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Multiple drug resistant organism

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https://www.readbyqxmd.com/read/28526792/environmental-spread-of-ndm-1-producing-multi-drug-resistant-bacteria-in-dhaka-bangladesh
#1
Mohammad Aminul Islam, Moydul Islam, Rashedul Hasan, M Iqbal Hossain, Ashikun Nabi, Mahdia Rahman, Wil H F Goessens, Hubert P Endtz, Alexandria B Boehm, Shah M Faruque
Resistance to carbapenem antibiotics through the production of New Delhi Metallo-╬▓-lactamase-1 (NDM-1) constitutes an emerging challenge in the treatment of bacterial infections. To monitor possible source of spread of these organisms in Dhaka, Bangladesh, we conducted comparative analysis of waste water samples from hospital adjacent areas (HAR) and from community areas (COM) as well as public tap water samples for the occurrence and characteristics of NDM-1 producing bacteria. Of 72 HAR samples tested 51 (71%) were positive for NDM-1-producing bacteria as evidenced by phenotypic tests and the presence of blaNDM-1 gene, compared to 5 of 41 (12...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28516494/recommendations-for-approaches-to-meticillin-resistant-staphylococcal-infections-of-small-animals-diagnosis-therapeutic-considerations-and-preventative-measures-clinical-consensus-guidelines-of-the-world-association-for-veterinary-dermatology
#2
REVIEW
Daniel O Morris, Anette Loeffler, Meghan F Davis, Luca Guardabassi, J Scott Weese
BACKGROUND: Multiple drug resistance (MDR) in staphylococci, including resistance to the semi-synthetic penicillinase-resistant penicillins such as meticillin, is a problem of global proportions that presents serious challenges to the successful treatment of staphylococcal infections of companion animals. OBJECTIVES: The objective of this document is to provide harmonized recommendations for the diagnosis, prevention and treatment of meticillin-resistant staphylococcal infections in dogs and cats...
June 2017: Veterinary Dermatology
https://www.readbyqxmd.com/read/28512703/metal-homeostasis-in-bacteria-the-role-of-arsr-smtb-family-of-transcriptional-repressors-in-combating-varying-metal-concentrations-in-the-environment
#3
REVIEW
Rudra P Saha, Saikat Samanta, Surajit Patra, Diganta Sarkar, Abinit Saha, Manoj Kumar Singh
Bacterial infections cause severe medical problems worldwide, resulting in considerable death and loss of capital. With the ever-increasing rise of antibiotic-resistant bacteria and the lack of development of new antibiotics, research on metal-based antimicrobial therapy has now gained pace. Metal ions are essential for survival, but can be highly toxic to organisms if their concentrations are not strictly controlled. Through evolution, bacteria have acquired complex metal-management systems that allow them to acquire metals that they need for survival in different challenging environments while evading metal toxicity...
May 16, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28507720/in-vivo-imaging-of-leucine-aminopeptidase-activity-in-drug-induced-liver-injury-and-liver-cancer-via-a-near-infrared-fluorescent-probe
#4
Xinyuan He, Lihong Li, Yu Fang, Wen Shi, Xiaohua Li, Huimin Ma
The liver, a main detoxification organ, has evolved a complex enzymatic system to respond to multiple pathological conditions, in which leucine aminopeptidase (LAP) has been reported to participate in detoxifying cisplatin in hepatoma cells and contribute to the intrinsic drug resistance. In vivo imaging of LAP activity in liver disease models is thus helpful to further understand the function of LAP in detoxification and medicine, but such an imaging approach is still lacking. Herein, we develop a selective and sensitive near-infrared fluorescent probe (HCAL) for this purpose...
May 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28497114/selectable-markers-for-use-in-genetic-manipulation-of-extensively-drug-resistant-xdr-acinetobacter-baumannii-humc1
#5
Brian M Luna, Amber Ulhaq, Jun Yan, Paul Pantapalangkoor, Travis B Nielsen, Bryan W Davies, Luis A Actis, Brad Spellberg
Acinetobacter baumannii is one of the most antibiotic-resistant pathogens in clinical medicine, and extensively drug-resistant (XDR) strains are commonly isolated from infected patients. Such XDR strains are already resistant to traditional selectable genetic markers, limiting the ability to conduct pathogenesis research by genetic disruption. Optimization of selectable markers is therefore critical for the advancement of fundamental molecular biology techniques to use in these strains. We screened 23 drugs that constitute a broad array of antibiotics spanning multiple drug classes against HUMC1, a highly virulent and XDR A...
March 2017: MSphere
https://www.readbyqxmd.com/read/28475768/white-paper-developing-antimicrobial-drugs-for-resistant-pathogens-narrow-spectrum-indications-and-unmet-needs
#6
Helen W Boucher, Paul G Ambrose, H F Chambers, Richard H Ebright, Amanda Jezek, Barbara E Murray, Jason G Newland, Belinda Ostrowsky, John H Rex
Despite progress in antimicrobial drug development, a critical need persists for new, feasible pathways to develop antibacterial agents to treat people infected with drug-resistant bacteria. Infections due to resistant Gram-negative bacilli continue to cause unacceptable morbidity and mortality. Antibacterial agents have been traditionally studied in non-inferiority clinical trials that focus on one site of infection (eg, complicated urinary tract infections, intra-abdominal infections), yet these designs may not be optimal, and often are not feasible, for study of infections caused by drug-resistant bacteria...
May 5, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28454589/prevalence-and-antimicrobial-resistance-profile-of-staphylococcus-in-dairy-farms-abattoir-and-humans-in-addis-ababa-ethiopia
#7
Takele Beyene, Halefom Hayishe, Fikru Gizaw, Ashenafi Feyisa Beyi, Fufa Abunna, Bedaso Mammo, Dinka Ayana, Hika Waktole, Reta Duguma Abdi
BACKGROUND: Staphylococcus species cause mastitis and wound infection in livestock and food poisoning in humans through ingestion of contaminated foods, including meat and dairy products. They are evolving pathogens in that they readily acquire drug resistance, and multiple drug-resistant (MDR) isolates are increasing in human and veterinary healthcare. Therefore, this study was conducted to evaluate the prevalence of Staphylococci and their drug resistance in dairy farms and abattoir settings of Addis Ababa...
April 28, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28452995/twelve-year-analysis-of-microbial-keratitis-trends-at-a-uk-tertiary-hospital
#8
S Z Tan, A Walkden, L Au, C Fullwood, A Hamilton, A Qamruddin, M Armstrong, A K Brahma, F Carley
PurposeTo investigate the frequencies, trends, and in vitro drug susceptibilities of the causative pathogens in microbial keratitis in Manchester Royal Eye Hospital.Patients and methodsCorneal scrape results recorded by the microbiology service between 2004 and 2015 were extracted from an established database. A total of 4229 corneal scrape specimens were identified from an established database. First-line antibiotic treatment in our centre during the study period was ofloxacin and second line was cefuroxime and gentamicin...
April 28, 2017: Eye
https://www.readbyqxmd.com/read/28451037/colonisation-of-antibiotic-resistant-bacteria-in-a-cohort-of-hiv-infected-children-in-ghana
#9
Eric Sampane-Donkor, Ebenezer Vincent Badoe, Jennifer Adoley Annan, Nicholas Nii-Trebi
Antibiotic use not only selects for resistance in pathogenic bacteria, but also in commensal flora of exposed individuals. Little is known epidemiologically about antibiotic resistance in relation to people with HIV infection in sub-Saharan Africa. This study investigated the carriage of antibiotic resistant bacteria among HIV infected children at a tertiary hospital in Ghana. One hundred and eighteen HIV positive children were recruited at the Korle-Bu Teaching Hospital in Ghana and nasopharyngeal specimens were collected from them...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28440583/topical-antibiotics-and-intravitreal-injections
#10
REVIEW
Alex P Hunyor, Rohan Merani, Archie Darbar, Jean-Fran├žois Korobelnik, Paolo Lanzetta, Annabelle A Okada
There is increasing evidence that topical antibiotics, given before and/or after intravitreal injections, are ineffective in preventing endophthalmitis and are possibly harmful. In addition to the lack of efficacy and increased development of resistant organisms, the use of topical antibiotics adds significantly to the cost of delivering intravitreal therapy. Despite this, in many countries, it is still common practice to use pre- and/or postinjection topical antibiotics. This review outlines the general principles of effective antibiotic prophylaxis, and the evidence regarding topical antibiotic use as a prophylactic measure for endophthalmitis following intravitreal injections...
April 25, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28438781/transporter-mediated-disposition-clinical-pharmacokinetics-and-cholestatic-potential-of-glyburide-and-its-primary-active-metabolites
#11
Rui Li, Yi-An Bi, Anna Vildhede, Renato J Scialis, Sumathy Mathialagan, Xin Yang, Lisa D Marroquin, Jian Lin, Manthena V S Varma
Glyburide is widely used for the treatment of type 2 diabetes mellitus. We studied the mechanisms involved in the disposition of glyburide and its pharmacologically active hydroxy metabolites, M1 and M2b; and evaluated their clinical pharmacokinetics and the potential role in glyburide-induced cholestasis employing physiologically based pharmacokinetic (PBPK) modeling. Transport studies of parent and metabolites in human hepatocytes and transfected cell systems imply hepatic uptake mediated by organic anion transporting polypeptides...
April 24, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28437620/american-association-of-clinical-endocrinologists-and-american-college-of-endocrinology-guidelines-for-management-of-dyslipidemia-and-prevention-of-cardiovascular-disease
#12
Paul S Jellinger, Yehuda Handelsman, Paul D Rosenblit, Zachary T Bloomgarden, Vivian A Fonseca, Alan J Garber, George Grunberger, Chris K Guerin, David S H Bell, Jeffrey I Mechanick, Rachel Pessah-Pollack, Kathleen Wyne, Donald Smith, Eliot A Brinton, Sergio Fazio, Michael Davidson
OBJECTIVE: The development of these guidelines is mandated by the American Association of Clinical Endocrinologists (AACE) Board of Directors and American College of Endocrinology (ACE) Board of Trustees and adheres with published AACE protocols for the standardized production of clinical practice guidelines (CPGs). METHODS: Recommendations are based on diligent reviews of the clinical evidence with transparent incorporation of subjective factors, according to established AACE/ACE guidelines for guidelines protocols...
April 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28436748/disruption-of-tetr-type-regulator-aden-by-mobile-genetic-element-confers-elevated-virulence-in-acinetobacter-baumannii
#13
Rajagopalan Saranathan, Sudhakar Pagal, Ajit R Sawant, Archana Tomar, M Madhangi, Suresh Sah, Annapurna Satti, K P Arunkumar, K Prashanth
Acinetobacter baumannii is an important human pathogen and considered as a major threat due to its extreme drug resistance. In this study, the genome of a hyper-virulent MDR strain PKAB07 of A. baumannii isolated from an Indian patient was sequenced and analysed to understand its mechanisms of virulence, resistance and evolution. Comparative genomics analysis of PKAB07 revealed virulence and resistance related genes scattered throughout the genome, instead of being organized as an island, indicating the highly mosaic nature of the genome...
April 24, 2017: Virulence
https://www.readbyqxmd.com/read/28429672/the-molecular-mechanisms-of-thalidomide-teratogenicity-and-implications-for-modern-medicine
#14
J Knobloch, D Jungck, A Koch
Thalidomide is a teratogen that affects many organs but primarily induces limb truncations like phocomelia. Rodents are thalidomide resistant. In the 1950s, this has led to misinterpretations of animal tests and to the fatal assumption that the drug was safe for pregnant women to use against morning sickness. The result was one of the biggest scandals in medical history: 10.000 and more infants with birth defects in Europe. Nonetheless, thalidomide still has its place in modern medicine as it has strong therapeutic potential: it has been approved by the FDA for multiple myeloma and erythema nodosum leprosum, and its anti-inflammatory, immunomodulatory and anti-angiogenic activities are considered in many other refractory diseases...
March 31, 2017: Current Molecular Medicine
https://www.readbyqxmd.com/read/28420614/applications-of-genome-editing-tools-in-precision-medicine-research
#15
Li Shuang, Yang Yuanyuan, Qiu Yan, Chen Yanhao, Xu Luwei, Ding Qiurong
The emergence of genome editing tools, such as the clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated 9 (Cas9) system, has enabled researchers to achieve somatic and germline genomic manipulations in cell lines and model organisms. Within a couple of years, genome editing is now being rapidly developed for multiple applications and widely used in biomedical researches, including creation of disease models with desired genetic mutations, screening in a high-throughput manner for drug resistance genes, and making appropriate editions to genes in vivo for disease treatment...
March 20, 2017: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/28398275/natural-killer-t-cell-lymphomas-in-pediatric-and-adolescent-patients
#16
REVIEW
Amanda M Termuhlen
Natural killer/T-cell (NK/T-cell) lymphomas are rare in children and adolescents and consist predominantly of nasal-type extranodal NK/T-cell lymphomas. More than half of pediatric/adolescent patients with NK/T-cell lymphomas present with localized nasal/sinus involvement, but the disease may involve many organs. NK/T-cell lymphoma cells are cytotoxic and associated with necrosis and angioinvasion; they express CD56, CD2, cytoplasmic CD3 epsilon, and to a variable degree CD30. The cells contain Epstein-Barr virus (EBV)-encoded RNA...
March 2017: Clinical Advances in Hematology & Oncology: H&O
https://www.readbyqxmd.com/read/28392829/a-robust-protocol-for-efficient-generation-and-genomic-characterization-of-insertional-mutants-of-chlamydomonas-reinhardtii
#17
Steve V Pollock, Bratati Mukherjee, Joanna Bajsa-Hirschel, Marylou C Machingura, Ananya Mukherjee, Arthur R Grossman, James V Moroney
BACKGROUND: Random insertional mutagenesis of Chlamydomonas reinhardtii using drug resistance cassettes has contributed to the generation of tens of thousands of transformants in dozens of labs around the world. In many instances these insertional mutants have helped elucidate the genetic basis of various physiological processes in this model organism. Unfortunately, the insertion sites of many interesting mutants are never defined due to experimental difficulties in establishing the location of the inserted cassette in the Chlamydomonas genome...
2017: Plant Methods
https://www.readbyqxmd.com/read/28392413/isolation-and-identification-of-multiple-drug-resistant-nontuberculous-mycobacteria-from-organs-of-cattle-produced-typical-granuloma-lesions
#18
Guangyu Cheng, Donglei Xu, Jinling Wang, Chunfa Liu, Yang Zhou, Yongyong Cui, Hancan Liu, Kanglin Wan, Xiangmei Zhou
Nontuberculosis mycobacteria are widespread in the environment and some are zoonotic. 320 tissue samples with visible lesions were obtained from dairy cows and examined by histopathology. Eleven samples showed typical granulomatous lesions and a total of 8 strains were cultured. Three genes (16S rRNA, hsp65 and rpoB) were sequenced for species identification. All mycobacterial isolates were tested for rifampicin, isoniazid, ethambutol, streptomycin, capreomycin, kanamycin, para-aminosalicylic acid susceptibility...
April 6, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28387179/chemotherapy-of-tuberculosis
#19
Thomas E Dobbs, Risa M Webb
The management of tuberculosis (TB) can be a challenging process that has implications both for the affected patient and public health. Effective anti-TB chemotherapy both cures and renders the patient noncontagious. Biological factors specific to M. tuberculosis necessitate the use of multiple drugs for prolonged durations to adequately eradicate infection. Recommended regimens address the complexities of eliminating organisms from diverse reservoirs while preventing the emergence of drug resistance. First-line anti-TB therapy for drug susceptible disease effectively cures almost all patients within 6-9 months...
April 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28361737/therapy-of-multidrug-resistant-and-extensively-drug-resistant-tuberculosis
#20
Barbara J Seaworth, David E Griffith
The global epidemic of multidrug-resistant tuberculosis (MDR-TB) caused by Mycobacterium tuberculosis strains resistant to at least isoniazid and rifampin was recently reported as larger than previously estimated, with at least 580,000 new cases reported in 2015. Extensively drug-resistant tuberculosis (XDR-TB), MDR-TB with additional resistance to a second-line fluoroquinolone and injectable, continues to account for nearly 10% of MDR cases globally. Cases in India, China, and the Russian Federation account for >45% of the cases of MDR-TB...
March 2017: Microbiology Spectrum
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