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https://www.readbyqxmd.com/read/29219107/molecular-methods-for-detection-of-antimicrobial-resistance
#1
Muna F Anjum, Ea Zankari, Henrik Hasman
The increase in bacteria harboring antimicrobial resistance (AMR) is a global problem because there is a paucity of antibiotics available to treat multidrug-resistant bacterial infections in humans and animals. Detection of AMR present in bacteria that may pose a threat to veterinary and public health is routinely performed using standardized phenotypic methods. Molecular methods are often used in addition to phenotypic methods but are set to replace them in many laboratories due to the greater speed and accuracy they provide in detecting the underlying genetic mechanism(s) for AMR...
December 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/29214833/living-with-functionally-univentricular-heart-beating-the-odds
#2
Safak Alpat, Metin Demircin
An unoperated 45-year-old man with double-inlet single left ventricle, transposed great arteries, ventricular septal defect, and pulmonary stenosis presented with mitral and pulmonary valvular vegetations unresponsive to antibiotic therapy. The initial diagnosis was made with echocardiography, and the morphology was delineated with computed tomography and magnetic resonance imaging. The patient underwent mitral valve replacement with a mechanical valve and pulmonary valve vegetectomy. He recovered well and he is currently well two years after the operation...
January 1, 2017: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/29214694/myelodysplastic-syndromes-2018-update-on-diagnosis-risk-stratification-and-management
#3
Guillermo Montalban-Bravo, Guillermo Garcia-Manero
DISEASE OVERVIEW: The myelodysplastic syndromes (MDS) are a very heterogeneous group of myeloid disorders characterized by peripheral blood cytopenias and increased risk of transformation to acute myelogenous leukemia (AML). MDS occurs more frequently in older males and in individuals with prior exposure to cytotoxic therapy. DIAGNOSIS: Diagnosis of MDS is based on morphological evidence of dysplasia upon visual examination of a bone marrow aspirate and biopsy. Information obtained from additional studies such as karyotype, flow cytometry or molecular genetics is usually complementary and may help refine diagnosis...
January 2018: American Journal of Hematology
https://www.readbyqxmd.com/read/29210477/the-role-of-terminal-functionality-in-the-membrane-and-antibacterial-activity-of-peptaibol-mimetic-aib-foldamers
#4
Catherine Adam, Anna D Peters, Maria Giovanna Lizio, George F S Whitehead, Vincent Diemer, James A Cooper, Scott L Cockroft, Jonathan Clayden, Simon John Webb
Peptaibols are peptide antibiotics that typically feature an N-terminal acetyl cap, a C-terminal aminoalcohol, and a high proportion of α-aminoisobutyric acid (Aib) residues. To establish how each feature might affect the membrane-activity of peptaibols, biomimetic Aib foldamers with different lengths and terminal groups were synthesised. Vesicle assays showed that long foldamers (eleven Aib residues) with hydrophobic termini had the highest ionophoric activity. C-terminal acids or primary amides inhibited activity, while replacement of an N-terminal acetyl with an azide group made little difference...
December 6, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29208130/novel-large-scale-chromosomal-transfer-in-bacteroides-fragilis-contributes-to-its-pan-genome-and-rapid-environmental-adaptation
#5
Fasahath Husain, Kevin Tang, Yaligara Veeranagouda, Renata Boente, Sheila Patrick, Garry Blakely, Hannah M Wexler
Bacteroides fragilis, an important component of the human gastrointestinal microbiota, can cause lethal extra-intestinal infection upon escape from the gastrointestinal tract. We demonstrated transfer and recombination of large chromosomal segments from B. fragilis HMW615, a multidrug resistant clinical isolate, to B. fragilis 638R. In one example, the transfer of a segment of ~435 Kb/356 genes replaced ~413 Kb/326 genes of the B. fragilis 638R chromosome. In addition to transfer of antibiotic resistance genes, these transfers (1) replaced complete divergent polysaccharide biosynthesis loci; (2) replaced DNA inversion-controlled intergenic shufflons (that control expression of genes encoding starch utilization system outer membrane proteins) with more complex, divergent shufflons; and (3) introduced additional intergenic shufflons encoding divergent Type 1 restriction/modification systems...
November 2017: Microbial Genomics
https://www.readbyqxmd.com/read/29191714/subcutaneous-immunoglobulins-in-patients-with-multiple-myeloma-and-secondary-hypogammaglobulinemia
#6
Angelo Vacca, Carolina Marasco, Assunta Melaccio, Azzurra Sportelli, Ilaria Saltarella, Antonio Solimando, Franco Dammacco, Roberto Ria
Multiple myeloma is commonly associated with a reduction of non-paraprotein immunoglobulins, resulting in a higher risk of infections that represent the leading cause of the patients' death. Therefore, immunoglobulin replacement therapy appears a logical approach. A total number of 46 myeloma patients were enrolled: 24 of them were assigned to receive subcutaneous immunoglobulins, and 22 were controls. The primary endpoint was the evaluation of the annual rate of severe infections in immunoglobulins-receiving patients as compared with those untreated...
November 27, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/29191658/identification-and-target-modifications-of-temporin-pe-a-novel-antimicrobial-peptide-in-the-defensive-skin-secretions-of-the-edible-frog-pelophylax-kl-esculentus
#7
Mengru Sang, Qinan Wu, Xinping Xi, Chengbang Ma, Lei Wang, Mei Zhou, James F Burrows, Tianbao Chen
A potent natural antimicrobial peptide named temporin-PE was identified and encoded from the skin secretions of Pelophylax kl. esculentus via "shotgun" cloning and LC-MS/MS fragmentation analysis. Target-modifications were carried out to further enhance the antimicrobial and anti-proliferative bioactivities, whilst decreasing the hemolytic effect. A range of bioassays demonstrated that replacing a proline with a tyrosine residue resulted in a loss of the bioactivity against Gram-negative bacteria, but dramatically improved the hemolytic and anti-proliferative activity, indicating the FLP- motif influences the hemolytic activity of temporins...
November 27, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29190320/comparing-the-outcomes-of-adults-with-enterobacteriaceae-bacteremia-receiving-short-course-versus-prolonged-course-antibiotic-therapy-in-a-multicenter-propensity-score-matched-cohort
#8
Darunee Chotiprasitsakul, Jennifer H Han, Sara E Cosgrove, Anthony D Harris, Ebbing Lautenbach, Anna T Conley, Pam Tolomeo, Jacqueleen Wise, Pranita D Tamma
Background: The recommended duration of antibiotic treatment for Enterobacteriaceae bloodstream infections is 7-14 days. We compared the outcomes of patients receiving short-course (6-10 days) vs prolonged-course (11-16 days) antibiotic therapy for Enterobacteriaceae bacteremia. Methods: A retrospective cohort study was conducted at 3 medical centers and included patients with monomicrobial Enterobacteriaceae bacteremia treated with in vitro active therapy in the range of 6-16 days between 2008 and 2014...
October 8, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29189125/use-of-antibiotic-loaded-biomaterials-for-the-management-of-bone-prosthesis-infections-rationale-and-limits
#9
Matilde Tschon, Maria Sartori, Deyanira Contartese, Gianluca Giavaresi, Nicolo Nicoli Aldini, Milena Fini
BACKGROUND: Periprosthetic joint infection still represents a challenging issue for the orthopedic community. In the United States approximately a million joint arthroplasties are performed each year, with infection rates ranging from 1 to 2%: revisions has significant implications in health care costs and appropriate resources management. The use of locally applied antibiotics as a prophylaxis measure or as a component of the therapeutic approach in primary or revision surgery is finalized at eliminating any microorganism and strengthening the effectiveness of systemic therapy...
November 29, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29188174/diagnosis-of-persistent-infection-in-prosthetic-two-stage-exchange-pcr-analysis-of-sonication-fluid-from-bone-cement-spacers
#10
Sandrine Mariaux, Ulrika Furustrand Tafin, Olivier Borens
Introduction: When treating periprosthetic joint infections with a two-stage procedure, antibiotic-impregnated spacers are used in the interval between removal of prosthesis and reimplantation. According to our experience, cultures of sonicated spacers are most often negative. The objective of our study was to investigate whether PCR analysis would improve the detection of bacteria in the spacer sonication fluid. Methods: A prospective monocentric study was performed from September 2014 to January 2016. Inclusion criteria were two-stage procedure for prosthetic infection and agreement of the patient to participate in the study...
2017: Journal of Bone and Joint Infection
https://www.readbyqxmd.com/read/29188173/influence-of-sonication-on-bacterial-regrowth-from-antibiotic-loaded-pmma-scaffolds-an-in-vitro-study
#11
Martin Clauss, Esther Laschkolnig, Susanne Graf, Klaus-Dieter Kühn
Periprosthetic joint infection (PJI) is one of the most challenging complications after joint replacement. However, when treated correctly, chances of recovery are good. The most important step in correct diagnosis and management of PJI is the detection of the causative germ. In the last years, the use of sonication in the diagnostic process has become more important. However, this diagnostic methodology has been controversially discussed when used in combination with antibiotic loaded bone cement (PMMA), which is frequently used in joint replacement surgeries...
2017: Journal of Bone and Joint Infection
https://www.readbyqxmd.com/read/29187396/recombinant-endolysins-as-potential-therapeutics-against-antibiotic-resistant-staphylococcus-aureus-current-status-of-research-and-novel-delivery-strategies
#12
REVIEW
Hamed Haddad Kashani, Mathias Schmelcher, Hamed Sabzalipoor, Elahe Seyed Hosseini, Rezvan Moniri
Staphylococcus aureus is one of the most common pathogens of humans and animals, where it frequently colonizes skin and mucosal membranes. It is of major clinical importance as a nosocomial pathogen and causative agent of a wide array of diseases. Multidrug-resistant strains have become increasingly prevalent and represent a leading cause of morbidity and mortality. For this reason, novel strategies to combat multidrug-resistant pathogens are urgently needed. Bacteriophage-derived enzymes, so-called endolysins, and other peptidoglycan hydrolases with the ability to disrupt cell walls represent possible alternatives to conventional antibiotics...
January 2018: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/29185252/multidrug-resistant-or-antimicrobial-resistant-pathogens-alternatives-to-new-antibiotics
#13
Anne-Sophie Brunel, Benoit Guery
For the last few decades, multidrug resistance has become an increasing concern for both Gram-positive and Gram-negative bacteria. The number of new molecules has dramatically decreased and antibiotic resistance is now a priority in the international community. Facing this new threat, a large number of new as well as "old" solutions are now being discussed in the medical community to propose an alternative to antibiotic treatments. A first option is to potentiate the effect of existing molecules through combinations to circumvent the individual molecule resistance...
November 29, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/29184602/-giant-lithiasis-due-to-urinary-stasis-related-to-ileo-caecal-bladder
#14
Hamza Dergamoun, Zayd El Boukili El Makhoukhi
Bladder exstrophy is a malformation characterized by subumbilical anterior abdominal wall and anterior bladder wall deishence. It affects nearly 30.000-40.000 births per year, with a higher prevalence in boys. External continent urinary diversion creates a long-term outcome. However, it is not devoid of complications. We report the case of a 30-year old female patient who had undergone cystectomy with bladder replaced with ileo-caecal segment for bladder exstrophy 13 years earlier. She was followed up for 5 years and then lost to follow up...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/29181802/study-and-understanding-behavior-of-alginate-inulin-synbiotics-beads-for-protection-and-delivery-of-antimicrobial-producing-probiotics-in-colonic-simulated-conditions
#15
Abdelbasset Atia, Ahmed Gomaa, Benoit Fernandez, Muriel Subirade, Ismail Fliss
According to the World Health Organization (WHO), using antibiotics as growth promoters for livestock-particularly swine-is the principal cause of antibiotic resistance. It is therefore clear that finding an alternative to antibiotics becomes an emergency. Hundreds of recent studies have appointed probiotics as potential candidates to replace or to be used in combination with antibiotics. However, bringing probiotics alive to the colon-their site of action-remains a big challenge because of different physiological barriers encountered in proximal gastrointestinal tract (GIT) such as acidic pH and bile salts that may affect the viability of probiotic cultures...
November 27, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/29181355/group-b-streptococcal-prosthetic-knee-joint-infection-linked-to-the-consumption-of-raw-fish
#16
Gin Way Law, Limin Wijaya, Andrew Hwee Chye Tan
Introduction: Group B Streptococcal (GBS) prosthetic joint infections (PJI) are rare, accounting for only 4.6-6% of primary and revision total knee replacements (TKRs). In 2015, there was an outbreak of GBS infections in Singapore with an association confirmed between consumption of Chinese-style raw fish dishes (snakehead fish, Asian bighead carp) and GBS infection, Type III GBS ST283 strain, affecting more than 200 patients in Singapore. This outbreak is the largest of its kind in the world and also the first time that foodborne transmission of GBS has been proven...
July 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29181352/a-case-report-of-dual-incision-technique-for-total-femur-arthroplasty-as-a-salvage-procedure-in-infected-non-unions
#17
Aniruddh Agrawal, Vinod Agrawal, Sandeepkumar Yadav, Shushil K Soni, Sawan Kumar Pawar
Introduction: Total femur arthroplasty (TFA) is a rare salvage limb procedure which serves as an effective alternative to limb amputation. Most commonly, it is indicated for oncologic orthopedic cases, and very few cases of a purely traumatic history for TFA have been documented. The decision to perform this complex procedure involves paying careful attention to reconstructive needs and functional expectations of the patient. Alternatives to this procedure are quite detrimental and include hip disarticulation and above-the-knee amputation...
July 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29181299/persistent-bacteremia-secondary-to-delayed-identification-of-lactobacillus-in-the-setting-of-mitral-valve-endocarditis
#18
Cody Stroupe, Joseph Pendley, Emmanuel Isang, Benjamin Helms
Introduction: Lactobacillus species causing infective endocarditis is rare. Most reported cases arise from the oral ingestion of Lactobacillus via dairy or nutritional supplements in patients with congenital valve disease or replacement. We present a case of native valve bacterial endocarditis caused by Lactobacillus arising from dental abscesses. Additionally, there was an error in identification of the Lactobacillus as Corynebacterium, which led to inadequate treatment. Presentation of case: A 51-year-old male presented to an outside clinic with several weeks of subjective fevers and malaise...
2017: IDCases
https://www.readbyqxmd.com/read/29180920/urinary-free-cortisol-assessment-by-liquid-chromatography-tandem-mass-spectrometry-a-case-study-of-ion-suppression-due-to-unacquainted-administration-of-piperacillin
#19
REVIEW
Elisa Danese, Gian Luca Salvagno, Alessandra Guzzo, Samuele Scurati, Cristiano Fava, Giuseppe Lippi
Introduction: Liquid chromatography coupled to atmospheric pressure ionization tandem mass spectrometry (LC-ESI-MS/MS) is currently considered the reference method for quantitative determination of urinary free cortisol (UFC). One of the major drawbacks of this measurement is a particular form of matrix effect, conventionally known as ion suppression. Materials and methods: We describe here the case of a 66-year-old-patient referred to the daily service of general medicine for intravenous antibiotic administration due to a generalized Staphylococcus aureus infection and for routine 24 hours UFC monitoring in the setting of glucocorticoid replacement therapy...
October 15, 2017: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
https://www.readbyqxmd.com/read/29178982/microbiology-and-associated-risk-factors-in-alloplastic-total-joint-infections-a-20-year-retrospective-study
#20
Rhae Riegel, Kevin Sweeney, Gino Inverso, Peter Quinn, Eric J Granquist
PURPOSE: Prosthetic joint infection (PJI) is a rare complication of temporomandibular joint replacement (TJR). This study evaluated TJR PJIs at the authors' institution over a 20-year period, including micro-organisms cultured, antibiotic resistance patterns, and intraoperative protocols of TJR. PATIENTS AND METHODS: Patients were identified using Current Procedural Terminology and International Classification of Diseases, Ninth Revision codes and surgical logs from January 1995 through 2015...
November 8, 2017: Journal of Oral and Maxillofacial Surgery
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