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https://www.readbyqxmd.com/read/28895867/markedly-different-immune-responses-and-virus-kinetics-in-littermates-infected-with-porcine-circovirus-type-2-or-porcine-parvovirus-type-1
#1
Tanja Opriessnig, Priscilla F Gerber, Shannon R Matzinger, Xiang-Jin Meng, Patrick G Halbur
Porcine parvovirus type 1 (PPV1) and porcine circovirus type 2 (PCV2) are small single-stranded DNA viruses with high prevalence in the global pig population. The aim of this study was to compare and contrast PCV2 and PPV1 infections in high-health status pigs and to describe PCV2 long-term infection dynamics. Six caesarian-derived colostrum-deprived pigs were randomly divided into two groups and were experimentally infected with PCV2 or PPV1 at 5 weeks of age. All pigs had detectable viremia by day (D) 3 post-infection...
September 2017: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/28880197/short-course-of-postoperative-hepatitis-b-immunoglobulin-plus-antivirals-prevents-reinfection-of-liver-transplant-recipients
#2
Kavita Radhakrishnan, Aileen Chi, David J Quan, John P Roberts, Norah A Terrault
BACKGROUND: Hepatitis B immune globulin (HBIG) has been an integral component of prophylaxis against hepatitis B virus (HBV) recurrence in liver transplantation (LT) recipients, but HBIG is costly and inconvenient to administer, prompting consideration of alternative regimens. METHODS: In this retrospective cohort, we report on the success of antiviral therapy combined with a short course (in hospital only) HBIG in liver transplant recipients with HBV DNA less than 100 IU/mL pre-LT...
September 2017: Transplantation
https://www.readbyqxmd.com/read/28864951/time-course-of-cellular-hiv-dna-and-low-level-hiv-viremia-in-hiv-hcv%C3%A2-co-infected-patients-whose-hcv-infection-had-been-successfully-treated-with-directly-acting-antivirals
#3
Saverio G Parisi, Samantha Andreis, Monica Basso, Silvia Cavinato, Renzo Scaggiante, Marzia Franzetti, Massimo Andreoni, Giorgio Palù, Anna Maria Cattelan
This longitudinal study described cellular HIV-DNA changes and their correlation with HIV low-level plasma viremia (LLV) in HIV-HCV co-infected patients on successful antiretroviral and anti-HCV therapy by treatment with direct-acting antivirals (DAA). Thirty-nine patients were examined prior to the start of DAA (T0), after week 12 (T1) and 24 weeks (T2) of anti-HCV therapy. Cellular PBMC HIV-DNA was analysed as an absolute value and as the percentage of increase or decrease from T0 to T2. Patients were classified as having undetectable plasma HIV viraemia (UV) or LLV in the year before the start of anti-HCV treatment and within the T0-T2 study period...
September 1, 2017: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/28859639/longitudinal-study-of-senecavirus-a-shedding-in-sows-and-piglets-on-a-single-united-states-farm-during-an-outbreak-of-vesicular-disease
#4
Steven J P Tousignant, Laura Bruner, Jake Schwartz, Fabio Vannucci, Stephanie Rossow, Douglas G Marthaler
BACKGROUND: The study highlights the shedding pattern of Senecavirus A (SVA) during an outbreak of vesicular disease in a sow farm from the South-central Minnesota, USA. In this study, 34 individual, mixed parity sows with clinical signs of vesicular lesions and 30 individual piglets from 15 individual litters from sows with vesicular lesions were conveniently selected for individual, longitudinal sampling. Serum, tonsil, rectal, and vesicular swabs were collected on day1 post outbreak, and then again at 1, 2, 3, 4, 6, and 9 weeks post outbreak...
August 31, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28842263/screening-of-an-fda-approved-compound-library-identifies-levosimendan-as-a-novel-anti-hiv-1-agent-that-inhibits-viral-transcription
#5
Tsuyoshi Hayashi, Maxime Jean, Huachao Huang, Sydney Simpson, Netty G Santoso, Jian Zhu
Combination antiretroviral therapy (cART) has been proven to efficiently inhibit ongoing replication of human immunodeficiency virus type 1 (HIV-1), and significantly improve the health outcome in patients of acquired immune deficiency syndrome (AIDS). However, cART is unable to cure HIV-1/AIDS. Even in presence of cART there exists a residual viremia, contributed from the viral reservoirs of latently infected HIV-1 proviruses; this constitutes a major hurdle. Currently, there are multiple strategies aimed at eliminating or permanently silence these HIV-1 latent reservoirs being intensely explored...
August 24, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28842185/early-diagnosis-of-pi3k%C3%AE-syndrome-in-a-2-years-old-girl-with-recurrent-otitis-and-enlarged-spleen
#6
F Saettini, M A Pelagatti, D Sala, D Moratto, S Giliani, R Badolato, A Biondi
Heterozygous gain of function mutations in the gene encoding p110δ subunit of PI3K have been recently associated with activated PI3K-δ syndrome (APDS), a novel combined immune deficiency characterized by recurrent sinopulmonary infections, lymphopenia, reduced class-switched memory B cells, lymphadenopathy, CMV and/or EBV viremia and EBV-related lymphoma. Here we report a dominant gain of function PIK3CD mutation (E1021K) in a patient presenting with recurrent otitis media, massive splenomegaly, and persistent EBV-viraemia...
August 31, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28835775/commutability-and-concordance-of-four-hepatitis-b-virus-dna-assays-in-an-international-multicenter-study
#7
Benjamin Maasoumy, Birgit Bremer, Patrick Lehmann, Ed G Marins, Véronique Michel-Treil, Christian O Simon, Merlin Njoya, Markus Cornberg, Ellen Paxinos, Michael P Manns, Johannes Vermehren, Christoph Sarrazin, Ji Yeon Sohn, Yunjung Cho, Heiner Wedemeyer
BACKGROUND: HBV DNA is the most important molecular marker in hepatitis B, used to determine treatment indication and monitoring. Most patients require lifelong hepatitis B virus (HBV) management, thus viral load (VL) monitoring may be performed at different laboratories, with different HBV assays, which may result in different VL results. This multicenter study compares the commutability and concordance of results from four different HBV DNA assays: CAP/CTM HBVv2, HPS/CTM HBVv2 and the new cobas 6800/8800 HBV and cobas 4800 HBV assays...
August 2017: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/28830393/evaluation-of-hiv-dna-and-inflammatory-markers-in-hiv-infected-individuals-with-different-viral-load-patterns
#8
Francesca Falasca, Daniele Di Carlo, Corrado De Vito, Isabella Bon, Gabriella d'Ettorre, Alessandra Fantauzzi, Ivano Mezzaroma, Caterina Fimiani, Maria Carla Re, Vincenzo Vullo, Guido Antonelli, Ombretta Turriziani
BACKGROUND: Persistent residual viremia (RV) and low grade inflammation and immune activation have been associated with non-AIDS defining events. The impact of persistent RV and HIV-DNA load on immune activation/inflammation remains unclear. The purpose of this study was to gain new insights into the relation between viremia, markers of inflammation and HIV-DNA levels. METHODS: Three hundred and twenty-one HIV-infected patients were studied. A retrospective analysis of viremia values, prospectively collected for 48 months, was performed...
August 22, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28791125/nkg2c-memory-like-nk-cells-contribute-to-the-control-of-hiv-viremia-during-primary-infection-optiprim-anrs-147
#9
Françoise Gondois-Rey, Antoine Chéret, Samuel Granjeaud, Françoise Mallet, Ghislain Bidaut, Camille Lécuroux, Mickaël Ploquin, Michaela Müller-Trutwin, Christine Rouzioux, Véronique Avettand-Fenoël, Alessandro Moretta, Gilles Pialoux, Cécile Goujard, Laurence Meyer, Daniel Olive
Natural-killer (NK) cells are important immune effectors during a viral infection. Latent CMV infection is widely spread and was demonstrated to shape the NK cell repertoire through the NKG2C receptor. An expansion of NKG2C(+) NK cells has been reported during primary HIV infection (PHI), but their role is not known. We previously found a correlation between the maturation state of the NK cell compartment and a lower viral load by studying patients from the ANRS 147 Optiprim trial. We investigated here extensively the NKG2C(+) NK cells at the time of PHI and its evolution after 3 months of early antiretroviral therapy (combination antiretroviral therapy (cART))...
July 2017: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28780631/gbv-c-hiv-1-coinfection-is-associated-with-low-hiv-1-viral-load-and-high-cd4-t-lymphocyte-count
#10
Bárbara Katharine Barbosa de Miranda, Keyla Santos Guedes de Sá, Andrea Nazaré Rangel da Silva, Rosimar Neris Martins Feitosa, Izaura Maria Vieira Cayres-Vallinoto, Ricardo Ishak, Antonio Carlos Rosário Vallinoto
GB virus C (GBV-C) is a lymphotropic virus with a low level or non-existent replication in the liver. The interaction between HIV-1 and GBV-C apparently reduces the progression of HIV-1 infection to AIDS and improves the quality of life of HIV-1 infected individuals. A cross-sectional study was established to determine the possible effect of HIV-1/GBV-C coinfection on HIV-1 viral load and CD4(+) T lymphocyte counts. Samples from 313 HIV-1 infected persons from the Virus Laboratory of the Federal University of Pará as well as demographic and clinical information were obtained from medical records...
August 5, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28759651/rare-hiv-1-transmitted-founder-lineages-identified-by-deep-viral-sequencing-contribute-to-rapid-shifts-in-dominant-quasispecies-during-acute-and-early-infection
#11
Gustavo H Kijak, Eric Sanders-Buell, Agnes-Laurence Chenine, Michael A Eller, Nilu Goonetilleke, Rasmi Thomas, Sivan Leviyang, Elizabeth A Harbolick, Meera Bose, Phuc Pham, Celina Oropeza, Kultida Poltavee, Anne Marie O'Sullivan, Erik Billings, Melanie Merbah, Margaret C Costanzo, Joanna A Warren, Bonnie Slike, Hui Li, Kristina K Peachman, Will Fischer, Feng Gao, Claudia Cicala, James Arthos, Leigh A Eller, Robert J O'Connell, Samuel Sinei, Lucas Maganga, Hannah Kibuuka, Sorachai Nitayaphan, Mangala Rao, Mary A Marovich, Shelly J Krebs, Morgane Rolland, Bette T Korber, George M Shaw, Nelson L Michael, Merlin L Robb, Sodsai Tovanabutra, Jerome H Kim
In order to inform the rational design of HIV-1 preventive and cure interventions it is critical to understand the events occurring during acute HIV-1 infection (AHI). Using viral deep sequencing on six participants from the early capture acute infection RV217 cohort, we have studied HIV-1 evolution in plasma collected twice weekly during the first weeks following the advent of viremia. The analysis of infections established by multiple transmitted/founder (T/F) viruses revealed novel viral profiles that included: a) the low-level persistence of minor T/F variants, b) the rapid replacement of the major T/F by a minor T/F, and c) an initial expansion of the minor T/F followed by a quick collapse of the same minor T/F to low frequency...
July 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28750738/dengue-virus-evades-aav-mediated-neutralizing-antibody-prophylaxis-in-rhesus-monkeys
#12
Diogo M Magnani, Michael J Ricciardi, Varian K Bailey, Martin J Gutman, Núria Pedreño-Lopez, Cassia G T Silveira, Helen S Maxwell, Aline Domingues, Lucas Gonzalez-Nieto, Qin Su, Ruchi M Newman, Melissa Pack, Mauricio A Martins, José M Martinez-Navio, Sebastian P Fuchs, Eva G Rakasz, Todd M Allen, Stephen S Whitehead, Dennis R Burton, Guangping Gao, Ronald C Desrosiers, Esper G Kallas, David I Watkins
Development of vaccines against mosquito-borne Flaviviruses is complicated by the occurrence of antibody-dependent enhancement (ADE), which can increase disease severity. Long-term delivery of neutralizing antibodies (nAbs) has the potential to effectively block infection and represents an alternative to vaccination. The risk of ADE may be avoided by using prophylactic nAbs harboring amino acid mutations L234A and L235A (LALA) in the immunoglobulin G (IgG) constant region. Here, we used recombinant adeno-associated viruses (rAAVs) to deliver the anti-dengue virus 3 (DENV3) nAb P3D05...
July 24, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28750322/longitudinal-sequencing-of-hiv-1-infected-patients-with-low-level-viremia-for-years-while-on-art-shows-no-indications-for-genetic-evolution-of-the-virus
#13
Leen Vancoillie, Laura Hebberecht, Kenny Dauwe, Els Demecheleer, Sylvie Dinakis, Dries Vaneechoutte, Virginie Mortier, Chris Verhofstede
HIV-infected patients on antiretroviral therapy (ART) may present low-level viremia (LLV) above the detection level of current viral load assays. In many cases LLV is persistent but does not result in overt treatment failure or selection of drug resistant viral variants. To elucidate whether LLV reflects active virus replication, we extensively sequenced pol and env genes of the viral populations present before and during LLV in 18 patients and searched for indications of genetic evolution. Maximum likelihood phylogenetic trees were inspected for temporal structure both visually and by linear regression analysis of root-to-tip and pairwise distances...
October 2017: Virology
https://www.readbyqxmd.com/read/28749266/epidemiologic-evaluation-of-elephant-endotheliotropic-herpesvirus-3b-infection-in-an-african-elephant-loxodonta-africana
#14
Ellen Bronson, Michael McClure, Jennifer Sohl, Ellen Wiedner, Sherry Cox, Erin M Latimer, Virginia R Pearson, Gary S Hayward, Angela Fuery, Paul D Ling
This epidemiologic study follows a 5-yr-old male African elephant ( Loxodonta africana ) during an episode of hemorrhagic disease (HD) due to elephant endotheliotropic herpesvirus 3B (EEHV3B) utilizing data from complete blood counts, electrophoresis and acute phase protein analysis, and polymerase chain reaction (PCR) of multiple body fluids during and after the clinical episode. The elephant presented with sudden onset of marked lethargy and inappetence followed by hypersalivation, hyperemia of the conjunctivae and focally on the tongue, and swellings on the head and ventrum...
June 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28729879/safety-and-immunogenicity-of-the-quadrivalent-human-papillomavirus-qhpv-vaccine-in-hiv-positive-spanish-men-who-have-sex-with-men-msm
#15
Carmen Hidalgo-Tenorio, Jessica Ramírez-Taboada, Concepción Gil-Anguita, Javier Esquivias, Mohamed Omar-Mohamed-Balgahata, Antonio SamPedro, Miguel Lopez-Ruz, Juan Pasquau
BACKGROUND: Safety and immunogenicity of the quadrivalent human papillomavirus (qHPV) vaccine were evaluated in HIV-positive Spanish MSM. The prevalence of High Squamous Intraepithelial Lesions (HSIL) and genotypes of high-risk human papillomavirus (HR-HPV) were also determined, as well as risk factors associated with the presence of HR-HPV in anal mucosa. METHODS: This is a randomised, double blind, placebo-controlled trial of the quadrivalent HPV (qHPV) vaccine...
2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28722808/an-examination-of-the-effect-of-aerosolized-permanone-insecticide-on-zebra-finch-susceptibility-to-west-nile-virus
#16
Mark D Jankowski, Murray E Moore, Erik K Hofmeister
West Nile virus is primarily maintained cryptically primarily in avian (Passerine) populations where it is transmitted by Culex spp. mosquitoes. Mosquito control measures currently include physical activities to reduce mosquito breeding sites, the application of mosquito larvicides, or aerosolized insecticides to kill adults (adulticides) when arboviral diseases such as West Nile virus (WNV) or Zika virus are detected in mosquito populations. Organochlorine, organohosphorus, carbamate and pyrethroid insecticides are often used...
July 19, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28720147/safety-and-immunogenicity-of-the-quadrivalent-human-papillomavirus-qhpv-vaccine-in-hiv-positive-spanish-men-who-have-sex-with-men-msm
#17
Carmen Hidalgo-Tenorio, Jessica Ramírez-Taboada, Concepción Gil-Anguita, Javier Esquivias, Mohamed Omar-Mohamed-Balgahata, Antonio SamPedro, Miguel Lopez-Ruz, Juan Pasquau
BACKGROUND: Safety and immunogenicity of the quadrivalent human papillomavirus (qHPV) vaccine were evaluated in HIV-positive Spanish MSM. The prevalence of High Squamous Intraepithelial Lesions (HSIL) and genotypes of high-risk human papillomavirus (HR-HPV) were also determined, as well as risk factors associated with the presence of HR-HPV in anal mucosa. METHODS: This is a randomised, double blind, placebo-controlled trial of the quadrivalent HPV (qHPV) vaccine...
July 18, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28716893/which-dengue-vaccine-approach-is-the-most-promising-and-should-we-be-concerned-about-enhanced-disease-after-vaccination-there-is-only-one-true-winner
#18
Scott B Halstead
The scientific community now possesses information obtained directly from human beings that makes it possible to understand why breakthrough-enhanced dengue virus (DENV) infections occurred in children receiving Sanofi Pasteur's Dengvaxia tetravalent live attenuated vaccine and to predict the possibility of breakthrough-enhanced DENV infections following immunization with two other tetravalent live attenuated vaccines now in phase III testing. Based upon recent research, Dengvaxia, lacking DENV nonstructural protein antigens, did not protect seronegatives because it failed to raise a competent T-cell response and/or antibodies to NS1...
July 17, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28694811/latent-cytomegalovirus-cmv-infection-does-not-detrimentally-alter-t-cell-responses-in-the-healthy-old-but-increased-latent-cmv-carriage-is-related-to-expanded-cmv-specific-t-cells
#19
Sarah E Jackson, George X Sedikides, Georgina Okecha, Emma L Poole, John H Sinclair, Mark R Wills
Human cytomegalovirus (HCMV) primary infection and periodic reactivation of latent virus is generally well controlled by T-cell responses in healthy people. In older donors, overt HCMV disease is not generally seen despite the association of HCMV infection with increased risk of mortality. However, increases in HCMV DNA in urine of older people suggest that, although the immune response retains functionality, immunomodulation of the immune response due to lifelong viral carriage may alter its efficacy. Viral transcription is limited during latency to a handful of viral genes and there is both an IFNγ and cellular IL-10 CD4(+) T-cell response to HCMV latency-associated proteins...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28683645/substitution-of-nevirapine-or-raltegravir-for-protease-inhibitor-vs-rosuvastatin-treatment-for-the-management-of-dyslipidaemia-in-hiv-infected-patients-on-stable-antiretroviral-therapy-nevrast-study
#20
Leonardo Calza, Eleonora Magistrelli, Vincenzo Colangeli, Marco Borderi, Linda Bussini, Isabella Bon, Maria Carla Re, Pierluigi Viale
OBJECTIVES: An observational, prospective, cohort study was performed to compare efficacy and safety of a switch from ritonavir-boosted protease inhibitor (PI/r) to nevirapine or raltegravir with that of rosuvastatin addition to current antiretroviral therapy in HIV-infected patients with hyperlipidaemia. METHODS: All HIV-infected patients receiving a stable PI/r-based antiretroviral regimen, with persistently suppressed viremia, naïve to non-nucleoside analogues and to integrase strand transfer inhibitors, with mixed hyperlipidaemia, and who underwent a switch from PI/r to nevirapine (Group A) or raltegravir (Group B) or who started rosuvastatin at 10 mg daily (group C) with unchanged antiretroviral regimen were enrolled into the study...
July 6, 2017: Infectious Diseases
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