Risk factors for bacterial catheter colonization in regional anaesthesia

BACKGROUND: Although several potential risk factors have been discussed, risk factors associated with bacterial colonization or even infection of catheters used for regional anaesthesia are not very well investigated. METHODS: In this prospective observational trial, 198 catheters at several anatomical sites where placed using a standardized technique. The site of insertion was then monitored daily for signs of infection (secretion at the insertion site, redness, swelling, or local pain). The catheters were removed when clinically indicated (no or moderate postoperative pain) or when signs of potential infection occurred. After sterile removal they were prospectively analyzed for colonization, defined as > 15 colony forming units. RESULTS: 33 (16.7%) of all catheters were colonized, and 18 (9.1%) of these with additional signs of local inflammation. Two of these patients required antibiotic treatment due to superficial infections. Stepwise logistic regression analysis was used to identify factors associated with catheter colonization. Out of 26 potential factors, three came out as statistically significant. Catheter placement in the groin (odds-ratio and 95%-confidence interval: 3.4; 1.5–7.8), and repeated changing of the catheter dressing (odds-ratio: 2.1; 1.4–3.3 per removal) increased the risk for colonization, whereas systemic antibiotics administered postoperatively decreased it (odds ratio: 0.41; 0.12–1.0). CONCLUSION: Colonization of peripheral and epidural nerve catheter can only in part be predicted at the time of catheter insertion since two out of three relevant variables that significantly influence the risk can only be recorded postoperatively. Catheter localisation in the groin, removal of the dressing and omission of postoperative antibiotics were associated with, but were not necessarily causal for bacterial colonization. These factors might help to identify patients who are at increased risk for catheter colonization

Frequency of resistance to methicillin and other antimicrobial agents among Staphylococcus aureus strains isolated from pigs and their human handlers in Trinidad

Background: Methicillin-resistant Staphylococcus aureus (MRSA) has emerged recently worldwide in production animals, particularly pigs and veal calves, which act as reservoirs for MRSA strains for human infection. The study determined the prevalence of MRSA and other resistant strains of S. aureus isolated from the anterior nares of pigs and human handlers on pig farms in Trinidad. Methods: Isolation of S. aureus was done by concurrently inoculating Baird-Parker agar (BPA) and Chromagar MRSA (CHROM) with swab samples and isolates were identified using standard methods. Suspect MRSA isolates from Chromagar and BPA were subjected to confirmatory test using Oxoid PBP2 latex agglutination test. The disc diffusion method was used to determine resistance to antimicrobial agents. Results: The frequency of isolation of MRSA was 2.1% (15 of 723) for pigs but 0.0% (0 of 72) for humans. Generally, for isolates of S. aureus from humans there was a high frequency of resistance compared with those from pigs, which had moderate resistance to the following antimicrobials: penicillin G (54.5%, 51.5%), ampicillin (59.1%, 49.5%), and streptomycin (59.1%, 37.1%), respectively. There was moderate resistance to tetracycline (36.4%, 41.2%) and gentamycin (27.2%, 23.7%) for human and pig S. aureus isolates, respectively, and low resistance to sulfamethoxazole-trimethoprim (4.5%, 6.2%) and norfloxacin (9.1%, 12.4%), respectively. The frequency of resistance to oxacillin by the disc method was 36.4 and 34.0% from S. aureus isolates from humans and pigs, respectively. Out of a total of 78 isolates of S. aureus from both human and pig sources that were resistant to oxacillin by the disc diffusion method, only 15 (19.2%) were confirmed as MRSA by the PBP'2 latex test kit. Conclusions: The detection of MRSA strains in pigs, albeit at a low frequency, coupled with a high frequency of resistance to commonly used antimicrobial agents in pig and humans could have zoonotic and therapeutic implications. Finally, the diagnostic limitation of using CHROMagar and testing for oxacillin resistance by the disc diffusion method alone to determine MRSA strains without performing confirmatory tests cannot be overemphasized because the possibility of overdiagnosis of MRSA infections cannot be ignored

Tuberculosis among people living with HIV/AIDS in the German ClinSurv HIV Cohort: long-term incidence and risk factors

BACKGROUND: Tuberculosis (TB) still presents a leading cause of morbidity and mortality among people living with HIV/AIDS (PLWHA), including those on antiretroviral therapy. In this study, we aimed to determine the long-term incidence density rate (IDR) of TB and risk factors among PLWHA in relation to combination antiretroviral therapy (cART)-status. METHODS: Data of PLWHA enrolled from 2001 through 2011 in the German ClinSurv HIV Cohort were investigated using survival analysis and Cox regression. RESULTS: TB was diagnosed in 233/11,693 PLWHA either at enrollment (N = 62) or during follow-up (N = 171). The TB IDR during follow-up was 0.37 cases per 100 person-years (PY) overall [95% CI, 0.32-0.43], and was higher among patients who never started cART and among patients originating from Sub-Saharan Africa (1.23 and 1.20 per 100PY, respectively). In two multivariable analyses, both patients (I) who never started cART and (II) those on cART shared the same risk factors for TB, namely: originating from Sub-Saharan Africa compared to Germany (I, hazard ratio (HR); [95% CI]) 4.05; [1.87-8.78] and II, HR 5.15 [2.76-9.60], CD4+ cell count <200 cells/μl (I, HR 8.22 [4.36-15.51] and II, HR 1.90 [1.14-3.15]) and viral load >5 log(10) copies/ml (I, HR 2.51 [1.33-4.75] and II, HR 1.77 [1.11-2.82]). Gender, age or HIV-transmission risk group were not independently associated with TB. CONCLUSION: In the German ClinSurv HIV cohort, patients originating from Sub-Saharan Africa, with low CD4+ cell count or high viral load at enrollment were at increased risk of TB even after cART initiation. As patients might be latently infected with Mycobacterium tuberculosis complex, early screening for latent TB infection and implementing isoniazid preventive therapy in line with available recommendations is crucial

Constructing a Social Accounting Matrix for Libya and Using it to Conduct Policy Experiments with a Computable General Equilibrium Model

EThOS - Electronic Theses Online ServiceGBUnited Kingdo

A Klebsiella pneumoniae liver abscess with endophthalmitis in a diabetic man with gallstones

Invasive liver abscess syndrome (ILAS) is caused by Klebsiella pneumoniae and is typically seen in people from East Asia, often with diabetes and gallstones. ILAS includes metastatic sequalae of the infection, commonly to the eyes. The case described below occurred in a London hospital. The patient’s abscess was diagnosed on CT and MRI imaging and he developed endophthalmitis secondary to metastatic spread of the infection. He was treated with intravenous and intravitreal antibiotics and discharged with a plan for vitrectomy and cholecystectomy as an outpatient. We discuss the epidemiology, risk factors, pathogenesis, prognosis and management of this rare condition. There have been a number of recent reports of cases of this nature outside of Asia and we believe greater awareness is required. A high index of suspicion should be held for the potential development of metastases in patients of this demographic presenting with abscesses of this nature

The status of ward-based clinical education: the medical students&rsquo; opinion

Farzana Begum,1 Farah Jaffar,1 Doa&rsquo;a Kerwat,1 Salma Marouf,1 Hiral Rana,1 Yasir Ashraf,2 Bassit Malik,2 1Barts and the London School of Medicine and Dentistry, 2School of Medicine, Imperial College London, London, UK&nbsp;We read with great interest the article by Jones and Rai,1 which researched the views of medical students toward bedside teaching. Students from only four UK medical schools were surveyed and the findings lacked qualitative feedback; hence, as fifth year medical students from Barts and the London School of Medicine and Dentistry and Imperial College London, we express our views on bedside teaching and other resources of clinical education.&nbsp;&nbsp;View the original paper by&nbsp;Jones and Rai.&nbsp

Going beyond the situational judgment test: the true impact of the educational performance measure, publications, and extra-degree performance on the foundation program application

Meelad Sayma,1,2 Shiraz Jamshaid,1 Doa&#39;a Kerwat,1,3 Dina Saleh,1 Aaniya Ahmed,1 Folashade Oyewole,1 Abdul Samad Wahid1 1 Imperial College Business School, Imperial College London, London, 2Peninsula College of Medicine and Dentistry, Plymouth, Devon, 3Barts and The London School of Medicine and Dentistry, London, UK&nbsp;We read with great interest the expert opinion of Singagireson et al and agree with the key points raised.1 However, this can be seen to be only one part of the multidimensional foundation program application. It is important to add that we feel there are multiple inequitable components that impact on UK medical students&rsquo; foundation program application. The author emphasizes that the situational judgment test (SJT) and medical school performance make up two points of the application performance; however, there are two factors that have a larger-than appreciated impact on the foundation program application &ndash; &ldquo;PubMed-referenced publications&rdquo; and additional degrees (eg, an intercalated BSc or PhD).2View original article by Singagireson et al &nbsp;&nbsp

A qualitative inquiry into the barriers and facilitators to achieving home death

OBJECTIVES: To explore the barriers and facilitators to patients achieving death at home. METHODS: In-depth, semistructured interviews with end-of-life care experts were conducted to develop an insight into the barriers and facilitators to achieving death at home. Thirty-three interviews were conducted compromising of a mixture of face-to-face and tele interviews. Experts included healthcare professionals working in the community, hospital and policy/academic settings. Thematic analysis was undertaken on interview transcripts. RESULTS: Three overarching themes, further divided into a total of 12 subthemes were identified. The three themes were 'managing people', 'education' and 'planning'. The 'managing people' theme included subthemes of patient preferences and family influences; the 'education' theme encompassed knowledge and training, perceptions of death and communication and the 'planning' theme contained seven subthemes including 'coordination', 'resources' and 'cost'. CONCLUSIONS: Multiple barriers and facilitators to achieving death at home were identified in this study. Of particular significance was the identification of the fear and stigma associated with death among doctors, patients and their families serving as a barrier to home death, not previously identified in the literature. Additionally, the importance of social networks and resource provision were highlighted as key in influencing patient death at home