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Medical microbiology

Carlo Luca Romanò, Delia Romanò, Ilaria Morelli, Lorenzo Drago
Biofilms have a tremendous impact on industrial machines working in moist environments, while in biological systems their effect is further complicated by the host's response.Implant-related infections are a complex process, starting with bacterial adhesion and biofilm formation, followed by the variable interaction between host, implant, microorganisms and their by-products. Depending on the balance of these factors, different clinical presentations are observed, which may eventually, at times, shift from one into the other...
October 19, 2016: Advances in Experimental Medicine and Biology
Frank Günther, Uta Merle, Uwe Frank, Matthias M Gaida, Nico T Mutters
BACKGROUND: Achromobacter xylosoxidans (AX) is known for intrinsic resistance to disinfectants. Our laboratory routine surveillance system detected an unexpected rise in AX bloodstream infections in a 2200-bed hospital. An epidemiological investigation was conducted to find the source and disrupt further transmission. METHODS: Outbreak cases were defined as patients with at least one positive blood culture positive for AX from May 2014 to May 2015. Medical records were reviewed, affected wards, as well as the microbiology laboratory were audited...
October 19, 2016: BMC Infectious Diseases
Sanka Amadoru, Kwang Lim, Mark Tacey, Craig Aboltins
AIMS: To explore differences in presentation and outcomes between younger and older patients with bacterial spinal infections. METHODS: Clinical, microbiological and radiological information was collected for patients at a single metropolitan hospital with spinal infections (spondylodiscitis, vertebral osteomyelitis, septic discitis, facet joint septic arthritis, and spinal epidural abscess) between January 2008 and January 2015. Patients were excluded if under 18 years of age, or if clinical and imaging findings were inconsistent with the diagnosis...
October 18, 2016: Internal Medicine Journal
Nouf Al Saleem, Khaled Al-Surimi
Frequent, preventable medical errors can have an adverse effect on patient safety and quality as well as leading to wasted resources. In the laboratory, errors can occur at any stage of sample processing; pre-analytical, analytical, and post analytical stages. However evidence shows most of the laboratory errors occur during the pre-analytical stage. The receipt and processing of specimens is one of the main steps in the pre-analytical stage. Errors in this stage could be due to mislabeling, incorrect test entry and entering the wrong location, among other reasons...
2016: BMJ Quality Improvement Reports
Adam W Bartlett, Ben Smith, C R Robert George, Brendan McMullan, Alison Kesson, Monica M Lahra, Dip Paed, Pamela Palasanthiran
BACKGROUND: Group B Streptococcus (GBS) is a recognized cause of sepsis and meningitis, particularly in infants. Early onset (<7 days) GBS disease has been well characterized, whereas the epidemiology of late onset disease (LOD, 7-89 days) and very late onset disease (VLOD, ≥90 days) is less well understood. The aims of this study were to assess risk factors, presentation, management, and outcome for GBS LOD and VLOD. METHODS: Microbiology laboratory databases and hospital diagnostic coding for Sydney Children's Hospital and the Children's Hospital at Westmead were investigated for patients ≥ 7 days of age diagnosed with GBS bloodstream infection or meningitis from 1st January 2000 to 31st December 2014 (15 years)...
October 3, 2016: Pediatric Infectious Disease Journal
Patrick J van der Geest, Mostafa Mohseni, Daan Nieboer, Servet Duran, A B Johan Groeneveld
OBJECTIVES: We aimed to study the safety and efficacy of PCT in guiding blood culture taking in critically ill patients with suspected infection. METHODS: We performed a cluster-randomized, multi-center, single-blinded, cross-over trial. Patients suspected of infection in whom taking blood for culture was indicated were included. The participating ICU's were stratified and randomized by treatment regimen into a control group and PCT-guided group. All patients included into this trial followed the regimen which was allocated to the ICU for that period...
October 13, 2016: Clinical Microbiology and Infection
M X Rodrigues, S F Lima, C H Higgins, S G Canniatti-Brazaca, R C Bicalho
The bacterium Lactococcus lactis is widely used in food production and in medical applications, and is considered safe for human and animal use. However, studies have also linked Lactococcus bacteria to infection. For example, certain variants of Lactococcus species have been associated with bovine mastitis (e.g., Lactococcus lactis and Lactococcus garvieae). In this study, we investigated an outbreak of bovine mastitis thought to be associated with Lactococcus bacteria by using microbiological and molecular techniques...
October 13, 2016: Journal of Dairy Science
H White, L Gillgrass, A Wood, D G Peckham
OBJECTIVES: To identify patient's views on the functionality required for personalised access to the secondary care electronic health record (EHR) and their priorities for development. DESIGN: Quantitative analysis of a cross-sectional self-complete survey of patient views on required EHR functionality from a secondary care EHR, including a patient ranking of functionality. SETTING: Secondary care patients attending a regional cystic fibrosis unit in the north of England...
October 14, 2016: BMJ Open
Robert W Aldridge, Dominik Zenner, Peter J White, Elizabeth J Williamson, Morris C Muzyamba, Poonam Dhavan, Davide Mosca, H Lucy Thomas, Maeve K Lalor, Ibrahim Abubakar, Andrew C Hayward
BACKGROUND: Tuberculosis elimination in countries with a low incidence of the disease necessitates multiple interventions, including innovations in migrant screening. We examined a cohort of migrants screened for tuberculosis before entry to England, Wales, and Northern Ireland and tracked the development of disease in this group after arrival. METHODS: As part of a pilot pre-entry screening programme for tuberculosis in 15 countries with a high incidence of the disease, the International Organization for Migration screened all applicants for UK visas aged 11 years or older who intended to stay for more than 6 months...
October 10, 2016: Lancet
Joseph D Forrester, Haiwei Henry Guo, Thomas G Weiser
BACKGROUND: Coccidioidomycosis, commonly called "valley fever," "San Joaquin fever," "desert fever," or "desert rheumatism," is a multi-system illness caused by infection with Coccidioides fungi (C. immitis or C. posadasii). This organism is endemic to the desert Southwest regions of the United States and Mexico and to parts of South America. The manifestations of infection occur along a spectrum from asymptomatic to mild self-limited fever to severe disseminated disease. METHODS: Review of the English-language literature...
October 14, 2016: Surgical Infections
A G Spruijt, K R Wilting, G D Mithoe, W J M Niessen
OBJECTIVE: To investigate the effect of an intervention in which medical-microbiological laboratories alert general practitioners (GPs) in writing about patients with a chronic hepatitis B or C infection in their practice, urging them to bring these patients under medical surveillance again now that treatment options have improved and guidelines have been revised. DESIGN: Descriptive, prospective. METHOD: All patients who had been diagnosed with hepatitis B or C between 2003 and 2013 on the request of the GP, and for whom diagnostics by an internist, infectious diseases specialist or gastrointestinal/liver specialist had never been requested, were included...
2016: Nederlands Tijdschrift Voor Geneeskunde
Chung-Jong Kim, Eun Jung Kim, Kyoung-Ho Song, Pyoeng Gyun Choe, Wan Beom Park, Ji Hwan Bang, Eu Suk Kim, Sang Won Park, Hong-Bin Kim, Myoung-Don Oh, Nam Joong Kim
BACKGROUND: Differences between the characteristics of culture positive pyogenic spondylitis (CPPS) and tuberculous spondylitis (TS) are well known. However, differences between the characteristics of culture negative pyogenic spondylitis (CNPS) and TS have not been reported; these would be more helpful in clinical practice especially when initial microbiologic examination of blood and/or biopsy tissue did not reveal the causative bacteria in patients with infectious spondylitis. METHODS: We performed a retrospective review of the medical records of patients with CNPS and TS...
October 12, 2016: BMC Infectious Diseases
Arnold L Demain, Evan Martens
We are pleased to dedicate this paper to Dr Julian E Davies. Julian is a giant among microbial biochemists. He began his professional career as an organic chemistry PhD student at Nottingham University, moved on to a postdoctoral fellowship at Columbia University, then became a lecturer at the University of Manchester, followed by a fellowship in microbial biochemistry at Harvard Medical School. In 1965, he studied genetics at the Pasteur Institute, and 2 years later joined the University of Wisconsin in the Department of Biochemistry...
October 12, 2016: Journal of Antibiotics
Sreekanth Raveendran, Dukhabandhu Naik, Samuel C Raj Pallapati, John Jude Prakash, Binu Prathap Thomas, Nihal Thomas
BACKGROUND: Pyogenic Infections of the hand in diabetes are largely a tropical entity and published material in the area are rather meagre. PATIENTS AND METHODS: This is a retrospective study on the pattern of hand infections and involves the microbiological profile of 39 cases of diabetes hand-related infections admitted to the hospital between the years 2004 and 2010. RESULTS: This study included 39 patients, among whom 23 (59%) had necrotizing fasciitis (NF), and 16 (9-abscess and 7-tenosynovitis) had nonnecrotizing infection...
September 2016: Indian Journal of Endocrinology and Metabolism
Winai Chaidaroon, Sumet Supalaset, Napaporn Tananuvat, Nongnuch Vanittanakom
PURPOSE: To report a rare case of keratitis infected by Bipolaris hawaiiensis. METHODS: A patient who was diagnosed as fungal keratitis caused by B. hawaiiensis was retrospectively reviewed for history, clinical characteristics, risk factors, laboratory findings, treatments, and outcomes. RESULTS: A 63-year-old man with a history of trauma and saw dust in the left eye presented with a corneal ulcer. Eye examination revealed whitish infiltration with a feathery edge and small brownish deposits in the anterior stroma of the left cornea...
May 2016: Case Reports in Ophthalmology
Laura Krogh Jørgensen, Lars Skov Dalgaard, Lars Jørgen Østergaard, Mette Nørgaard, Trine Hyrup Mogensen
OBJECTIVES: We aimed to investigate the incidence and mortality of herpes simplex encephalitis (HSE) in a nationwide cohort. METHODS: From the Danish National Patient Registry, we identified all adults hospitalised with a first-time diagnosis of HSE in Denmark during 2004-2014. The HSE diagnoses were verified using medical records and microbiological data. Patients were followed for mortality through the Danish Civil Registry System. We estimated age-standardised incidence rates of HSE and 30-day, 60-day, and 1-year cumulative mortality...
October 4, 2016: Journal of Infection
Oddvar Oppegaard, Steinar Skrede, Haima Mylvaganam, Bård Reiakvam Kittang
BACKGROUND: Beta-haemolytic streptococci are important contributors to the global burden of osteoarticular infections (OAI). Knowledge on the disease traits specific for streptococcal OAI, however, remains scarce. We wished to explore temporal trends of OAI caused by Group A Streptococci (GAS), Group B Streptococci (GBS) and Group C and G Streptococci (GCGS), and furthermore, to describe the associated host and pathogen characteristics. METHODS: All cases of microbiologically verified β-haemolytic streptococcal OAI in Health Region Bergen, Norway, in the period 1999-2013 were retrospectively identified...
October 4, 2016: BMC Infectious Diseases
E Yusuf, D S Y Ong, A Martin-Quiros, C Skevaki, J Cortez, K Dedić, A E Maraolo, D Dušek, P J Maver, M Sanguinetti, E Tacconelli
The purpose of this investigation was to perform a survey among European clinical microbiology (CM) and infectious disease (ID) trainees on training satisfaction, training tools, and competency assessment. An online, anonymous survey in the English language was carried out between April and July 2015. There were 25 questions: seven in a 5-point Likert scale (1: worst scenario, 5: best scenario) and the remainder as closed multiple-choice questions in five areas (satisfaction, adequacy, system, mentorship, and evaluation of training)...
October 4, 2016: European Journal of Clinical Microbiology & Infectious Diseases
Christiana Jesumirhewe, Peter Oladejo Ogunlowo, Mitsan Olley, Burkhard Springer, Franz Allerberger, Werner Ruppitsch
BACKGROUND: Enterobacteriaceae are ubiquitously present in nature and can be found in the intestinal tract of humans and animals as commensal flora. Multidrug-resistant Enterobacteriaceae are increasingly reported and are a threat to public health implicating a need for accurate identification of the isolates to species level. In developing countries, identification of bacteria basically depends on conventional methods: culture and phenotypic methods that hamper the accurate identification of bacteria...
2016: PeerJ
Jagdish Chander, Nidhi Singla, Mandeep Kaur, Rajpal Singh Punia, Ashok Attri, Ana Alastruey-Izquierdo, José F Cano-Lira, Alberto Miguel Stchigel, Josep Guarro
BACKGROUND: Saksenaea erythrospora is an emerging and recently described pathogenic fungus mainly causing invasive cutaneous infections. Globally, very few human cases, caused by S. erythrospora, have been reported. In India, among the genus Saksenaea, S. vasiformis was the only reported pathogenic species, until recently when a case of fungal rhinosinusitis was reported to be caused by S. erythrospora. We observed five human cases of necrotizing skin and soft tissue infections caused by S...
October 4, 2016: Infectious Diseases
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