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Ana Gabriela Travassos, Eveline Xavier Pereira de Souza, Eduardo Netto, Eda Vinhaes Dantas, Maiara Timbó, Isabella Nóbrega, Tatiana Haguihara, Júlia Maria de Oliveira Neumeyer, Nathalia Araújo Lisboa, Maria Angela Soidan, Fábio Ferreira, Carlos Brites
BACKGROUND: Infections caused by Chlamydia trachomatis and Neisseria gonorrhoeae are the most common bacterial sexually transmitted infections throughout the world. These sexually transmitted infections are a growing problem in people living with HIV/AIDS. However, the presence of these agents in extra genital sites, remains poorly studied in our country. The objective of this study was to estimate the prevalence of Chlamydia trachomatis and Neisseria gonorrhoeae anal and genital infection in people living with HIV/AIDS followed in a reference center in Salvador, Brazil...
October 17, 2016: Brazilian Journal of Infectious Diseases
Bernhard Reuss, Abdul R Asif, Abdullah Almamy, Christian Schwerk, Horst Schroten, Hiroshi Ishikawa, Charis Drummer, Rüdiger Behr
Prenatal maternal infections with Neisseria gonorrhoeae (NG) correlate with an increased lifetime probability for the offspring to develop psychosis. We could previously demonstrate that in human choroid plexus papilloma cells, anti-NG antibodies (α-NG) bind to mitochondrial proteins HSP60 and ATPB, and interfere with cellular energy metabolism. To assess the in vivo relevance for this, especially during prenatal neural development, we investigated here interactions of NG-specific antisera (α-NG1, α-NG2) with brain, choroid plexus and other non-neural tissues in pre- and perinatal samples of the nonhuman primate (NHP) Callithrix jacchus (CJ), a NHP model for preclinical research...
October 17, 2016: Brain Research
Linda Garton, Amalie Dyda, Rebecca Guy, Bronwyn Silver, Skye McGregor, Belinda Hengel, Alice Rumbold, Debbie Taylor-Thomson, Janet Knox, Lisa Maher, John Kaldor, James Ward
Background: Extremely high rates of diagnosis of Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG) have been recorded in remote communities across northern and central Australia. Re-testing at 3 months, after treatment administered, of CT or NG is recommended to detect repeat infections and prevent morbidity and ongoing transmission. Methods: Baseline CT and NG laboratory data (2009-2010) from 65 remote health services participating in a cluster randomised trial was used to calculate the proportion of individuals re-tested after an initial CT or NG diagnosis at <2 months (not recommended), 2-4 months (recommended) and 5-12 months and the proportion with repeat positivity on re-test...
October 21, 2016: Sexual Health
J Serra-Pladevall, M J Barberá, A E Callarisa, R Bartolomé-Comas, A Andreu
This study compared the antimicrobial susceptibility and genotypes of strains of Neisseria gonorrhoeae isolated from men who have sex with men (MSM) and from heterosexuals. One hundred and eleven strains were characterized from 107 patients, comprising 57 strains from 54 heterosexuals and 54 strains from 53 MSM. Antimicrobial resistance rates were higher in strains from heterosexual patients, with resistance to cefixime (P = 0·0159) and ciprofloxacin (P = 0·002) being significantly higher. Typing by N. gonorrhoeae multi-antigen sequence typing (NG-MAST) showed that the most prevalent sequence types (ST) and genogroups (G) respectively were ST2400, ST2992, and ST5793, and G1407, G2992, and G2400...
October 19, 2016: Epidemiology and Infection
Ali Bilal, Muhamed-Kheir Taha, Laurence Caeymaex, Robert Cohen, Corinne Levy, Xavier Durrmeyer
Among 831 cases of neonatal bacterial meningitis occurring from 2001 to 2013, Neisseria meningitidis was the third most frequent bacterial species found. All cases occurred only in term neonates and were mainly late onset. Serogroup B accounted for 78% of cases. At diagnosis, 27% of cases had at least one sign of disease severity. All strains were susceptible to cefotaxime, but 12% showed intermediate susceptibility to penicillin G and to aminopenicillin.
November 2016: Pediatric Infectious Disease Journal
Mansour Amin, Mozhgan Ghaderpanah, Tahereh Navidifar
Meningitis is a life-threatening infection associated with a high mortality and morbidity worldwide. Neisseria meningitidis, Haemophilus influenzae, and Streptococcus pneumoniae are the most prevalent infectious agents that cause bacterial meningitis (BM). The objective of this study was to determine the frequencies of these three bacteria using bacterial cultures and polymerase chain reaction (PCR). In our cross-sectional study, cerebrospinal fluid (CSF) specimens were obtained from 196 patients who were suspected of having BM and referred to the pediatric ward of Abuzar Hospital (Ahvaz, Iran)...
October 2016: Kaohsiung Journal of Medical Sciences
Krzysztof Korzeniewski, M Konior, M Kiedrowska, E Wódka, E Zwolińska, A Skoczyńska
The article presents the prevalence of Neisseria meningitidis carriage with the identification of sero- and genogroups in professional soldiers serving in the Polish Armed Forces. A total of 1246 soldiers from the 10th Armored Cavalry Brigade in Świętoszów, Poland were examined in the period January-February 2016. Microbiological tests were performed using standard methods (culture, incubation, microscopy, biochemical, and automated identification with VITEK cards). Neisseria meningitidis isolates from carriers were subjected to a slide agglutination test for the identification of serogroups, next bacterial DNA was isolated and genogroups were identified based on the results of PCR...
October 14, 2016: Advances in Experimental Medicine and Biology
Getachew Tesfaye Beyene, Seetha V Balasingham, Stephan A Frye, Amine Namouchi, Håvard Homberset, Shewit Kalayou, Tahira Riaz, Tone Tønjum
Neisseria meningitidis (Nm) is a Gram-negative oral commensal that opportunistically can cause septicaemia and/or meningitis. Here, we overexpressed, purified and characterized the Nm DNA repair/recombination helicase RecG (RecGNm) and examined its role during genotoxic stress. RecGNm possessed ATP-dependent DNA binding and unwinding activities in vitro on a variety of DNA model substrates including a Holliday junction (HJ). Database searching of the Nm genomes identified 49 single nucleotide polymorphisms (SNPs) in the recGNm including 37 non-synonymous SNPs (nsSNPs), and 7 of the nsSNPs were located in the codons for conserved active site residues of RecGNm...
2016: PloS One
Manju Bala, Vikram Singh, Aradhana Bhargava, Monika Kakran, Naveen Chandra Joshi, Ravi Bhatnagar
Antimicrobial susceptibility testing of 258 N. gonorrhoeae isolates by Etest determined that 60.1% were MDR while 5% strains had decreased susceptibility to currently recommended extended-spectrum cephalosporins (ESCs). Among these, 84.5% MDR and 76.9% strains having decreased susceptibility to ESCs were susceptible to gentamicin. No MDR isolate was resistant to gentamicin. These in vitro results suggest that gentamicin might be an effective treatment option for the MDR strains and in dual therapy for gonorrhea...
October 10, 2016: Antimicrobial Agents and Chemotherapy
Ala-Eddine Deghmane, Eva Hong, Muhamed-Kheir Taha
OBJECTIVES: Reduced susceptibility to penicillin G in Neisseria meningitidis is mainly due to alterations in PBP2 encoded by the penA gene. However, this phenotype was not associated with reduced susceptibility to third-generation cephalosporins (C3Gs). We aimed to study the emergence of meningococci with reduced susceptibility to C3Gs (MIC >0.06 mg/L) in France since 2012. METHODS: Invasive meningococcal isolates were typed by MLST and penA sequencing and their antibiotic susceptibility was tested...
October 12, 2016: Journal of Antimicrobial Chemotherapy
Jari Intra, Roberta Maria Sala, Rosanna Falbo, Fabrizio Cappellini, Paolo Brambilla
Rapid and early identification of microorganisms in blood has a key role in the diagnosis of a febrile patient, in particular, in guiding the clinician to define the correct antibiotic therapy. This study presents a simple and very fast method with high performances for identifying bacteria by matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) after only 4 hours of incubation. We used early bacterial growth on PolyViteX chocolate agar plates inoculated with 5 drops of blood-broth medium deposited in the same point and spread with a sterile loop, followed by a direct transfer procedure on MALDI-TOF MS target slides without additional modification...
October 12, 2016: Letters in Applied Microbiology
Kay M Tomashek, Aidsa Rivera, Brenda Torres-Velasquez, Elizabeth A Hunsperger, Jorge L Munoz-Jordan, Tyler M Sharp, Irma Rivera, Dario Sanabria, Dianna M Blau, Renee Galloway, Jose Torres, Rosa Rodriguez, Javier Serrano, Carlos Chávez, Francisco Dávila, Janice Perez-Padilla, Esther M Ellis, Gladys Caballero, Laura Wright, Sherif R Zaki, Carmen Deseda, Edda Rodriguez, Harold S Margolis
BACKGROUND: Dengue is a leading cause of morbidity throughout the tropics; however, accurate population-based estimates of mortality rates are not available. METHODS/PRINCIPAL FINDINGS: We established the Enhanced Fatal Acute Febrile Illness Surveillance System (EFASS) to estimate dengue mortality rates in Puerto Rico. Healthcare professionals submitted serum and tissue specimens from patients who died from a dengue-like acute febrile illness, and death certificates were reviewed to identify additional cases...
October 2016: PLoS Neglected Tropical Diseases
Carolien M Wind, Maarten F Schim van der Loeff, Magnus Unemo, Rob Schuurman, Alje P van Dam, Henry J C de Vries
BACKGROUND: Performing a test of cure (TOC) could demonstrate success or failure of antimicrobial treatment of Chlamydia trachomatis infection, but recommendations for the timing of a TOC using nucleic acid amplification tests (NAATs) are inconsistent. We assessed time to clearance of C. trachomatis after treatment, using modern RNA- and DNA-based NAATs. METHODS: We analysed data from patients with a C. trachomatis and Neisseria gonorrhoeae coinfection who visited the STI Clinic Amsterdam, The Netherlands, from March through October 2014...
October 11, 2016: BMC Infectious Diseases
Pushpa Bhawan Mal, Kauser Jabeen, Joveria Farooqi, Magnus Unemo, Erum Khan
BACKGROUND: Accurate detection of Neisseria gonorrhoeae antimicrobial resistance is essential for appropriate management and prevention of spread of infection in the community. In this study Calibrated Dichotomous Sensitivity (CDS) and Clinical Laboratory Standards Institute (CLSI) disc diffusion methods were compared with minimum inhibitory concentration (MIC) by Etest in Neisseria gonorrhoeae isolates from Karachi, Pakistan. CDS and CLSI disc diffusion techniques, and Etest for ceftriaxone, penicillin G, spectinomycin and ciprofloxacin against 100 isolates from years 2012-2014 were performed...
October 10, 2016: BMC Microbiology
Jesús Arenas, Jan Tommassen
Extracellular DNA (eDNA) is an essential constituent of the extracellular matrix of biofilms of many microorganisms. In spite of many studies, it has long remained unclear how exactly eDNA exerts its role in biofilm formation. Here, we describe recent advances that have been made in understanding biofilm formation in the human pathogen Neisseria meningitidis. Several cell-surface-exposed proteins have been identified that bind DNA and other negatively charged polymers, such as heparin, by electrostatic interactions...
October 3, 2016: Trends in Microbiology
Krzysztof Mikołajczyk, Radosław Kaczmarek, Marcin Czerwiński
Transcription factor EKLF (Erythroid Krüppel-Like Factor) belongs to the group of Krüppellike factors, which regulate proliferation, differentiation, development and apoptosis of mammalian cells. EKLF factor is present in erythroid cells, where it participates in regulation of hematopoiesis, expression of genes encoding transmembrane proteins (including blood group antigens), and heme biosynthesis enzymes. It is also a key factor in downregulation of γ-globins and activation of β-globin gene expression...
October 6, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
Namraj Goire, Ratan Kundu, Ella Trembizki, Cameron Buckley, Tiffany R Hogan, David A Lewis, James M Branley, David M Whiley, Monica M Lahra
OBJECTIVES: Previous studies have shown that mixed-strain gonococcal infections can occur. However, it remains unclear whether such infections impact upon the reliability of Neisseria gonorrhoeae antimicrobial resistance (AMR) surveillance. In this study, we aimed to resolve this question by intensively sampling isolates from gonorrhoea-positive specimens in a high-risk population in Sydney, Australia. METHODS: A total of 615 N. gonorrhoeae isolates, originating from 63 clinical samples (31 rectal swabs and 32 throat swabs), were characterized...
October 5, 2016: Journal of Antimicrobial Chemotherapy
R Somayaji, C Naugler, M Guo, D Church
Bacterial sexually transmitted infections including Chlamydia trachomatis and Neisseria gonorrhoeae remain an important public health concern. We aimed to assess the population-based incidence of C. trachomatis and N. gonorrhoeae in an age-standardized cohort over time. A retrospective study of a large Canadian health region was undertaken between 2010 and 2015 using linked census and digital laboratory data. C. trachomatis and N. gonorrhoeae tests were linked to patient data. Sex and age-standardized incidence rates (IR) and ratios (IRR) were calculated for cases and testing rates...
October 5, 2016: International Journal of STD & AIDS
Charifa Zemouri, Teodora Elvira Wi, James Kiarie, Armando Seuc, Vittal Mogasale, Ahmed Latif, Nathalie Broutet
BACKGROUND: This review aimed to synthesize and analyze the diagnostic accuracy and the likelihood of providing correct treatment of the syndromic approach Vaginal Discharge Flowchart in managing cervical infections caused by Neisseria gonorrhoeae (NG) and Chlamydia trachomatis (CT), and vaginal infections caused by Trichomonas vaginalis (TV) and Bacterial vaginosis (BV) and Candida albicans. This review will inform updating the WHO 2003 guidelines on Vaginal Discharge syndromic case management...
2016: PloS One
Monique T Barakat, Kiran Gajurel, Katrina Fischer, Kathryn Stevens, Errol Ozdalga, José G Montoya
The clinical spectrum of Neisseria meningitidis can range from nasopharyngeal colonization to life-threatening invasive diseases such as meningitis. However, its etiologic role in invasive pyomyositis (PM) has never been reported before in the English language. In this study, we report the first case of PM in the English language and the second case in the literature caused by N meningitidis.
September 2016: Open Forum Infectious Diseases
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