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https://www.readbyqxmd.com/read/28443807/-persistent-therapy-resistant-conjunctivitis-consider-infection-with-chlamydia-trachomatis
#1
L van Wagensveld, F A van der Sluijs, R H C Zegers
Conjunctivitis is a frequently diagnosed disease, usually caused by a virus. A less well-known cause is a chlamydia infection. This may result in missed diagnoses, delay of treatment and several complications. We present two cases of a persistent, therapy-resistant conjunctivitis in patients who were over 70 years of age. One patient had conjunctival follicles, characteristic of chlamydia conjunctivitis. The polymerase chain reaction tests of conjunctival samples from both patients were positive for chlamydia...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28441360/erythromycin-modification-that-improves-its-acidic-stability-while-optimizing-it-for-local-drug-delivery
#2
Erika L Cyphert, Jaqueline D Wallat, Jonathan K Pokorski, Horst A von Recum
The antibiotic erythromycin has limited efficacy and bioavailability due to its instability and conversion under acidic conditions via an intramolecular dehydration reaction. To improve the stability of erythromycin, several analogs have been developed-such as azithromycin and clarithromycin-which decrease the rate of intramolecular dehydration. We set out to build upon this prior work by developing a conjugate of erythromycin with improved pH stability, bioavailability, and preferential release from a drug delivery system directly at the low pH of an infection site...
April 25, 2017: Antibiotics
https://www.readbyqxmd.com/read/28439298/multi-drug-resistant-pathogenic-bacteria-in-the-gut-of-young-children-in-bangladesh
#3
Shirajum Monira, Syeda Antara Shabnam, Sk Imran Ali, Abdus Sadique, Fatema-Tuz Johura, Kazi Zillur Rahman, Nur Haque Alam, Haruo Watanabe, Munirul Alam
BACKGROUND: The gut of human harbors diverse commensal microbiota performing an array of beneficial role for the hosts. In the present study, the major commensal gut bacteria isolated by culturing methods from 15 children of moderate income families, aged between 10 and 24 months, were studied for their response to different antibiotics, and the molecular basis of drug resistance. RESULTS: Of 122 bacterial colonies primarily selected from Luria-Bertani agar, bacterial genera confirmed by analytical profile index (API) 20E(®) system included Escherichia as the predominant (52%) organism, followed by Enterobacter (16%), Pseudomonas (12%), Klebsiella (6%), Pantoea (6%), Vibrio (3%), and Citrobacter (3%); while Aeromonas and Raoultella were identified as the infrequently occurring genera...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28438948/macrolide-and-quinolone-resistant-mycoplasma-genitalium-in-a-man-with-persistent-urethritis-the-tip-of-the-british-iceberg
#4
Suneeta Soni, Andy Parkhouse, Gillian Dean
There is growing concern worldwide for macrolide resistance in M. genitalium following liberal use of 1 g azithromycin to treat non-gonococcal urethritis and confirmed C. trachomatis infection. Moxifloxacin is the second-line treatment for M. genitalium and still has excellent efficacy against it. However, recent reports indicating that quinolone resistance is more prevalent than previously thought are worrying. Routine testing of symptomatic men and women for M. genitalium is not currently recommended in BASHH guidelines, and attempts to implement such testing have been hampered by a lack of commercially available assays...
April 24, 2017: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/28438539/recurrent-acute-rhinosinusitis-prevention-by-azithromycin-in-children-with-nonallergic-rhinitis
#5
Jittima Veskitkul, Patcharaporn Wongkaewpothong, Tanita Thaweethamchareon, Kitirat Ungkanont, Nualanong Visitsunthorn, Punchama Pacharn, Pakit Vichyanond, Orathai Jirapongsananuruk
BACKGROUND: Recurrent acute rhinosinusitis (RARS) is characterized by multiple episodes of acute rhinosinusitis between which symptoms and signs resolve completely. The role of antibiotic prophylaxis to prevent RARS in children with nonallergic rhinitis (NAR) has not been investigated. OBJECTIVE: To evaluate the effect of azithromycin to prevent RARS in children with NAR. METHODS: A randomized, double-blind, placebo-controlled study was conducted in NAR children (5-15 years) with RARS...
April 21, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28436019/antibiotic-therapy-for-pelvic-inflammatory-disease
#6
REVIEW
Ricardo F Savaris, Daniele G Fuhrich, Rui V Duarte, Sebastian Franik, Jonathan Ross
BACKGROUND: Pelvic inflammatory disease (PID) is an infection that affects 4% to 12% of young women, and is one of the most common causes of morbidity in this age group. The main intervention for acute PID is the use of broad-spectrum antibiotics which cover Chlamydia trachomatis, Neisseria gonorrhoeae, and anaerobic bacteria, administered intravenously, intramuscularly, or orally. In this review, we assessed the optimal treatment regimen for PID. OBJECTIVES: To assess the effectiveness and safety of antibiotic regimens used to treat pelvic inflammatory disease...
April 24, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28432937/subantibiotic-dose-of-azithromycin-attenuates-alveolar-bone-destruction-and-improves-trabecular-microarchitectures-in-a-rat-model-of-experimental-periodontitis-a-study-using-micro-computed-tomography
#7
Hye-Shin Park, Yong Sun Lee, Eun-Young Choi, Jeom-Il Choi, In Soon Choi, Sung-Jo Kim
Azithromycin, a macrolide antibiotic, has anti-inflammatory and immunomodulatory activities apart from its antibacterial properties. In this study, we examined the efficacy of subantibiotic dose of azithromycin on ligature-induced periodontitis in rats using micro-computed tomography (micro-CT) imaging and bone parameter analysis. Male Sprague-Dawley rats were allocated to the following four groups: non-ligation (NL) group; ligation-only (L) group; ligation-plus-subantibiotic dose azithromycin (SA) group; and 4) ligation-plus-antibiotic dose azithromycin (AA) group...
April 19, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28431096/a-new-rapid-resazurin-based-microdilution-assay-for-antimicrobial-susceptibility-testing-of-neisseria-gonorrhoeae
#8
Sunniva Foerster, Valentino Desilvestro, Lucy J Hathaway, Christian L Althaus, Magnus Unemo
Objectives: Rapid, cost-effective and objective methods for antimicrobial susceptibility testing of Neisseria gonorrhoeae would greatly enhance surveillance of antimicrobial resistance. Etest, disc diffusion and agar dilution methods are subjective, mostly laborious for large-scale testing and take ∼24 h. We aimed to develop a rapid broth microdilution assay using resazurin (blue), which is converted into resorufin (pink fluorescence) in the presence of viable bacteria. Methods: The resazurin-based broth microdilution assay was established using 132 N...
April 19, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28430086/genotypic-relatedness-and-antimicrobial-resistance-of-salmonella-heidelberg-isolated-from-chickens-and-turkeys-in-the-midwestern-united-states
#9
Muhammad Nisar, Issmat I Kassem, Gireesh Rajashekara, Sagar M Goyal, Dale Lauer, Shauna Voss, Kakambi V Nagaraja
Salmonella is one of the most common causes of foodborne illnesses in humans in the United States, and domestic poultry is considered an important source of this pathogen. Salmonella enterica subsp. enterica serovar Heidelberg is the fourth most commonly reported Salmonella from retail meats and food animals in the United States. We assessed the genotypes and antimicrobial resistance phenotypes of Salmonella Heidelberg isolated from various chicken and turkey hatcheries and breeder farms in the Midwest. The genotypes of 33 S...
May 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28429679/mycobacterium-avium-complex-disease
#10
Charles L Daley
Despite the ubiqitous nature of Mycobacterium avium complex (MAC) organisms in the environment, relatively few of those who are infected develop disease. Thus, some degree of susceptibility due to either underlying lung disease or immunosuppression is required. The frequency of pulmonary MAC disease is increasing in many areas, and the exact reasons are unknown. Isolation of MAC from a respiratory specimen does not necessarily mean that treatment is required, as the decision to treatment requires the synthesis of clinical, radiographic, and microbiologic information as well as a weighing of the risks and benefits for the individual patient...
April 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28426811/procalcitonin-for-selecting-the-antibiotic-regimen-in-outpatients-with-low-risk-community-acquired-pneumonia-using-a-rapid-point-of-care-testing-a-single-arm-clinical-trial
#11
Mar Masiá, Sergio Padilla, Victoria Ortiz de la Tabla, Matilde González, Cristina Bas, Félix Gutiérrez
OBJECTIVE: We aimed to assess the role of procalcitonin (PCT) to guide the initial selection of the antibiotic regimen for low-risk community-acquired pneumonia (CAP). METHODS: A single-arm clinical trial was conducted including outpatients with CAP and Pneumonia Severity Index risk classes I-II. Antimicrobial selection was based on the results of PCT measured with a rapid point-of-care testing. According to serum PCT levels, patients were assigned to two treatment strategies: oral azithromycin if PCT was <0...
2017: PloS One
https://www.readbyqxmd.com/read/28421633/efficacy-of-tulathromycin-for-the-treatment-of-foals-with-mild-to-moderate-bronchopneumonia
#12
D Rutenberg, M Venner, S Giguère
BACKGROUND: There is conflicting data regarding the efficacy of tulathromycin for the treatment of foals with bronchopneumonia. HYPOTHESES: Tulathromycin is effective for the treatment of bronchopneumonia in foals and noninferior to the combination of azithromycin and rifampin. ANIMALS: A total of 240 foals on a farm endemic for infections caused by Rhodococcus equi. METHODS: In a controlled, randomized, and double-blinded clinical trial, foals with ultrasonographic pulmonary lesions (abscess score 10-15 cm) were allocated to 3 groups: 1-tulathromycin IM q 7 days (n = 80); 2-azithromycin-rifampin, orally q24h (n = 80); or 3-untreated controls (n = 80)...
April 19, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28421551/macrolides-digoxin-toxicity-and-the-risk-of-sudden-death-a-population-based-study
#13
Kieran L Quinn, Erin M Macdonald, Tara Gomes, Muhammad M Mamdani, Anjie Huang, David N Juurlink
INTRODUCTION: Digoxin is commonly prescribed to elderly patients with heart failure and atrial fibrillation, and macrolide antibiotics markedly increase the risk of digoxin toxicity. OBJECTIVE: The aim was to determine whether, in older patients receiving digoxin, macrolide antibiotics are associated with sudden death. METHODS: We used a population-based, nested, case-control design from January 1, 1994 to December 31, 2012 in a cohort of Ontario residents aged 66 years or older prescribed digoxin...
April 18, 2017: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/28420680/use-of-azithromycin-and-risk-of-ventricular-arrhythmia
#14
Gianluca Trifirò, Maria de Ridder, Janet Sultana, Alessandro Oteri, Peter Rijnbeek, Serena Pecchioli, Giampiero Mazzaglia, Irene Bezemer, Edeltraut Garbe, Tania Schink, Elisabetta Poluzzi, Trine Frøslev, Mariam Molokhia, Igor Diemberger, Miriam C J M Sturkenboom
BACKGROUND: There are conflicting findings from observational studies of the arrhythrogenic potential of azithromycin. Our aim was to quantify the association between azithromycin use and the risk of ventricular arrhythmia. METHODS: We conducted a nested case-control study within a cohort of new antibiotic users identified from a network of 7 population-based health care databases in Denmark, Germany, Italy, the Netherlands and the United Kingdom for the period 1997-2010...
April 18, 2017: CMAJ: Canadian Medical Association Journal, Journal de L'Association Medicale Canadienne
https://www.readbyqxmd.com/read/28419786/toward-the-rational-design-of-macrolide-antibiotics-to-combat-resistance
#15
Anna Pavlova, Jerry M Parks, Adegboyega K Oyelere, James C Gumbart
Macrolides, one of the most prescribed classes of antibiotics, bind in the bacterial ribosome's polypeptide exit tunnel and inhibit translation. However, mutations and other ribosomal modifications, especially to the base A2058 of the 23S rRNA, have led to a growing resistance problem. Here, we have used molecular dynamics simulations to study the macrolides erythromycin and azithromycin in wild-type, A2058G-mutated, and singly or doubly A2058-methylated E. coli ribosomes. We find that the ribosomal modifications result in less favorable interactions between the base 2058 and the desosamine sugar of the macrolides, as well as greater displacement of the macrolides from their crystal structure position, illuminating the causes of resistance...
April 17, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28418319/increasing-macrolide-and-fluoroquinolone-resistance-in-mycoplasma-genitalium
#16
Gerald L Murray, Catriona S Bradshaw, Melanie Bissessor, Jennifer Danielewski, Suzanne M Garland, Jørgen S Jensen, Christopher K Fairley, Sepehr N Tabrizi
Escalating resistance to azithromycin and moxifloxacin is being reported for Mycoplasma genitalium in the Asia-Pacific region. Analyzing 140 infections, we found pretreatment fluoroquinolone-resistance mutations in parC (13.6%) and gyrA (5%). ParC S83 changes were associated with moxifloxacin failure. Combined macrolide/fluoroquinolone-resistance mutations were in 8.6% of specimens, for which recommended therapies would be ineffective.
May 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28418303/azithromycin-resistance-and-decreased-ceftriaxone-susceptibility-in-neisseria-gonorrhoeae-hawaii-usa
#17
John R Papp, A Jeanine Abrams, Evelyn Nash, Alan R Katz, Robert D Kirkcaldy, Norman P O'Connor, Pamela S O'Brien, Derek H Harauchi, Eloisa V Maningas, Olusegun O Soge, Ellen N Kersh, Alan Komeya, Juval E Tomas, Glenn M Wasserman, Gail Y Kunimoto, David L Trees, A Christian Whelen
During 2016, eight Neisseria gonorrhoeae isolates from 7 patients in Hawaii were resistant to azithromycin; 5 had decreased in vitro susceptibility to ceftriaxone. Genomic analysis demonstrated a distinct phylogenetic clade when compared with local contemporary strains. Continued evolution and widespread transmission of these strains might challenge the effectiveness of current therapeutic options.
May 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28415826/azithromycin-augments-rhinovirus-induced-ifn%C3%AE-via-cytosolic-mda5-in-experimental-models-of-asthma-exacerbation
#18
Mandy Menzel, Hamid Akbarshahi, Ellen Tufvesson, Carl Persson, Leif Bjermer, Lena Uller
Deficient production of anti-viral interferons (IFNs) may be involved in causing viral-induced asthma exacerbations. Hence, drugs inducing lung IFN production would be warranted. Azithromycin may reduce asthma exacerbations but its modus operandi is unknown. Here, we investigated if azithromycin induces IFNβ expression in vitro in rhinovirus-infected bronchial epithelial cells from asthmatic donors and in vivo in our allergic inflammation-based mouse model of viral stimulus-induced asthma exacerbations. Azithromycin dose-dependently augmented viral-induced IFNβ expression in asthmatic, but not in healthy bronchial epithelial cells...
March 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28413775/an-interesting-case-of-mycoplasma-pneumonia-associated-multisystem-involvement-and-diffuse-alveolar-hemorrhage
#19
Rashmi Mishra, Edison Cano, Sindhaghatta Venkatram, Gilda Diaz-Fuentes
Severe mycoplasma pneumonia is a rare entity with only 0.5-2% of cases having a fulminant course. We present a 74-year-old woman with hypertension, diabetes mellitus and remote history of marginal zone B-cell lymphoma admitted with abdominal pain and diarrhea of 1-2 days associated with body-aches, dyspnea, dry cough and weight loss for 2-3 weeks. On physical exam, she was febrile, tachypneic, tachycardic and hypoxic on room air. Chest examination revealed diffuse crackles and end-expiratory wheezes. Laboratory tests showed anemia, acute-on-chronic kidney injury and hyaline casts and epithelial cells in the urine analysis...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28413102/-antibiotic-susceptibility-of-staphylococcus-aureus-and-streptococcus-pneumoniae-in-healthy-carrier-individuals-in-primary-care-in-barcelona-area
#20
Carles Llor, Albert Boada, Mariona Pons-Vigués, Elisabet Grenzner, Rosa Juvé, Jesús Almeda
INTRODUCTION: The information available on antibiotic resistance patterns are generally based on specimens from hospitalised individuals. This study was aimed at evaluating the antibiotic resistance rate of nasal carriage strains of Staphylococcus aureus and Streptococcus pneumoniae in healthy individuals, in accordance with age and gender, attended in Primary Care Centres (PCC). DESIGN: Cross-sectional study. SETTING: Seven PCC in the Barcelona area...
April 13, 2017: Atencion Primaria
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