis obliterans.

Application and Prospect Analysis of Preparation Technology in Improving Antibacterial Activity of Traditional Chinese Medicine / 中国实验方剂学杂志

Pathogenic bacterial infection is one of the main clinical symptoms. Antibiotics are widely used in clinical practice to inhibit or kill the bacteria， fungi and other pathogenic microorganisms. However， with the massive use of antibiotics， drug-resistant strains continue to appear that make the antibacterial situation is becoming increasingly severe. Due to the advantages of multiple targets， multiple pathways and multiple components， traditional Chinese medicine （TCM） have gradually attracted more attention and were used in antibacterial treatment. However， some antimicrobial TCM have problems such as low solubility， poor stability， and low bioavailability. Improving and enhancing the antibacterial activity of TCM through preparation technology is one of the effective solutions. Based on this， two aspects of unilateral antibacterial TCM preparation technology and combination antibacterial preparation technology are introduced， including inclusion technology， nanotechnology， electrospinning， 3D printing and others. Distinctive features and specific application effects of these preparation technologies are explained firstly， and then their advantages and disadvantages are compared and analyzed. The review can be a useful reference for improving the antibacterial activity of TCM.

Research progress about photothermal nanomaterials with targeted antibacterial properties and their applications in wound healing / 生物医学工程学杂志

With the development of photothermal nanomaterials, photothermal therapy based on near-infrared light excitation shows great potential for the bacterial infected wound treatment. At the same time, in order to improve the photothermal antibacterial effect of wound infection and reduce the damage of high temperature and heat to healthy tissue, the targeted bacteria strategy has been gradually applied in wound photothermal therapy. In this paper, several commonly used photothermal nanomaterials as well as their targeted bacterial strategies were introduced, and then their applications in photothermal antibacterial therapy, especially in bacterial infected wounds were described. Besides, the challenges of targeted photothermal antibacterial therapy in the wound healing application were analyzed, and the development of photothermal materials with targeted antibacterial property has prospected in order to provide a new idea for wound photothermal therapy.

Lesions caused by human and domestic and wild animal bites

ABSTRACT Animal bites are a common problem in the emergency room. There are many reports of isolated cases (mainly of domestic mammals); however, texts with more comprehensive and general guidance on these kinds of bite injuries are necessary, including those caused by wild mammals, reptiles, and even fish. This review aims to update knowledge on this problem, which includes human and domestic and wild animal bites. Health teams in emergency care centers should be aware of the initial and late measures required to control this problem.