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Hongwei Yao, Myungwoon Lee, Shu Y Liao, Mei Hong
The fusion peptide (FP) and transmembrane domain (TMD) of viral fusion proteins play important roles during virus-cell membrane fusion, by inducing membrane curvature and transient dehydration. The structure of the water-soluble ectodomain of viral fusion proteins has been extensively studied crystallographically, but the structures of the FP and TMD bound to phospholipid membranes are not well understood. We recently investigated the conformations and lipid interactions of the separate FP and TMD peptides of the parainfluenza virus 5 (PIV5) fusion protein F using solid-state NMR...
October 21, 2016: Biochemistry
E Faure, O Cannesson, G Schurtz, A Coisne, A Vincentelli, K Faure, B Guery
No abstract text is available yet for this article.
October 17, 2016: Médecine et Maladies Infectieuses
Ko Sato, Oshi Watanabe, Suguru Ohmiya, Fumiko Chiba, Masahiro Hayashi, Tamio Suzuki, Kazuyoshi Kawakami, Hidekazu Nishimura
Isolation of human parainfluenza virus (HPIV) serotypes 1 and 3 from clinical specimens is not very efficient due to the lack of a cell culture system capable of cytopathic effect (CPE). In this study, we demonstrated the utility of a melanoma cell line, MNT-1, that allows HPIV growth and displays CPE. Particularly, the isolation efficiencies of HPIV1 and HPIV3 using MNT-1 were higher than those of cell lines conventionally used for HPIV isolation. Our demonstrated efficacy of HPIV1 and HPIV3 isolation with apparent CPE using the MNT-1 cell culture system would improve the virus isolation from the clinical specimens...
October 20, 2016: Microbiology and Immunology
Prawin Kumar, Guruprasad R Medigeshi, Vishnu S Mishra, Mojahidul Islam, Shivani Randev, Aparna Mukherjee, Rama Chaudhry, Arti Kapil, Kana Ram Jat, Rakesh Lodha, Sushil K Kabra
BACKGROUND: There is paucity of studies on etiology of acute respiratory infections (ARI) in infants. OBJECTIVE: To document incidence and etiology of ARI in infants, their seasonal variability and association of clinical profile with etiology. MATERIAL AND METHODS: A birth cohort was followed for the first year of life; for each episode of ARI, nasopharyngeal aspirates were collected to identify the causative respiratory virus/es using multiplex real time PCR assay...
October 6, 2016: Pediatric Infectious Disease Journal
Hui Pan, Binglin Cui, Yuanchun Huang, Jiacai Yang, William Ba-Thein
BACKGROUND: Nasal colonization with bacterial pathogens is associated with risk of invasive respiratory tract infections, but the related information for Chinese healthy children is scarce. METHODS: This cross-sectional study was conducted with healthy children from 6 kindergartens in the Chaoshan region, southern China during 2011-2012. Nasal swabs were examined for five common bacterial pathogens: Streptococcus pneumoniae, Haemophilus influenzae, Haemophilus parainfluenzae, Moraxella catarrhalis, and Staphylococcus aureus...
September 30, 2016: BMC Pediatrics
J L Denson, J L Kennedy, W N Dehority, M M Eickman, K S Schwalm, A N Stoner, J C Kincaid, T J Abramo, T M Thompson, E M Ulloa, S W Burchiel, S A Young, D L Dinwiddie
Using target capture of viral nucleic acid and next-generation sequencing, we generated the complete genomes of two novel human parainfluenza virus 1 isolates. Isolates AR001 (accession no. KX570602) and NM001 (accession no. KX639498) were collected 3 months apart from pediatric patients with acute respiratory infection from Arkansas and New Mexico, respectively.
October 13, 2016: Genome Announcements
Shaun K Morris, Lisa G Pell, Mohammed Ziaur Rahman, Michelle C Dimitris, Abdullah Mahmud, M Munirul Islam, Tahmeed Ahmed, Eleanor Pullenayegum, Tahmid Kashem, Shaila S Shanta, Jonathan Gubbay, Eszter Papp, Michelle Science, Stanley Zlotkin, Daniel E Roth
BACKGROUND: Early infancy is a high-risk period for severe acute respiratory infection (ARI), particularly in low-income countries with resource-limited health systems. Lower respiratory tract infection (LRTI) is commonly preceded by upper respiratory infection (URTI), and often caused by respiratory syncytial virus (RSV), influenza and other common community-acquired viral pathogens. Vitamin D status is a candidate modifiable early-life determinant of the host antiviral immune response and thus may influence the risk of ARI-associated morbidity in high-risk populations...
October 13, 2016: BMC Pregnancy and Childbirth
Howard Faden, Vincent Callanan, Michael Pizzuto, Mark Nagy, Mark Wilby, Daryl Lamson, Brian Wrotniak, Stefan Juretschko, Kirsten St George
BACKGROUND: Airway obstruction due to enlargement of tonsils and adenoids is a common pediatric problem resulting in sleep disordered breathing. The cause for the relatively abnormal growth of tonsils and adenoids is poorly understood. METHODS: Non-acutely ill children undergoing tonsillectomy and adenoidectomy (T&A) for various reasons were enrolled prospectively in a study to determine the frequency of asymptomatic respiratory viral infections in each lymphoid tissue and to relate the number and types of virus to the degree of airway obstruction...
November 2016: International Journal of Pediatric Otorhinolaryngology
Richard L Hodinka
Acute upper and lower respiratory infections are a major public health problem and a leading cause of morbidity and mortality worldwide. At greatest risk are young children, the elderly, the chronically ill, and those with suppressed or compromised immune systems. Viruses are the predominant cause of respiratory tract illnesses and include RNA viruses such as respiratory syncytial virus, influenza virus, parainfluenza virus, metapneumovirus, rhinovirus, and coronavirus. Laboratory testing is required for a reliable diagnosis of viral respiratory infections, as a clinical diagnosis can be difficult since signs and symptoms are often overlapping and not specific for any one virus...
August 2016: Microbiology Spectrum
Hyun Jung Kwak, Dong Won Park, Jee Eun Kim, Min Kyung Park, Gun Woo Koo, Tai Sun Park, Ji-Yong Moon, Tae Hyung Kim, Jang Won Sohn, Ho Joo Yoon, Dong Ho Shin, Sang-Heon Kim
Exacerbations of chronic obstructive pulmonary disease (COPD) lead to high morbidity and mortality. Respiratory virus infection is considered as one of the important causes of COPD exacerbations. The aim of this study was to assess the prevalence of respiratory virus infection in COPD exacerbations and to find the factors associated with susceptibility to viral infections. Furthermore, we tried to examine if COPD exacerbations caused by viral infections have more severe clinical outcomes in comparison with those with non-viral causes...
2016: Tohoku Journal of Experimental Medicine
Tatyana V Spichak, Svetlana B Yatsyshina, Lubov К Кatosova, Svetlana S Кim, Matti O Korppi
: The role that rhinoviruses, enteroviruses, parainfluenza viruses, coronaviruses and human bocavirus play in pediatric pneumonia is insufficiently studied. We used polymerase chain reaction (PCR) to study 9 virus groups, including 16 different viruses or viral strains, in 56 ambulatory children with radiologically confirmed community-acquired pneumonia (CAP). The same tests were carried out on 474 apparently healthy control children of the same age and sex. The mean age of children with CAP was 6...
October 6, 2016: European Journal of Pediatrics
M A G Rabbani, Michael Ribaudo, Ju-Tao Guo, Sailen Barik
: A major arm of cellular innate immunity is type I interferon (IFN), represented by IFN-α and IFN-β. Type I IFN transcriptionally induces a large number of cellular genes, collectively known as IFN-Stimulated Genes or ISGs, which act as antivirals. The IFIT (interferon-induced proteins with tetratricopeptide repeats)-family proteins constitute a major subclass of ISG, and are characterized by multiple tetratricopeptide repeats (TPRs). Here, we have interrogated IFIT proteins for their ability to inhibit the growth of human parainfluenza virus type 3 (PIV3), a nonsegmented negative-strand RNA virus of the Paramyxoviridae family and major cause of respiratory disease in children...
October 5, 2016: Journal of Virology
Marko Pokorn, Monika Jevšnik, Miroslav Petrovec, Andrej Steyer, Tatjana Mrvič, Štefan Grosek, Lara Lusa, Franc Strle
The majority of children with febrile seizures have viral infections and viruses were detected in 22% to 63% of children in published studies. Using molecular methods, viruses were also detected in asymptomatic persons. A prospective study was conducted to detect respiratory and enteric viruses in 192 children with febrile seizures and compare the detection rates to those found in 156 healthy age-matched controls. A respiratory or enteric virus was detected in 72.9% of children with febrile seizures and in 51...
October 3, 2016: Journal of Child Neurology
J T Richeson, J A Carroll, N C Burdick Sanchez, N D May, H D Hughes, S L Roberts, P R Broadway, K P Sharon, M A Ballou
Our objective was to examine immunosuppression induced by dexamethasone (DEX) administration in cattle on immunological responses to a multivalent respiratory vaccine containing replicating and nonreplicating agents. Steers ( = 32; 209 ± 8 kg) seronegative to infectious bovine rhinotracheitis virus (IBRV), bovine viral diarrhea virus (BVDV), bovine respiratory syncytial virus (BRSV), and parainfluenza-3 virus (PI3V) were stratified by BW and randomly assigned to 1 of 3 treatments: 1) acute immunosuppression (ACU; 0...
August 2016: Journal of Animal Science
Lauren P McLaughlin, Haili Lang, Elizabeth Williams, Kaylor E Wright, Allison Powell, Conrad R Cruz, Anamaris M Colberg-Poley, Cecilia Barese, Patrick J Hanley, Catherine M Bollard, Michael D Keller
BACKGROUND AIMS: Human parainfluenza virus-3 (HPIV) is a common cause of respiratory infection in immunocompromised patients and currently has no effective therapies. Virus-specific T-cell therapy has been successful for the treatment or prevention of viral infections in immunocompromised patients but requires determination of T-cell antigens on targeted viruses. METHODS: HPIV3-specific T cells were expanded from peripheral blood of healthy donors using a rapid generation protocol targeting four HPIV3 proteins...
September 27, 2016: Cytotherapy
A A Chughtai, Q Wang, T C Dung, C R Macintyre
We compared the rates of fever in adult subjects with laboratory-confirmed influenza and other respiratory viruses and examined the factors that predict fever in adults. Symptom data on 158 healthcare workers (HCWs) with a laboratory-confirmed respiratory virus infection were collected using standardized data collection forms from three separate studies. Overall, the rate of fever in confirmed viral respiratory infections in adult HCWs was 23·4% (37/158). Rates varied by virus: human rhinovirus (25·3%, 19/75), influenza A virus (30%, 3/10), coronavirus (28·6%, 2/7), human metapneumovirus (28·6%, 2/7), respiratory syncytial virus (14·3%, 4/28) and parainfluenza virus (8·3%, 1/12)...
October 3, 2016: Epidemiology and Infection
Marie von Lilienfeld-Toal, Annemarie Berger, Maximilian Christopeit, Marcus Hentrich, Claus Peter Heussel, Jana Kalkreuth, Michael Klein, Matthias Kochanek, Olaf Penack, Elke Hauf, Christina Rieger, Gerda Silling, Maria Vehreschild, Thomas Weber, Hans-Heinrich Wolf, Nicola Lehners, Enrico Schalk, Karin Mayer
BACKGROUND: Community acquired viruses (CRVs) may cause severe disease in cancer patients. Thus, efforts should be made to diagnose CRV rapidly and manage CRV infections accordingly. METHODS: A panel of 18 clinicians from the Infectious Diseases Working Party of the German Society for Haematology and Medical Oncology have convened to assess the available literature and provide recommendations on the management of CRV infections including influenza, respiratory syncytial virus, parainfluenza virus, human metapneumovirus and adenovirus...
November 2016: European Journal of Cancer
P Benson Ham, Brice Hwang, Linda J Wise, K Christian Walters, Walter L Pipkin, Charles G Howell, Jatinder Bhatia, Robyn Hatley
Conventional treatment of respiratory failure involves positive pressure ventilation that can worsen lung damage. Extracorporeal membrane oxygenation (ECMO) is typically used when conventional therapy fails. In this study, we evaluated the use of venovenous (VV)-ECMO for the treatment of severe pediatric respiratory failure at our institution. A retrospective analysis of pediatric patients (age 1-18) placed on ECMO in the last 15 years (1999-2014) by the pediatric surgery team for respiratory failure was performed...
September 2016: American Surgeon
Alicia B Mitchell, Bassel Mourad, Euan Tovey, Lachlan Buddle, Matthew Peters, Lucy Morgan, Brian G Oliver
Respiratory viruses are very common in the community and contribute to the burden of illness for patients with chronic respiratory diseases, including acute exacerbations. Traditional sampling methods are invasive and problematic to repeat. Accordingly, we explored whether respiratory viruses could be isolated from disposable spirometry filters and whether detection of viruses in this context represented presence in the upper or lower respiratory tract. Discovery (n  =  53) and validation (n  =  49) cohorts were recruited from a hospital outpatient department during two different time periods...
2016: Journal of Breath Research
Sylvia Taylor, Pio Lopez, Lily Weckx, Charissa Borja-Tabora, Rolando Ulloa-Gutierrez, Eduardo Lazcano-Ponce, Angkool Kerdpanich, Miguel Angel Rodriguez Weber, Abiel Mascareñas de Los Santos, Juan-Carlos Tinoco, Marco Aurelio P Safadi, Fong Seng Lim, Marcela Hernandez-de Mezerville, Idis Faingezicht, Aurelio Cruz-Valdez, Yang Feng, Ping Li, Serge Durviaux, Gerco Haars, Sumita Roy-Ghanta, David W Vaughn, Terry Nolan
BACKGROUND: Better population data on respiratory viruses in children in tropical and southern hemisphere countries is needed. METHODS: The epidemiology of respiratory viruses among healthy children (6 months to <10 years) with influenza-like illness (ILI) was determined in a population sample derived from an influenza vaccine trial (NCT01051661) in 17 centers in eight countries (Australia, South East Asia and Latin America). Active surveillance for ILI was conducted for approximately 1 year (between February 2010 and August 2011), with PCR analysis of nasal and throat swabs...
September 22, 2016: Journal of Infection
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