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https://www.readbyqxmd.com/read/27931678/diagnosing-tuberculosis-in-the-21st-century-dawn-of-a-genomics-revolution
#1
REVIEW
Christopher Jeanes, Justin O'Grady
Tuberculosis (TB) ranks alongside HIV as the leading cause of death worldwide, killing 1.5million people in 2014. Traditional laboratory techniques do not provide sufficiently rapid results to inform clinicians on appropriate treatment, especially in the face of increasingly prevalent drug-resistant TB. Rapid molecular methods such as PCR and LAMP are vital tools in the fight against TB, however, rapid advances in next generation sequencing (NGS) technology are allowing increasingly rapid and accurate sequencing of entire bacterial genomes at ever decreasing cost, providing unprecedented depth of information...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27931339/mobility-patterns-of-persons-at-risk-for-drug-resistant-tuberculosis-in-mumbai-india
#2
E Conners, R S Garfein, T C Rodwell, Z F Udwadia, D G Catanzaro
SETTING: Tuberculosis (TB) hospital in Mumbai, India. OBJECTIVE: To describe the mobility patterns of persons with suspected drug-resistant tuberculosis (DR-TB) and to assess whether there were significant differences in demographic or risk characteristics based on mobility. DESIGN: Observational cohort study of TB clinic patients at risk for DR-TB. RESULTS: Among 602 participants, 37% had ever moved from their place of birth; 14% were local movers (within state), and 23% were distant movers, between states or countries...
December 2016: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/27930607/counseling-framework-for-hiv-serodiscordant-couples-on-the-integrated-use-of-antiretroviral-therapy-and-pre-exposure-prophylaxis-for-hiv-prevention
#3
Jennifer F Morton, Connie Celum, John Njoroge, Agnes Nakyanzi, Imeldah Wakhungu, Edna Tindimwebwa, Snaidah Ongachi, Eric Sedah, Emmanuel Okwero, Kenneth Ngure, Josephine Odoyo, Nulu Bulya, Jessica E Haberer, Jared M Baeten, Renee Heffron
BACKGROUND: For HIV-serodiscordant couples, integrated delivery of antiretroviral therapy (ART) for HIV-positive partners and time-limited pre-exposure prophylaxis (PrEP) for negative partners virtually eliminates HIV transmission. Standardized messaging, sensitive to the barriers and motivators to HIV treatment and prevention, is needed for widespread scale-up of this approach. METHODS: Within the Partners Demonstration Project, a prospective interventional project among 1013 serodiscordant couples in Kenya and Uganda, we offered ART to eligible HIV-positive partners and PrEP to HIV-negative partners before ART initiation and through the HIV-positive partner's first 6 months of ART use...
January 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27930093/kir-gene-content-diversity-in-a-zimbabwean-population-does-kir2dl2-have-a-role-in-protection-against-human-immunodeficiency-virus-infection
#4
Kudakwashe Mhandire, Lynn Sodai Zijenah, Louis-Marie Yindom, Kerina Duri, Tommy Mlambo, Mqondisi Tshabalala, Lovemore Ronald Mazengera, Doreen Zvipo Mhandire, Cuthbert Musarurwa, Collet Dandara, Sarah Rowland-Jones, Hilda Tendisa Matarira, Babill Stray-Pedersen
Killer cell immunoglobulin-like receptors (KIRs) mediate natural killer cell function through interaction with their cognate human leukocyte antigen ligands. Thus, KIR gene variants have been implicated in resistance or susceptibility to viral infections. However, research on the role of these variants remains contradictory and inconclusive. In the present study, we investigated KIR gene content diversity and its association with human immunodeficiency virus (HIV) infection in an adult Black Zimbabwean population...
December 2016: Omics: a Journal of Integrative Biology
https://www.readbyqxmd.com/read/27929247/initial-management-of-patients-with-hiv-infection
#5
Ronald H Goldschmidt, Carolyn Chu, Betty J Dong
Human immunodeficiency virus (HIV) infection has become a treatable chronic disease with near-normal life expectancy when patients receive antiretroviral therapy (ART). Family physicians and other primary care clinicians commonly provide long-term comprehensive care for persons with HIV infection. This article describes the scope of initial care, including obtaining a thorough history; physical examination for HIV-associated manifestations; attention to HIV-specific immunization schedules; routine and HIV-specific laboratory evaluation; and ensuring standard health care maintenance to prevent HIV- and non-HIV-related morbidity and mortality...
November 1, 2016: American Family Physician
https://www.readbyqxmd.com/read/27928075/detecting-mutations-in-the-mycobacterium-tuberculosis-pyrazinamidase-gene-pnca-to-improve-infection-control-and-decrease-drug-resistance-rates-in-human-immunodeficiency-virus-coinfection
#6
Matthew Z Dudley, Patricia Sheen, Robert H Gilman, Eduardo Ticona, Jon S Friedland, Daniela E Kirwan, Luz Caviedes, Richard Rodriguez, Lilia Z Cabrera, Jorge Coronel, Louis Grandjean, David A J Moore, Carlton A Evans, Luz Huaroto, Víctor Chávez-Pérez, Mirko Zimic
Hospital infection control measures are crucial to tuberculosis (TB) control strategies within settings caring for human immunodeficiency virus (HIV)-positive patients, as these patients are at heightened risk of developing TB. Pyrazinamide (PZA) is a potent drug that effectively sterilizes persistent Mycobacterium tuberculosis bacilli. However, PZA resistance associated with mutations in the nicotinamidase/pyrazinamidase coding gene, pncA, is increasing. A total of 794 patient isolates obtained from four sites in Lima, Peru, underwent spoligotyping and drug resistance testing...
December 7, 2016: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/27928004/the-effect-of-hiv-1-env-on-serinc5-antagonism
#7
Saina Beitari, Shilei Ding, Qinghua Pan, Andrés Finzi, Chen Liang
: SERINC5 is able to restrict HIV-1 infection by drastically impairing the infectivity of viral particles. Current studies have shown that HIV-1 Nef protein counters SERINC5 through down regulating SERINC5 from the cell surface and preventing virion incorporation of SERINC5. In addition, the Env proteins of some HIV-1 strains can also overcome SERINC5 inhibition. However, it is unclear how HIV-1 Env does so and why HIV-1 has two mechanisms to resist SERINC5 inhibition. Results of this study show that neither Env nor Nef prevents high-level ectopic SERINC5 from incorporation into HIV-1 particles, except that Env, but not Nef, is able to resist the inhibition of virion-associated SERINC5...
December 7, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27927856/the-long-term-mortality-of-tuberculosis-meningitis-patients-in-new-york-city-a-cohort-study
#8
Christopher Vinnard, Liza King, Sonal Munsiff, Aldo Crossa, Kentaro Iwata, Jotam Pasipanodya, Douglas Proops, Shama Ahuja
BACKGROUND: Tuberculosis meningitis (TBM) is the most devastating clinical presentation of infection with M. tuberculosis; delayed initiation of effective anti-tuberculosis (TB) therapy is associated with poor treatment outcomes. Our objective was to determine the relationship between drug resistance and 10-year mortality among TBM patients. METHODS: We conducted a retrospective cohort study of 324 patients with culture-confirmed TBM, susceptibility results reported for isoniazid and rifampin, and initiation of at least two anti-TB drugs, reported to the TB registry in New York City, NY (US) between January 1, 1992 and December 31, 2001...
December 7, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/27923946/prevalence-of-antiretroviral-drug-resistance-in-patients-who-are-not-responding-to-protease-inhibitor-based-treatment-results-from-the-first-national-survey-in-south-africa
#9
K Steegen, M Bronze, M A Papathanasopoulos, G van Zyl, D Goedhals, C Van Vuuren, W Macleod, I Sanne, W S Stevens, S C Carmona
Limited data exist on human immunodeficiency virus type 1 (HIV-1) resistance in patients who are not responding to protease inhibitor (PI)-based regimens in resource-limited settings. This study assessed resistance profiles in adults across South Africa who were not responding to PI-based regimens. pol sequencing was undertaken and submitted to the Stanford HIV Drug Resistance Database. At least 1 major PI mutation was detected in 16.4% of 350 participants. A total of 53.4% showed intermediate resistance to darunavir/ritonavir, whereas high-level resistance was not observed...
December 15, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27923009/counseling-framework-for-hiv-serodiscordant-couples-on-the-integrated-use-of-antiretroviral-therapy-and-pre-exposure-prophylaxis-for-hiv-prevention
#10
Jennifer F Morton, Connie Celum, John Njoroge, Agnes Nakyanzi, Imeldah Wakhungu, Edna Tindimwebwa, Snaidah Ongachi, Eric Sedah, Emmanuel Okwero, Kenneth Ngure, Josephine Odoyo, Nulu Bulya, Jessica E Haberer, Jared M Baeten, Renee Heffron
BACKGROUND: For HIV-serodiscordant couples, integrated delivery of antiretroviral therapy (ART) for HIV-positive partners and time-limited pre-exposure prophylaxis (PrEP) for negative partners virtually eliminates HIV transmission. Standardized messaging, sensitive to the barriers and motivators to HIV treatment and prevention, is needed for widespread scale-up of this approach. METHODS: Within the Partners Demonstration Project, a prospective interventional project among 1013 serodiscordant couples in Kenya and Uganda, we offered ART to eligible HIV-positive partners and PrEP to HIV-negative partners before ART initiation and through the HIV-positive partner's first 6 months of ART use...
January 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27919899/pharmacokinetic-evaluation-of-darunavir-administered-once-or-twice-daily-in-combination-with-ritonavir-or-the-three-direct-acting-antiviral-regimen-of-ombitasvir-paritaprevir-ritonavir-and-dasabuvir-in-adults-co-infected-with-hepatitis-c-and-human-immunodeficiency
#11
Jennifer R King, Amit Khatri, Roger Trinh, Rolando M Viani, Bifeng Ding, Jiuhong Zha, Rajeev Menon
BACKGROUND: The three-direct acting antiviral (3D) regimen containing ombitasvir, paritaprevir, ritonavir and dasabuvir ± ribavirin (RBV) is approved for treatment of HCV GT1/HIV-1 co-infection. Results of a pharmacokinetic substudy of 3D and darunavir are presented. METHODS: HCV/HIV-1 infected subjects were randomized to maintain a darunavir 800 mg once daily (QD) or switch to a darunavir 600 mg twice daily (BID) based antiretroviral regimen. On Study Day 1, subjects received 3D and RBV plus darunavir for 12 weeks...
December 5, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27919079/receptor-usage-dictates-hiv-1-restriction-by-human-trim5%C3%AE-in-dendritic-cell-subsets
#12
Carla M S Ribeiro, Ramin Sarrami-Forooshani, Laurentia C Setiawan, Esther M Zijlstra-Willems, John L van Hamme, Wikky Tigchelaar, Nicole N van der Wel, Neeltje A Kootstra, Sonja I Gringhuis, Teunis B H Geijtenbeek
The most prevalent route of HIV-1 infection is across mucosal tissues after sexual contact. Langerhans cells (LCs) belong to the subset of dendritic cells (DCs) that line the mucosal epithelia of vagina and foreskin and have the ability to sense and induce immunity to invading pathogens. Anatomical and functional characteristics make LCs one of the primary targets of HIV-1 infection. Notably, LCs form a protective barrier against HIV-1 infection and transmission. LCs restrict HIV-1 infection through the capture of HIV-1 by the C-type lectin receptor Langerin and subsequent internalization into Birbeck granules...
December 7, 2016: Nature
https://www.readbyqxmd.com/read/27918612/generalized-semiparametric-varying-coefficient-model-for-longitudinal-data-with-applications-to-adaptive-treatment-randomizations
#13
Li Qi, Yanqing Sun, Peter B Gilbert
This article investigates a generalized semiparametric varying-coefficient model for longitudinal data that can flexibly model three types of covariate effects: time-constant effects, time-varying effects, and covariate-varying effects. Different link functions can be selected to provide a rich family of models for longitudinal data. The model assumes that the time-varying effects are unspecified functions of time and the covariate-varying effects are parametric functions of an exposure variable specified up to a finite number of unknown parameters...
December 5, 2016: Biometrics
https://www.readbyqxmd.com/read/27915307/diversity-and-antifungal-drug-susceptibility-of-cryptococcus-isolates-in-thailand
#14
Navaporn Worasilchai, Marut Tangwattanachuleeporn, Kornvalee Meesilpavikkai, Claudia Folba, Mourine Kangogo, Uwe Groß, Michael Weig, Oliver Bader, Ariya Chindamporn
Yeasts of the Cryptococcus species complex are the causative agent of cryptococcosis, especially in human immunodeficiency virus (HIV) positive individuals. Cerebral or disseminated cryptococcosis has a very high mortality rate worldwide, including in Thailand. Additionally, an increasing rate of antifungal drug resistant cryptococcal isolates has been reported in several neighboring countries, complicating therapeutic approaches. To understand the situation of this infection in Thailand, we retrospectively investigated the molecular epidemiology and antifungal drug resistance in a collection of 74 clinical, 52 environmental and two veterinary isolates using the URA5-RFLP for typing and the EUCAST guideline for susceptibility testing...
December 3, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/27915018/design-and-surface-immobilization-of-short-anti-biofilm-peptides
#15
Biswajit Mishra, Tamara Lushnikova, Radha M Golla, Xiuqing Wang, Guangshun Wang
: Short antimicrobial peptides are essential to keep us healthy and their lasting potency can inspire the design of new types of antibiotics. This study reports the design of a family of eight-residue tryptophan-rich peptides (TetraF2W) obtained by converting the four phenylalanines in temporin-SHf to tryptophans. The temporin-SHf template was identified from the antimicrobial peptide database (http://aps.unmc.edu/AP). Remarkably, the double arginine variant (TetraF2W-RR) was more effective in killing methicillin-resistant Staphylococcus aureus (MRSA) USA300, but less cytotoxic to human skin HaCat and kidney HEK293 cells, than the lysine-containing dibasic combinations (KR, RK and KK)...
November 30, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27914856/occult-hiv-1-drug-resistance-to-thymidine-analogues-following-failure-of-first-line-tenofovir-combined-with-a-cytosine-analogue-and-nevirapine-or-efavirenz-in-sub-saharan-africa-a-retrospective-multi-centre-cohort-study
#16
John Gregson, Pontiano Kaleebu, Vincent C Marconi, Cloete van Vuuren, Nicaise Ndembi, Raph L Hamers, Phyllis Kanki, Christopher J Hoffmann, Shahin Lockman, Deenan Pillay, Tulio de Oliveira, Nathan Clumeck, Gillian Hunt, Bernhard Kerschberger, Robert W Shafer, Chunfu Yang, Elliot Raizes, Rami Kantor, Ravindra K Gupta
BACKGROUND: HIV-1 drug resistance to older thymidine analogue nucleoside reverse transcriptase inhibitor drugs has been identified in sub-Saharan Africa in patients with virological failure of first-line combination antiretroviral therapy (ART) containing the modern nucleoside reverse transcriptase inhibitor tenofovir. We aimed to investigate the prevalence and correlates of thymidine analogue mutations (TAM) in patients with virological failure of first-line tenofovir-containing ART...
November 30, 2016: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/27914855/time-to-get-serious-with-hiv-1-resistance-in-sub-saharan-africa
#17
Josep M Llibre
No abstract text is available yet for this article.
November 30, 2016: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/27913840/finding-direction-in-the-search-for-selection
#18
Grant Thiltgen, Mario Dos Reis, Richard A Goldstein
Tests for positive selection have mostly been developed to look for diversifying selection where change away from the current amino acid is often favorable. However, in many cases we are interested in directional selection where there is a shift toward specific amino acids, resulting in increased fitness in the species. Recently, a few methods have been developed to detect and characterize directional selection on a molecular level. Using the results of evolutionary simulations as well as HIV drug resistance data as models of directional selection, we compare two such methods with each other, as well as against a standard method for detecting diversifying selection...
December 2, 2016: Journal of Molecular Evolution
https://www.readbyqxmd.com/read/27911718/attacking-hiv-1-rna-versus-dna-by-sequence-specific-approaches-rnai-versus-crispr-cas
#19
REVIEW
Elena Herrera-Carrillo, Ben Berkhout
Human immunodeficiency virus type 1 (HIV-1) infection can be effectively controlled by potent antiviral drugs, but this never results in a cure. The patient should therefore take these drugs for the rest of his/her life, which can cause drug-resistance and adverse effects. Therefore, more durable therapeutic strategies should be considered, such as a stable gene therapy to protect the target T cells against HIV-1 infection. The development of potent therapeutic regimens based on the RNA interference (RNAi) and clustered regularly interspaced short palindromic repeats (CRISPR-Cas) mechanisms will be described, which can be delivered by lentiviral vectors...
October 15, 2016: Biochemical Society Transactions
https://www.readbyqxmd.com/read/27911140/effect-of-secondary-preventive-therapy-on-recurrence-of-tuberculosis-in-hiv-infected-individuals-a-systematic-review
#20
Wassilis Sc Bruins, Frank van Leth
Human immunodeficiency virus (HIV)-infected individuals successfully treated for tuberculosis (TB) remain at risk of recurrence of the disease, especially in high TB incidence settings. We performed a systematic review, investigating whether secondary preventive therapy (sPT) with anti-TB drugs (preventive therapy in former TB patients with treatment success) is an effective strategy to prevent recurrence of TB in this patient group. We searched the databases PubMed, Cochrane Library, EMBASE, Web of Science and Google Scholar using the keywords HIV-infections, HIV, human immunodeficiency virus, AIDS, isoniazid, isoniazid preventive therapy (IPT), tuberculosis, TB, recurrence and recurrent disease, resulting in 253 potential publications...
December 2, 2016: Infectious Diseases
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