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Neisseria gonorrhoeae

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https://www.readbyqxmd.com/read/28340291/-head-to-head-prenyl-synthases-in-some-pathogenic-bacteria
#1
Christopher J Schwalen, Xinxin Feng, Weidong Liu, Bing O-Dowd, Tzu-Ping Ko, Christopher J Shin, Rey-Ting Guo, Douglas A Mitchell, Eric Oldfield
Many organisms contain "head-to-head" isoprenoid synthases and here, we investigate three types of such enzymes from the pathogens Neisseria meningitidis, N. gonorrhoeae, and Enterococcus hirae. The E. hirae enzyme was found to produce dehydrosqualene and we solved an inhibitor-bound structure which revealed a fold similar to that of CrtM from Staphylococcus aureus. In contrast, the homologous proteins from Neisseria spp. carried out only the "first half" reaction, yielding presqualene diphosphate (PSPP). Based on product analyses, bioinformatics, and mutagenesis we conclude that the Neisseria proteins are HpnDs (PSPP synthases)...
March 24, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28333355/wgs-to-predict-antibiotic-mics-for-neisseria-gonorrhoeae
#2
David W Eyre, Dilrini De Silva, Kevin Cole, Joanna Peters, Michelle J Cole, Yonatan H Grad, Walter Demczuk, Irene Martin, Michael R Mulvey, Derrick W Crook, A Sarah Walker, Tim E A Peto, John Paul
Background: Tracking the spread of antimicrobial-resistant Neisseria gonorrhoeae is a major priority for national surveillance programmes. Objectives: We investigate whether WGS and simultaneous analysis of multiple resistance determinants can be used to predict antimicrobial susceptibilities to the level of MICs in N. gonorrhoeae. Methods: WGS was used to identify previously reported potential resistance determinants in 681 N. gonorrhoeae isolates, from England, the USA and Canada, with phenotypes for cefixime, penicillin, azithromycin, ciprofloxacin and tetracycline determined as part of national surveillance programmes...
March 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28329470/cutaneous-manifestations-of-disseminated-gonococcemia
#3
Surget V Beatrous, Stratton B Grisoli, Ryan R Riahi, Ryan J Matherne, Ryan J Matherne
BACKGROUND: Sexually transmitted infections, includingurogenital gonorrheal infection, are a growing healthconcern in the United States. Nearly 50% of cervicalinfections are asymptomatic. If left undiagnosedand untreated, there is a risk of disseminatedinfection. PURPOSE: To describe an 18-year-old womanpresenting with disseminated gonococcal infectionconfirmed by blood cultures, skin biopsy, and urinegonococcal probe. We also describe the presentation,diagnosis, and treatment of disseminated gonococcalinfection, including discussion of the variousmorphologies of cutaneous lesions that have beenreported in the literature...
January 15, 2017: Dermatology Online Journal
https://www.readbyqxmd.com/read/28329383/sulfadoxine-pyrimethamine-exhibits-dose-response-protection-against-adverse-birth-outcomes-related-to-sexually-transmitted-and-reproductive-tract-infections
#4
R Matthew Chico, Enesia Banda Chaponda, Cono Ariti, Daniel Chandramohan
Background.: We conducted a prospective cohort study in Zambia among pregnant women who received intermittent preventive treatment using sulfadoxine-pyrimethamine (IPTp-SP). Methods.: We calculated the odds ratios (ORs) of adverse birth outcomes by IPTp-SP exposure, 0-1 dose (n = 126) vs ≥2 doses (n = 590) and 2 doses (n = 310) vs ≥3 doses (n = 280) in 7 categories of malaria infection and sexually transmitted and reproductive tract infections (STIs/RTIs). Results...
March 2, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28303829/mutation-pattern-in-the-genome-of-neisseria-gonorrhoeae-and-its-association-with-multidrug-resistant-isolates-from-delhi-india
#5
Divya Sachdev, Indu Kumari, Manju Bala, Vineet Kumar, Daman Saluja
Mutations in PenA, PorB, MtrE and MtrR genes responsible for antimicrobial resistance were checked in 27 drug-resistant clinical isolates of Neisseria gonorrhoeae (NG). Phenotype PIB (88.88%) and mutation at G120 and A121 positions of porB were recurrent. N122K, a novel mutation, was observed in PorB in three resistant isolates. Substitution H105Y in MtrR was widespread (37% of clinical isolates). The presence of a novel mutation (L33V), along with G45D mutation in MtrR, was associated with less-resistant isolates, in contrast to isolates with G45D mutation alone...
January 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28302376/emerging-trends-in-antibiotic-resistance-implications-for-emergency-medicine
#6
Ali Pourmand, Maryann Mazer-Amirshahi, Gregory Jasani, Larissa May
BACKGROUND: Many bacteria are demonstrating increasing levels of resistance to commonly used antibiotics. While this has implications for the healthcare system as a whole, many patients infected with these resistant organisms will initially present to the emergency department (ED). The purpose of this review is to provide a summary of current trends in infections caused by the most clinically relevant resistant organisms encountered in emergency medicine. METHODS: Bacteria were selected based on the Centers for Disease Control and Prevention's National Action Plan for Combating Antibiotic Resistant Bacteria, and PubMed database...
March 7, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28301989/routine-testing-of-mycoplasma-genitalium-and-trichomonas-vaginalis
#7
Marieke L M Jenniskens, Jan H W Veerbeek, Koen L Deurloo, Erik J van Hannen, Steven F T Thijsen
BACKGROUND: Mycoplasma genitalium (MG) and Trichomonas vaginalis (TV) are common sexual transmitted infections (STI). However, most STI screening programmes do not include routinely detection of these pathogens. Consequently, epidemiological data about MG and TV in the general population is lacking. The current study aims to give insight into the prevalence of both infections, thereby guiding decisions whether testing for these pathogens should be included routinely. METHODS: Between February 2013 and August 2015, all samples sent to the laboratory of Diakonessenhuis Utrecht for STI testing (i...
June 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28290950/survey-of-sexually-transmitted-disease-laboratory-methods-in-u-s-army-laboratories-2012
#8
Nicole K Leamer, Nikki N Jordan, Laura A Pacha, Nabil H Latif, Eric C Garges, Joel C Gaydos
INTRODUCTION: Sexually transmitted diseases (STD) affect primarily young people (17-24 years). The U.S. Military, with many young people, strives to maintain effective STD treatment and prevention programs using current methods. Laboratory testing technology and capacity are important for appropriate clinical management and to provide data to direct prevention programs. STD laboratory capabilities are assessed in civilian and military laboratories using surveys. An Army laboratory survey was conducted in 2007...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28282646/point-of-care-sexually-transmitted-infection-diagnostics-proceedings-of-the-star-sexually-transmitted-infection-clinical-trial-group-programmatic-meeting
#9
Anthony D Cristillo, Claire C Bristow, Rosanna Peeling, Barbara Van Der Pol, Sasha Herbst de Cortina, Ivan K Dimov, Nitika Pant Pai, Dong Jin Shin, Ricky Y T Chiu, Catherine Klapperich, Purnima Madhivanan, Sheldon R Morris, Jeffrey D Klausner
The goal of the point-of-care (POC) sexually transmitted infection (STI) Diagnostics meeting was to review the state-of-the-art research and develop recommendations for the use of POC STI diagnostics. Experts from academia, government, nonprofit, and industry discussed POC diagnostics for STIs such as Chlamydia trachomatis, human papillomavirus, Neisseria gonorrhoeae, Trichomonas vaginalis, and Treponema pallidum. Key objectives included a review of current and emerging technologies, clinical and public health benefits, POC STI diagnostics in developing countries, regulatory considerations, and future areas of development...
April 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28282645/haemophilus-influenzae-isolated-from-men-with-acute-urethritis-its-pathogenic-roles-responses-to-antimicrobial-chemotherapies-and-antimicrobial-susceptibilities
#10
Shin Ito, Kyoko Hatazaki, Ken Shimuta, Hiromi Kondo, Kosuke Mizutani, Mitsuru Yasuda, Keita Nakane, Tomohiro Tsuchiya, Shigeaki Yokoi, Masahiro Nakano, Makoto Ohinishi, Takashi Deguchi
BACKGROUND: There have been few comprehensive studies on Haemophilus influenza-positive urethritis. METHODS: In this retrospective study, we enrolled 68 men with H. influenzae-positive urethritis, including coinfections with Neisseria gonorrhoeae, Chlamydia trachomatis, and/or genital mycoplasmas: 2, 3, 20, and 43 treated with ceftriaxone, levofloxacin, sitafloxacin, and extended-release azithromycin (azithromycin-SR), respectively. We assessed microbiological outcomes in 54 men and clinical outcomes in 46 with H...
April 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28282644/antimicrobial-susceptibility-evaluation-and-multiple-locus-variable-number-tandem-repeat-analysis-of-neisseria-gonorrhoeae-isolates-in-china-in-2012
#11
Rui-Xing Yu, Yueping Yin, Xiu-Qin Dai, Shao-Chun Chen, Yan Han, Bing-Jie Zheng, Guo-Yi Zhang, Xiang-Sheng Chen
OBJECTIVE: This study aimed to gain information on the antimicrobial susceptibility and molecular epidemiological typing of Neisseria gonorrhoeae (NG) isolates in China in 2012. METHODS: A total of 244 NG isolates were consecutively recovered from patients with uncomplicated gonorrhea attending sexually transmitted disease clinics in 3 Chinese cities-Guangzhou, Nanjing, and Tianjin-in 2012. Neisseria gonorrhoeae susceptibilities to penicillin and tetracycline were examined by detecting penicillinase-producing NG (PPNG) and high-level tetracycline-resistant NG, and NG susceptibilities to ciprofloxacin, spectinomycin, ceftriaxone, and cefixime were determined using an agar dilution method...
April 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28282365/antimicrobial-resistance-surveillance-for-neisseria-gonorrhoeae-what-do-we-really-need-to-know-to-guide-public-health-interventions
#12
David A Lewis
No abstract text is available yet for this article.
April 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28272393/experimental-vaccine-induces-th1-driven-immune-responses-and-resistance-to-neisseria-gonorrhoeae-infection-in-a-murine-model
#13
Y Liu, L A Hammer, W Liu, M M Hobbs, R A Zielke, A E Sikora, A E Jerse, N K Egilmez, M W Russell
Female mice were immunized intravaginally with gonococcal outer membrane vesicles (OMVs) plus microencapsulated interleukin-12 (IL-12), and challenged using an established model of genital infection with Neisseria gonorrhoeae. Whereas sham-immunized and control animals cleared the infection in 10-13 days, those immunized with OMV plus IL-12 cleared infection with homologous gonococcal strains in 6-9 days. Significant protection was also seen after challenge with antigenically distinct strains of N. gonorrhoeae, and protective anamnestic immunity persisted for at least 6 months after immunization...
March 8, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28260146/simultaneous-detection-and-identification-of-sti-pathogens-by-multiplex-real-time-pcr-in-genital-tract-specimens-in-a-selected-area-of-apulia-a-region-of-southern-italy
#14
Raffaele Del Prete, Luigi Ronga, Mirella Lestingi, Grazia Addati, Umberto Filippo Angelotti, Domenico Di Carlo, Giuseppe Miragliotta
PURPOSE: Genital tract infections are globally a major cause of morbidity in sexually active individuals. The aim of this study was to investigate the prevalence and associations of co-infections of Chlamydia trachomatis, Neisseria gonorrhoeae, Trichomonas vaginalis, Mycoplasma hominis (MH), Mycoplasma genitalium, Ureaplasma urealyticum (UU) and Ureaplasma parvum (UP) in specimens collected from female (SF) and male (SM) patients. METHODS: 1575 samples from 1575 individuals from the geographical area around Bari, Apulia region in Southern Italy, were collected and analyzed by a multiplex Real-Time PCR (mRT-PCR) (Anyplex(TM) II STI-7, Seegene, Inc...
March 4, 2017: Infection
https://www.readbyqxmd.com/read/28246379/the-antibiotic-resistance-crisis-with-a-focus-on-the-united-states
#15
REVIEW
Evan Martens, Arnold L Demain
Beginning with the discovery of penicillin by Alexander Fleming in the late 1920s, antibiotics have revolutionized the field of medicine. They have saved millions of lives each year, alleviated pain and suffering, and have even been used prophylactically for the prevention of infectious diseases. However, we have now reached a crisis where many antibiotics are no longer effective against even the simplest infections. Such infections often result in an increased number of hospitalizations, more treatment failures and the persistence of drug-resistant pathogens...
March 1, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/28241458/bulgecin%C3%A2-a-%C3%A2-the%C3%A2-key%C3%A2-to%C3%A2-a%C3%A2-broad-spectrum%C3%A2-inhibitor%C3%A2-that%C3%A2-targets%C3%A2-lytic%C3%A2-transglycosylases
#16
Allison H Williams, Richard Wheeler, Constance Thiriau, Ahmed Haouz, Muhamed-Kheir Taha, Ivo G Boneca
Lytic transglycosylases (Lts) are involved in recycling, cell division, and metabolism of the peptidoglycan. They have been understudied for their usefulness as potential antibacterial targets due to their high redundancy in Gram-negative bacteria. Bulgecin A is an O-sulphonated glycopeptide that targets primarily soluble lytic tranglycosylases (Slt). It has been shown that bulgecin A increases the efficacy of β-lactams that target penicillin bindings proteins (PBPs). Here, we present the high-resolution crystal structure of LtgA from Neisseria meningitidis strain MC58, a membrane bound homolog of Escherichia coli Slt, in complex with bulgecin A...
February 22, 2017: Antibiotics
https://www.readbyqxmd.com/read/28235839/sexual-partner-characteristics-and-incident-rectal-neisseria-gonorrhoeae-and-chlamydia-trachomatis-infections-among-gay-men-and-other-men-who-have-sex-with-men-msm-a-prospective-cohort-in-abuja-and-lagos-nigeria
#17
Habib O Ramadhani, Hongjie Liu, Rebecca G Nowak, Trevor A Crowell, Teclaire Ndomb, Charlotte Gaydos, Sheila Peel, Nicaise Ndembi, Stefan D Baral, Julie Ake, Man E Charurat
BACKGROUND: STIs including Neisseria gonorrhoeae (NG) and Chlamydia trachomatis (CT) potentiate HIV acquisition and transmission especially among gay men and other men who have sex with men (MSM). We investigated the influence of sexual network composition on incident rectal NG and/or CT infections among Nigerian MSM. METHODS: TRUST/RV368 is a cohort of MSM recruited using respondent-driven sampling at trusted community centres in Abuja and Lagos, Nigeria. MSM respondents (egos) provided STI risk factors and demographic information for up to five of their most recent sexual partners (alters) within their sexual networks...
February 24, 2017: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/28228492/neisseria-gonorrhoeae-sequence-typing-for-antimicrobial-resistance-ng-star-a-novel-antimicrobial-resistance-multilocus-typing-scheme-for-tracking-the-global-dissemination-of-n-gonorrhoeae-strains
#18
W Demczuk, S Sidhu, M Unemo, D M Whiley, V G Allen, J R Dillon, M Cole, C Seah, E Trembizki, D L Trees, E N Kersh, A J Abrams, H J C de Vries, A P van Dam, I Medina, A Bharat, M R Mulvey, G Van Domselaar, I Martin
A curated web-based user-friendly sequence typing tool based on antimicrobial resistance determinants in Neisseria gonorrhoeae was developed and is publicly accessible at https://ngstar.canada.ca The N. gonorrhoeae Sequence Typing for Antimicrobial Resistance (NG-STAR) molecular typing scheme uses the DNA sequences of 7 genes (penA, mtrR, porB, ponA, gyrA, parC, 23S rRNA) associated with resistance to β-lactam antimicrobials, macrolides, or fluoroquinolones. NG-STAR uses the entire penA sequence combining the historical nomenclature for penA types I-XXXVIII with novel nucleotide sequence designations; the full mtrR sequence and a portion of its promoter region; portions of ponA, porB, gyrA and parC; and 23S rRNA sequences...
February 22, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28216070/corrigendum-to-changes-in-the-six-most-common-sequence-types-of-neisseria-gonorrhoeae-including-st4378-identified-by-surveillance-of-antimicrobial-resistance-in-northern-taiwan-from-2006-to-2013-j%C3%A2-microbiol-immunol-infect-49-5-2016-708-716
#19
Ching-Wai Cheng, Lan-Hui Li, Chen-Yi Su, Shu-Ying Li, Muh-Yong Yen
No abstract text is available yet for this article.
February 16, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28210887/drug-resistant-neisseria-gonorrhoeae-latest-developments
#20
REVIEW
B Suay-García, M T Pérez-Gracia
Gonorrhea is the second most frequently reported notifiable disease in the United States and is becoming increasingly common in Europe. The purpose of this review was to assess the current state of drug-resistant Neisseria gonorrhoeae in order to evaluate future prospects for its treatment. An exhaustive literature search was conducted to include the latest research regarding drug resistance and treatment guidelines for gonorrhea. Gonococci have acquired all known resistance mechanisms to all antimicrobials used for treatment...
February 16, 2017: European Journal of Clinical Microbiology & Infectious Diseases
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