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Antioxidant, Antimicrobial Properties And Phenolics Of Different Solvent Extracts From Bark, Leaves And Seeds Of Pongamia Pinnata (L.) Pierre, Zahid Iqbal Sajid, Farooq Anwar, Ghulam Shabir, Ghulam Rasul, Khalid M. Alkharfy, Anwarul Hassan Gilani

Department of Biological & Biomedical Sciences

This study appraises the antioxidant and antimicrobial attributes of various solvent extracts (absolute methanol, aqueous methanol, absolute ethanol, aqueous ethanol, absolute acetone, aqueous acetone, and deionized water) from bark, leaves and seeds of Pongamia pinnata (L.) Pierre. Maximum extraction yield of antioxidant components from bark (16.31%), leaves (11.42%) and seeds (21.51%) of P. pinnata was obtained using aqueous methanol (20:80). Of the extracts tested, the bark extract, obtained with aqueous methanol, exhibited greater levels of total phenolics [6.94 g GAE/100 g dry weight (DW)], total flavonoids (3.44 g CE/100 g DW), inhibition of linoleic acid peroxidation (69.23%) and DPPH radical …

Identification Of Bovine Leukemia Virus Tax Function Associated With Host Cell Transcription, Signaling, Stress Response And Immune Response Pathway By Microarray-Based Gene Expression Analysis., Mariluz Araínga, Eri Takeda, Yoko Aida

Journal Articles: Pharmacology & Experimental Neuroscience

BACKGROUND: Bovine leukemia virus (BLV) is associated with enzootic bovine leukosis and is closely related to human T-cell leukemia virus type I. The Tax protein of BLV is a transcriptional activator of viral replication and a key contributor to oncogenic potential. We previously identified interesting mutant forms of Tax with elevated (TaxD247G) or reduced (TaxS240P) transactivation effects on BLV replication and propagation. However, the effects of these mutations on functions other than transcriptional activation are unknown. In this study, to identify genes that play a role in the cascade of signal events regulated by wild-type and mutant Tax proteins, we …

Heme Oxygenase-1 Regulates The Immune Response To Influenza Virus Infection And Vaccination In Aged Mice, Nathan W. Cummins, Eric A. Weaver, Shannon M. May, Anthony J. Croatt, Oded Foreman, Richard B. Kennedy, Gregory A. Poland, Michael A. Barry, Karl A. Nath, Andrew D. Badley

Nebraska Center for Virology: Faculty Publications

Underlying mechanisms of individual variation in severity of influenza infection and response to vaccination are poorly understood. We investigated the effect of reduced heme oxygenase-1 (HO-1) expression on vaccine response and outcome of influenza infection. HO-1-deficient and wild-type (WT) mice (kingdom, Animalia; phylum, Chordata; genus/species, Mus musculus) were infected with influenza virus A/PR/8/34 with or without prior vaccination with an adenoviral-based influenza vaccine. A genome-wide association study evaluated the expression of single-nucleotide polymorphisms (SNPs) in the HO-1 gene and the response to influenza vaccination in healthy humans. HO-1-deficient mice had decreased survival after influenza infection compared to WT mice (median …

Development Of A Humanized Hla-A2.1/Dp4 Transgenic Mouse Model And The Use Of This Model To Map Hla-Dp4-Restricted Epitopes Of Hbv Envelope Protein, Zhitao Ru, Wenjun Xiao, Anthony Pajot, Zhihua Kou, Shihui Sun, Benard Maillere, Guangyu Zhao, David M. Ojcius, Yu-Chun Lone, Yusen Zhou

All Dugoni School of Dentistry Faculty Articles

A new homozygous humanized transgenic mouse strain, HLA-A2.1^+/+HLA-DP4^+/+ hCD4^+/+mCD4^−/−IAβ^−/−β2m^−/− (HLA-A2/DP4), was obtained by crossing the previously characterized HLA-A2^+/+β2m−/− (A2) mouse and our previously created HLA-DP4^+/+ hCD4^+/+mCD4^−/−IAβ^−/− (DP4) mouse. We confirmed that the transgenes (HLA-A2, HLA-DP4, hCD4) inherited from the parental A2 and DP4 mice are functional in the HLA-A2/DP4 mice. After immunizing HLA-A2/DP4 mice with a hepatitis B DNA vaccine, hepatitis B virus-specific antibodies, HLA-A2-restricted and HLA-DP4-restricted responses were observed to be similar to those in naturally infected humans. Therefore, the present …

Enhanced Protective Efficacy Of A Chimeric Form Of The Schistosomiasis Vaccine Antigen Sm-Tsp-2, Mark S. Pearson, Darren A. Pickering, Henry J. Mcsorley, Jeffrey M. Bethony, Leon Tribolet, Annette M. Dougall, Peter J. Hotez, Alex Loukas

Microbiology, Immunology, and Tropical Medicine Faculty Publications

The large extracellular loop of the Schistosoma mansoni tetraspanin, Sm-TSP-2, when fused to a thioredoxin partner and formulated with Freund's adjuvants, has been shown to be an efficacious vaccine against murine schistosomiasis. Moreover, Sm-TSP-2 is uniquely recognised by IgG1 and IgG3 from putatively resistant individuals resident in S. mansoniendemic areas in Brazil. In the present study, we expressed Sm-TSP-2 at high yield and in soluble form in E. coli without the need for a solubility enhancing fusion partner. We also expressed in E. coli a chimera called Sm-TSP-2/5B, which consisted of Sm-TSP-2 fused to …

Molecular Diagnostics: The Changing Culture Of Medical Microbiology, Susan Bullman, Brigid Lucey, Roy D. Sleator

Department of Biological Sciences Publications

Diagnostic molecular biology is arguably the fastest growing area in current laboratory-based medicine. Growth of the so called ‘omics’ technologies has, over the last decade, led to a gradual migration away from the ‘one test, one pathogen’ paradigm, toward multiplex approaches to infectious disease diagnosis, which have led to significant improvements in clinical diagnostics and ultimately improved patient care.

Characterising The Mucosal And Systemic Immune Responses To Experimental Human Hookworm Infection., Soraya Gaze, Henry J. Mcsorley, James Daveson, Di Jones, Jeffrey M. Bethony, Luciana M. Oliveira, Richard Speare, James S. Mccarthy, Christian R. Engwerda, John Croese, Alex Loukas

Microbiology, Immunology, and Tropical Medicine Faculty Publications

The mucosal cytokine response of healthy humans to parasitic helminths has never been reported. We investigated the systemic and mucosal cytokine responses to hookworm infection in experimentally infected, previously hookworm naive individuals from non-endemic areas. We collected both peripheral blood and duodenal biopsies to assess the systemic immune response, as well as the response at the site of adult worm establishment. Our results show that experimental hookworm infection leads to a strong systemic and mucosal Th2 (IL-4, IL-5, IL-9 and IL-13) and regulatory (IL-10 and TGF-β) response, with some evidence of a Th1 (IFN-γ and IL-2) response. Despite upregulation after …

Localization And Sub-Cellular Shuttling Of Htlv-1 Tax With The Mirna Machinery, Rachel Van Duyne, Irene Guendel, Zachary Klase, Aarthi Narayanan, William Coley, Elizabeth Jaworski, Jessica Roman, Anastas Popratiloff, Renaud Mahieux, Kylene Kehn-Hall, Fatah Kashanchi

Microbiology, Immunology, and Tropical Medicine Faculty Publications

The innate ability of the human cell to silence endogenous retroviruses through RNA sequences encoding microRNAs, suggests that the cellular RNAi machinery is a major means by which the host mounts a defense response against present day retroviruses. Indeed, cellular miRNAs target and hybridize to specific sequences of both HTLV-1 and HIV-1 viral transcripts. However, much like the variety of host immune responses to retroviral infection, the virus itself contains mechanisms that assist in the evasion of viral inhibition through control of the cellular RNAi pathway. Retroviruses can hijack both the enzymatic and catalytic components of the RNAi pathway, in …

Manipulating Fate: Medical Innovations, Ethical Implications, Theatrical Illuminations, Karen H. Rothenberg, Lynn W. Bush

Faculty Scholarship

Transformative innovations in medicine and their ethical complexities create frequent confusion and misinterpretation that color the imagination. Placed in historical context, theatre provides a framework to reflect upon how the ethical, legal, and social implications of emerging technologies evolve over time and how attempts to control fate through medical science have shaped -- and been shaped by -- personal and professional relationships. The drama of these human interactions is powerful and has the potential to generate fear, create hope, transform identity, and inspire empathy -- a vivid source to observe the complex implications of translating research into clinical practice through …

Redefining Chronic Toxoplasmosis: A T Cell Exhaustion Perspective, Rajarshi Bhadra, Imtiaz A. Khan

Microbiology, Immunology, and Tropical Medicine Faculty Publications

No abstract provided.

The Adjuvanticity Of An O. Volvulus-Derived Rov-Asp-1 Protein In Mice Using Sequential Vaccinations And In Non-Human Primates, Jing Wang, Nancy Trichoche, Lanying Du, Meredith Hunter, Bin Zhan, Gaddam Goud, Elizabeth S. Didier, Jing Liu, Lu Lu, Preston A. Marx, Shibo Jiang, Sara Lustigman

Microbiology, Immunology, and Tropical Medicine Faculty Publications

Adjuvants potentiate antigen-specific protective immune responses and can be key elements promoting vaccine effectiveness. We previously reported that the Onchocerca volvulusrecombinant protein rOv-ASP-1 can induce activation and maturation of naïve human DCs and therefore could be used as an innate adjuvant to promote balanced Th1 and Th2 responses to bystander vaccine antigens in mice. With a few vaccine antigens, it also promoted a Th1-biased response based on pronounced induction of Th1-associated IgG2a and IgG2b antibody responses and the upregulated production of Th1 cytokines, including IL-2, IFN-γ, TNF-α and IL-6. However, because it is a protein, the r …

Early Events In Herpes Simplex Virus Lifecycle With Implications For An Infection Of Lifetime, Sarah Salameh '12, Urmi Sheth '12, Deepak Shukla

Student Publications & Research

Affecting a large percentage of human population herpes simplex virus (HSV) types -1 and -2 mainly cause oral, ocular, and genital diseases. Infection begins with viral entry into a host cell, which may be preceded by viral “surfing” along filopodia. Viral glycoproteins then bind to one or more of several cell surface receptors, such as herpesvirus entry mediator (HVEM), nectin-1, 3-O sulfated heparan sulfate (3-OS HS), paired immunoglobulin-like receptor, and non-muscle myosin-IIA. At least five viral envelope glycoproteins participate in entry and these include gB, gC, gD and gH-gL. Post-entry, these glycoproteins may also facilitate cell-to-cell spread of the virus, …

Aleuria Aurantia Lectin (Aal)-Reactive Immunoglobulin G Rapidly Appears In Sera Of Animals Following Antigen Exposure., Songming Chen, Chen Lu, Hongbo Gu, Anand Mehta, Jianwei Li, Patrick B Romano, David Horn, D Craig Hooper, Carthene R Bazemore-Walker, Timothy Block

Department of Cancer Biology Faculty Papers

We have discovered an Aleuria Aurantia Lectin (AAL)-reactive immunoglobulin G (IgG) that naturally occurs in the circulation of rabbits and mice, following immune responses induced by various foreign antigens. AAL can specifically bind to fucose moieties on glycoproteins. However, most serum IgGs are poorly bound by AAL unless they are denatured or treated with glycosidase. In this study, using an immunogen-independent AAL-antibody microarray assay that we developed, we detected AAL-reactive IgG in the sera of all animals that had been immunized 1-2 weeks previously with various immunogens with and without adjuvants and developed immunogen-specific responses. All of these animals subsequently …

Aleuria Aurantia Lectin (Aal)-Reactive Immunoglobulin G Rapidly Appears In Sera Of Animals Following Antigen Exposure., Songming Chen, Chen Lu, Hongbo Gu, Anand Mehta, Jianwei Li, Patrick B Romano, David Horn, D Craig Hooper, Carthene R Bazemore-Walker, Timothy Block

Department of Cancer Biology Faculty Papers

We have discovered an Aleuria Aurantia Lectin (AAL)-reactive immunoglobulin G (IgG) that naturally occurs in the circulation of rabbits and mice, following immune responses induced by various foreign antigens. AAL can specifically bind to fucose moieties on glycoproteins. However, most serum IgGs are poorly bound by AAL unless they are denatured or treated with glycosidase. In this study, using an immunogen-independent AAL-antibody microarray assay that we developed, we detected AAL-reactive IgG in the sera of all animals that had been immunized 1-2 weeks previously with various immunogens with and without adjuvants and developed immunogen-specific responses. All of these animals subsequently …

Triticum Mosaic Poacevirus Enlists P1 Rather Than Hc-Pro To Suppress Rna Silencing-Mediated Host Defense, Satyanarayana Tatineni, Feng Qu, Ruhui Li, Thomas Jack Morris, Roy French

Nebraska Center for Virology: Faculty Publications

Triticum mosaic virus (TriMV) is the type species of the newly established Poacevirus genus in the family Potyviridae. In this study, we demonstrate that in contrast to the helper component- proteinase (HC-Pro) of Potyvirus species, the P1 proteins of TriMV and Sugarcane steak mosaic poacevirus function in suppression of RNA silencing (SRS). TriMV P1 effectively suppressed silencing induced by single- or double-stranded RNAs (ss/ds RNAs), and disrupted the systemic spread of silencing signals at a step after silencing signal production. Interestingly, contrary to enhanced SRS activity of potyviral HC-Pro by co-expression with P1, the presence of TriMV HC-Pro reduced …

Identification Of Molecular Determinants From Moloney Leukemia Virus 10 Homolog (Mov10) Protein For Virion Packaging And Anti-Hiv-1 Activity, Aierken Abudu, Xiaojun Wang, Ying Dang, Tao Zhou, Shi-Hua Xiang, Yong -Hui Zheng

Nebraska Center for Virology: Faculty Publications

Background: MOV₁₀ inhibits HIV-1 replication after being packaged.

Results: A Gag binding plus all but one of seven helicase domains are required for MOV^₁₀ packaging. Nearly all residues are required for anti-HIV-1 activity. Conclusion: Gag binding is not sufficient for MOV₁₀ packaging, and multiple discontinuous domains regulate MOV₁₀ activity.

Significance: These findings uncover a new packaging mechanism and provide new insights into MOV₁₀ antiviral activity.

Contribution Of The Infection-Associated Complement Regulator-Acquiring Surface Protein 4 (Erpc) To Complement Resistance Of Borrelia Burgdorferi, Claudia Hammerschmidt, Teresia Hallström, Christine Skerka, Reinhard Wallich, Brian Stevenson, Peter F Zipfel, Peter Kraiczy

Microbiology, Immunology, and Molecular Genetics Faculty Publications

Borrelia burgdorferi evades complement-mediated killing by interacting with complement regulators through distinct complement regulator-acquiring surface proteins (CRASPs). Here, we extend our analyses to the contribution of CRASP-4 in mediating complement resistance of B. burgdorferi and its interaction with human complement regulators. CRASP-4 (also known as ErpC) was immobilized onto magnetic beads and used to capture proteins from human serum. Following Western blotting, factor H (CFH), CFH-related protein 1 (CFHR1), CFHR2, and CFHR5 were identified as ligands of CRASP-4. To analyze the impact of native CRASP-4 on mediating survival of serum-sensitive cells in human serum, a B. garinii strain was generated …

Cutaneous Anthrax Patients In Eastern Anatolia, Turkey: A Review Of 44 Adults Cases, Kemaletti̇n Özden, Zülal Özkurt, Serpi̇l Erol, Muhammet Hami̇dullah Uyanik, Mehmet Parlak

Turkish Journal of Medical Sciences

Anthrax is a zoonotic infectious disease caused by B. anthracis. It remains as an important issue in developing countries and it is a potential threat for the world because of its use as a biological weapon. In this study, we evaluated the epidemiological, clinical, and laboratory characteristics of 44 patients with cutaneous anthrax in our region. Materials and methods: The study included 44 cutaneous anthrax patients admitted to our hospital from the Eastern Anatolia Region of Turkey between 2005 and 2008. Results: Out of 44 cases, 24 (54.5%) were male and 20 (45.5%) female. The mean age was 41 ± …

Seroprevalence Of Major Blood-Borne Infections Among Blood Donors In Kano, Nigeria, Emmanuel Nwankwo, Imoru Momodu, Ismaila Umar, Babashani Musa, Solomon Adeleke

Turkish Journal of Medical Sciences

To examine the seroprevalence of common blood infections among blood donors, which remains a major concern in transfusion medicine in Nigeria. Blood transfusion is one of the known therapeutic interventions that cut across a number of clinical disciplines. Materials and methods: The seroprevalences of human immunodeficiency virus (HIV), hepatitis C virus (HCV), hepatitis B surface antigen (HBsAg), and syphilis among 280 blood donors at the Murtala Mohammed Specialist Hospital (MMSH) were determined. The seroprevalences of the pathogens were determined with regard to age, sex, donor category, and occurrence of association pathogens. Between June and December 2008, 276 males (98.6%) and …

Plasma Lipid Levels In Patients With Acute Bacterial Infections, Mohammad Nassaji, Raheb Ghorbani

Turkish Journal of Medical Sciences

To assess the impact of acute bacterial infections on plasma lipid levels and to determine the value of plasma lipid measurements in the diagnosis of acute bacterial infection. Materials and methods: A cross-sectional study was conducted involving 112 patients with acute bacterial infections admitted in hospital and 112 healthy individuals as controls. Levels of total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein, and triglycerides were measured in blood samples of all subjects. Mean levels of serum lipids were compared in both groups. Results: Both groups were matched based on age (P = 0.10), sex (P = 0.789), BMI (P = 0.515), …

Comments On: In Vitro Efficacy Of Hyperbaric Oxygen Therapy Against Leishmania Tropica Promastigotes And Amastigotes, Yalçin Önem, Vedat Turhan

Turkish Journal of Medical Sciences

No abstract provided.

The Role Of Quantitative D-Dimer Levels In The Follow-Up And Differential Diagnosis Of Pulmonary Thromboembolism And Community-Acquired Pneumonia, Ayhan Varol, Nurdan Köktürk, Hati̇ce Kiliç, Müge Aydoğdu, Numan Nadi̇r Eki̇m

Turkish Journal of Medical Sciences

Aim: To identify the quantitative D-dimer levels in pulmonary thromboembolism (PTE) and hospitalized-community acquired pneumonia (CAP) patients, and to determine the alteration of D-dimer levels with anticoagulant or antibacterial therapy. It is not well known that the quantitative analysis of D-dimer has a role in the differential diagnosis of PTE from other diseases. Materials and methods: Serum D-dimer levels were measured and compared prospectively with a latex-enhanced immunoturbidimetric method at admission, before initiating any antibiotic or anticoagulant therapy and then at days 3, 10, and 30 of treatment in PTE and CAP patients. Results: A total of 80 patients (45 …

High Cerebrospinal Fluid Protein Level In West Nile Virus Ncephalitis: Report Of Five Cases, Oğuz Karabay, Nazan Tuna, Mehmet Yahyaoğlu, Gökçen Kayan

Turkish Journal of Medical Sciences

An outbreak of West Nile virus (WNV) occurred in Greece, Russia, and Turkey in 2010. We diagnosed 5 WNV encephalitis patients, who presented with high cerebrospinal fluid (CSF) protein level and encephalitis relevant symptoms in the last days of summer or in the first days of autumn. Here, we aimed to present a retrospective analysis of 5 WNV encephalitis cases in Turkey in terms of their clinical and laboratory findings.

Risk Factors For Mortality In Patients With Nosocomial Staphylococcus Aureus Bacteremia, Ali̇ye Baştuğ, Gülruhsar Yilmaz, Bi̇rcan Kayaaslan, Esragül Akinci, Hurrem Bodur

Turkish Journal of Medical Sciences

Bloodstream infections (BSIs) due to Staphylococcus aureus have become increasingly common in hospitals worldwide. The aim of this study was to evaluate the risk factors for mortality of nosocomial BSI due to S. aureus. Materials and methods: We analyzed risk factors for mortality of methicillin-resistant S. aureus (MRSA) and methicillin-susceptible S. aureus (MSSA) bacteremia in a prospective case control study in a 1196-bed tertiary referral medical center. Logistic regression analyses were used to determine risk factors and prognostic factors of mortality. Results: Between July 2006 and January 2009, 176 patients were identified with clinically significant and microbiologically confirmed nosocomial bacteremia …

Dynamics Of Envelope Evolution In Clade C Shiv-Infected Pig-Tailed Macaques During Disease Progression Analyzed By Ultra-Deep Pyrosequencing, For Yue Tso, Damien C. Tully, Sandra Gonzalez, Christopher Quince, On Ho, Patricia Polacino, Ruth M. Ruprecht, Shiu-Lok Hu, Charles Wood

Nebraska Center for Virology: Faculty Publications

Understanding the evolution of the human immunodeficiency virus type 1 (HIV-1) envelope during disease progression can provide tremendous insights for vaccine development, and simian-human immunodeficiency virus (SHIV) infection of nonhuman primate provides an ideal platform for such studies. A newly developed clade C SHIV, SHIV-1157ipd3N4, which was able to infect rhesus macaques, closely resembled primary HIV-1 in transmission and pathogenesis, was used to infect several pig-tailed macaques. One of the infected animals subsequently progressed to AIDS, whereas one remained a nonprogressor. The viral envelope evolution in the infected animals during disease progression was analyzed by a bioinformatics approach using ultra-deep …

Coxsackievirus B3 Infection Leads To The Generation Of Cardiac Myosin Heavy Chain-Α-Reactive Cd4 T Cells In A/J Mice, Arunakumar Gangaplara, Chandirasegaran Massilamany, Deborah M. Brown, Gustavo A. Delhon, Asit K. Pattnaik, Nora Chapman, Noel Rose, David J. Steffen, Jay Reddy

Jay Reddy Publications

Enteroviruses like coxsackievirus B3 (CVB3) are common suspects in myocarditis/dilated cardiomyopathy patients. Autoimmunity has been proposed as an underlying mechanism, but direct evidence of its role is lacking. To delineate autoimmune response in CVB3 myocarditis, we used IA^k dextramers for cardiac myosin heavy chain (Myhc)-α 334–352. We have demonstrated that myocarditis-susceptible A/J mice infected with CVB3 generate Myhc-α-reactive CD4 T cells and such a repertoire was absent in naïve mice as measured by proliferative response to Myhc-α 334–352 and IA^k dextramer staining. We also detected Myhc-α 334–352 dextramer⁺ cells in the hearts of CVB3-infected mice. The autoreactive …

Efficacy Of Infection Control Interventions In Reducing The Spread Of Multidrug-Resistant Organisms In The Hospital Setting, Joanna R. Wares, Erika M.C. D'Agata, Mary Ann Horn, Shigui Ruan, Glenn F. Webb

Department of Math & Statistics Faculty Publications

Multidrug-resistant organisms (MDRO) continue to spread in hospitals globally, but the population-level impact of recommended preventive strategies and the relative benefit of individual strategies targeting all MDRO in the hospital setting are unclear. To explore the dynamics of MDRO transmission in the hospital, we develop a model extending data from clinical individual-level studies to quantify the impact of hand hygiene, contact precautions, reducing antimicrobial exposure and screening surveillance cultures in decreasing the prevalence of MDRO colonization and infection. The effect of an ongoing increase in the influx of patients colonized with MDRO into the hospital setting is also quantified. We …

Reducing Hospital Infection Rates In The Burn Unit By Adherence To Infection Control Measures: A Six-Year Experience, Zülal Özkurt, Ülkü Altoparlak, Si̇bel İba Yilmaz, Serpi̇l Erol, Kemaletti̇n Özden, Müfi̇de Nuran Akçay

Turkish Journal of Medical Sciences

To show the effect of infection control measures (ICMs) on nosocomial infections (NIs) in a burn unit. Materials and methods: This study was conducted retrospectively at a 15-bed pediatric and adult burn unit, and 1329 hospitalized patients from 2003 to 2008 were enrolled. Detection and surveillance of NIs was performed by the infection control team (ICT), actively and prospectively, and was patient and laboratory based. Pan-resistant P. aeruginosa strains were seen in the unit in 2003. A periodical education program was applied by the ICT, and some changes were recommended. The hydrotherapy tank was abandoned, antimicrobials were used by the …

Investigation Of The In Vitro Activities Of Various Antibiotics Against Brucella Melitensis Strains, Onur Kaya, Füsun Zeynep Akçam, Güler Yayli

Turkish Journal of Medical Sciences

To assess the antimicrobial susceptibility of Brucella melitensis strains in our region. Brucellosis is a common disease in Turkey. Moreover, difficulties are encountered in the treatment process, such as long-lasting therapy, relapses, and side effects of drugs. Hence, novel treatment approaches and the susceptibility of current antibiotics are vital. Materials and methods: Thirty-four Brucella spp. isolated from blood samples of patients with brucellosis were included. Minimal inhibitory concentrations for tetracycline, rifampicin, streptomycin, ciprofloxacin, doxycycline, ceftriaxone, and levofloxacin were detected by broth microdilution. Results: Tetracycline had the lowest and streptomycin the highest MIC_{50} and MIC_{90} values, respectively. A total of 5 …

A Study On Molecular Characterization Of Macrolide Resistance Mechanism Among Isolates Of Streptococcus Pneumoniae From The Southern Marmara Region Of Turkey, As Well As Resistance To Macrolides And Penicillin In These Isolates, Cüneyt Özakin, Hi̇cran Güler, Emel Gürcüoğlu, Sali̇ha Bakir Özbey, Esra Kazak, Ayşe Melda Sinirtaş

Turkish Journal of Medical Sciences

To determine the distribution of macrolide resistance genes as well as resistance rates in isolated Streptococcus pneumoniae strains from the southern Marmara region of Turkey. Materials and methods: Antimicrobial resistance rates and MIC values were determined by the E-test method in 300 Streptococcus pneumoniae isolates that were isolated from clinical samples. Resistance genes were determined by the polymerase chain reaction (PCR) method in erythromycin-resistant strains. Results: It was found that 11.4% of Streptococcus pneumoniae isolates were resistant to macrolides. The penicillin MIC value was >=0.12 µg/mL in 23% of the strains and 2 µg/mL in 2% of the strains. The …