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https://www.readbyqxmd.com/read/28810858/rapid-and-sensitive-detection-of-canine-distemper-virus-by-real-time-reverse-transcription-recombinase-polymerase-amplification
#1
Jianchang Wang, Jinfeng Wang, Ruiwen Li, Libing Liu, Wanzhe Yuan
BACKGROUND: Canine distemper, caused by Canine distemper virus (CDV), is a highly contagious and fatal systemic disease in free-living and captive carnivores worldwide. Recombinase polymerase amplification (RPA), as an isothermal gene amplification technique, has been explored for the molecular detection of diverse pathogens. METHODS: A real-time reverse transcription RPA (RT-RPA) assay for the detection of canine distemper virus (CDV) using primers and exo probe targeting the CDV nucleocapsid protein gene was developed...
August 15, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28808938/advances-in-vaccines-to-prevent-viral-respiratory-illnesses-in-children
#2
Aleisha J Anderson, Tom L Snelling, Hannah C Moore, Christopher C Blyth
Childhood vaccination has played a critical role in the reduction of morbidity and mortality from communicable diseases, including specific respiratory pathogens. Acute lower respiratory infection (ALRI) of both bacterial and viral aetiology continues to impact global child health. Key bacterial pathogens including Streptococcus pneumoniae and Haemophilus influenza type b are specifically targeted with current vaccination programmes, while at present there are less effective strategies for the prevention of viral disease...
August 14, 2017: Paediatric Drugs
https://www.readbyqxmd.com/read/28772168/prevalence-and-seasonality-of-six-respiratory-viruses-during-five-consecutive-epidemic-seasons-in-belgium
#3
Kaat Ramaekers, Els Keyaerts, Annabel Rector, Annie Borremans, Kurt Beuselinck, Katrien Lagrou, Marc Van Ranst
BACKGROUND: Acute Respiratory Infections (ARIs) are a major health problem, especially in young children and the elderly. OBJECTIVES: Insights into the seasonality of respiratory viruses can help us understand when the burden on society is highest and which age groups are most vulnerable. STUDY DESIGN: We monitored six respiratory viruses during five consecutive seasons (2011-2016) in Belgium. Patient specimens (n=22876), tested for one or more of the following respiratory viruses, were included in this analysis: Influenza viruses (IAV & IBV), Human respiratory syncytial virus (hRSV), Human metapneumovirus (hMPV), Adenovirus (ADV) and Human parainfluenza virus (hPIV)...
July 23, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28763071/prevalence-of-respiratory-viruses-in-wheezing-children-not-older-than-24-months-of-age
#4
Martín Bedolla-Barajas, Hilda Montero, Jaime Morales-Romero, Adriana Landa-Cardeña, Jahaziel Díaz, Netzahualpilli Delgado-Figueroa, Luis Gustavo Orozco-Alatorre
INTRODUCTION: Wheezing in children not older than 24 months of age is a frequent event, and viruses are usually the causative agents. The aim of the study was to estimate the prevalence of respiratory viruses in wheezing children who were not older than 24 months of age and who had no history of asthma. METHODS: Fifty-five Mexican children were included in an analytical cross-sectional study. Nasal secretions were obtained by using sterile rayon-tipped applicators to identify the virus by polymerase chain reaction or reverse transcription-polymerase chain reaction: adenovirus, bocavirus, human rhinovirus, influenza virus type A, human metapneumovirus, parainfluenza, rhinovirus, and respiratory syncytial virus...
May 2017: Gaceta Médica de México
https://www.readbyqxmd.com/read/28757139/clinical-and-epidemiological-characteristics-of-human-parainfluenza-virus-infections-of-children-in-southern-taiwan
#5
Kai-Wen Wu, Shih-Min Wang, Ching-Fen Shen, Tzong-Shiann Ho, Jen-Ren Wang, Ching-Chuan Liu
BACKGROUND: Human parainfluenza viruses (HPIV) 1-4 had been analyzed as being one of the most frequent causes of hospitalizations for young children with respiratory tract illnesses. METHODS: This retrospective study was performed from children virologically confirmed as HPIV infection through throat swab or nasopharyngeal aspirates at a tertiary care university hospital, between January 2012 and December 2014. HPIV4 was not checked and analyzed, due to not include in the commercial kit...
June 22, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28750327/cholesterol-is-required-for-stability-and-infectivity-of-influenza-a-and-respiratory-syncytial-viruses
#6
Shringkhala Bajimaya, Tünde Frankl, Tsuyoshi Hayashi, Toru Takimoto
Cholesterol-rich lipid raft microdomains in the plasma membrane are considered to play a major role in the enveloped virus lifecycle. However, the functional role of cholesterol in assembly, infectivity and stability of respiratory RNA viruses is not fully understood. We previously reported that depletion of cellular cholesterol by cholesterol-reducing agents decreased production of human parainfluenza virus type 1 (hPIV1) particles by inhibiting virus assembly. In this study, we analyzed the role of cholesterol on influenza A virus (IAV) and respiratory syncytial virus (RSV) production...
July 24, 2017: Virology
https://www.readbyqxmd.com/read/28747497/the-genetic-stability-of-piv5-vectored-rsv-vaccine-candidates-after-in-vitro-and-in-vivo-passage
#7
Shannon I Phan, Carolyn M Adam, Zhenhai Chen, Michael Citron, Xiaoping Liang, Amy S Espeseth, Dai Wang, Biao He
Human respiratory syncytial virus (RSV) is the leading etiologic agent of lower respiratory tract infections in children, but no licensed vaccine exists. Previously, our laboratory developed two parainfluenza virus 5 (PIV5)-based RSV vaccine candidates that protect mice against RSV challenge. PIV5 was engineered to express either the RSV fusion protein (F) or the RSV major attachment glycoprotein (G) between the HN and L genes of the PIV5 genome [PIV5-RSV-F (HN-L) or PIV5-RSV-G (HN-L)]. To investigate the stability of the vaccine candidates in vitro, they were passaged in Vero cells at high and low multiplicities of infection (MOI) for eleven generations and the genome sequences, growth kinetics, and protein expression of the resulting viruses were compared with those of the parent viruses...
July 26, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28747496/parainfluenza-virus-5-piv5-expressing-wild-type-or-pre-fusion-respiratory-syncytial-virus-rsv-fusion-protein-protect-mice-and-cotton-rats-from-rsv-challenge
#8
Shannon I Phan, James R Zengel, Huiling Wei, Zhuo Li, Dai Wang, Biao He
Human respiratory syncytial virus (RSV) is the leading cause of pediatric bronchiolitis and hospitalizations. RSV can also cause severe complications in elderly and immunocompromised individuals. There is no licensed vaccine. We previously generated a PIV5-vectored vaccine candidate expressing the RSV fusion protein (F) that was immunogenic and protective in mice. In this work, our goal was to improve the original vaccine candidate by modifying the PIV5 vector or by modifying the RSV-F antigen. We previously demonstrated that inserting a foreign gene at the PIV5 SH-HN junction or deleting PIV5 SH increased vaccine efficacy...
July 26, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28742120/virus-induced-asthma-attack-the-importance-of-allergic-inflammation-in-response-to-viral-antigen-in-an-animal-model-of-asthma
#9
Christopher Skappak, Ramses Ilarraza, Ying-Qi Wu, Matthew G Drake, Darryl J Adamko
Asthma exacerbation can be a life-threatening condition, and is most often triggered by common respiratory viruses. Poor asthma control and worsening of respiratory function is associated with increased airway inflammation, including eosinophilia. Prevention of asthma exacerbation relies on treatment with corticosteroids, which preferentially inhibit allergic inflammation like eosinophils. Human studies demonstrate that inactivated virus can trigger eosinophil activation in vitro through antigen presentation and memory CD4+ lymphocytes...
2017: PloS One
https://www.readbyqxmd.com/read/28739424/respiratory-viruses-in-transplant-recipients-more-than-just-a-cold-clinical-syndromes-and-infection-prevention-principles
#10
REVIEW
Salma Abbas, Jillian E Raybould, Sangeeta Sastry, Oveimar de la Cruz
OBJECTIVES: The aim of this review is to provide updated information on the clinical spectrum, treatment options, and infection prevention strategies for respiratory viral infections (RVIs) in both solid organ (SOT) and hematopoietic stem cell transplant (HSCT) patients. METHODS: The MEDLINE and PubMed databases were searched for literature regarding the aforementioned aspects of RVIs, with focus on respiratory syncytial virus, adenovirus, influenza virus, parainfluenza virus, human metapneumovirus, and rhinovirus...
July 22, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28715293/surveillance-for-antibodies-against-six-canine-viruses-in-wild-raccoons-procyon-lotor-in-japan
#11
Emiko Aoki, Takehisa Soma, Mayumi Yokoyama, Makoto Matsubayashi, Kazumi Sasai
Raccoons (Procyon lotor) are found worldwide. They are frequently seen in crowded inner cities as well as in forests or wooded areas, often living in proximity to humans and their pets. We examined sera from 100 wild raccoons in Japan for antibodies to six canine viruses with veterinary significance to assess their potential as reservoirs. We also aimed to understand the distribution of potentially infected wildlife. We found that 7% of samples were seropositive for canine distemper virus (CDV), 10% for canine parvovirus type (CPV), 2% for canine adenovirus type 1, 6% for canine adenovirus type 2, and 7% for canine coronavirus...
July 17, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28714870/antiviral-lipopeptide-cell-membrane-interaction-is-influenced-by-peg-linker-length
#12
Marcelo T Augusto, Axel Hollmann, Matteo Porotto, Anne Moscona, Nuno C Santos
A set of lipopeptides was recently reported for their broad-spectrum antiviral activity against viruses belonging to the Paramyxoviridae family, including human parainfluenza virus type 3 and Nipah virus. Among them, the peptide with a 24-unit PEG linker connecting it to a cholesterol moiety (VG-PEG24-Chol) was found to be the best membrane fusion inhibitory peptide. Here, we evaluated the interaction of the same set of peptides with biomembrane model systems and isolated human peripheral blood mononuclear cells (PBMC)...
July 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28704440/viral-etiology-seasonality-and-severity-of-hospitalized-patients-with-severe-acute-respiratory-infections-in-the-eastern-mediterranean-region-2007-2014
#13
Katherine C Horton, Erica L Dueger, Amr Kandeel, Mohamed Abdallat, Amani El-Kholy, Salah Al-Awaidy, Abdul Hakim Kohlani, Hanaa Amer, Abel Latif El-Khal, Mayar Said, Brent House, Guillermo Pimentel, Maha Talaat
INTRODUCTION: Little is known about the role of viral respiratory pathogens in the etiology, seasonality or severity of severe acute respiratory infections (SARI) in the Eastern Mediterranean Region. METHODS: Sentinel surveillance for SARI was conducted from December 2007 through February 2014 at 20 hospitals in Egypt, Jordan, Oman, Qatar and Yemen. Nasopharyngeal and oropharyngeal swabs were collected from hospitalized patients meeting SARI case definitions and were analyzed for infection with influenza, respiratory syncytial virus (RSV), adenovirus (AdV), human metapneumovirus (hMPV) and human parainfluenza virus types 1-3 (hPIV1-3)...
2017: PloS One
https://www.readbyqxmd.com/read/28692356/benign-acute-childhood-myositis-secondary-to-parainfluenza-a-virus
#14
Siba P Paul, Gabriela Fillon, Paul A Heaton
No abstract text is available yet for this article.
July 2, 2017: British Journal of Hospital Medicine
https://www.readbyqxmd.com/read/28679075/first-report-of-immunohistochemical-detection-of-peste-des-petit-ruminants-parainfluenza-3-and-respiratory-syncytial-viral-antigens-in-lungs-of-nigerian-goats
#15
Theophilus Aghogho Jarikre, Benjamin Obukowho Emikpe
This study determined the of involvement of PPR, PI3, and RS viruses in the pathology of caprine pneumonia across Nigeria. 150 goats were selected randomly. PI3 and RSV monoclonal antibodies and PPR polyclonal antibody were used for the immunolocalization of the antigens. Histologically, 61 of the goats had broncho-interstitial pneumonia, 25 had interstitial pneumonia, 42 had bronchopneumonia, 12 had bronchiolitis, and 10 were normal. PPR, PI3, and RS viral antigens were demonstrated in: intact and desquamated bronchial, bronchiolar epithelial cells, macrophages, leukocytes, pneumocytes, and giant cells...
July 5, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28674426/the-impact-of-the-butterfly-effect-on-human-parainfluenza-virus-haemagglutinin-neuraminidase-inhibitor-design
#16
Larissa Dirr, Ibrahim M El-Deeb, Leonard M G Chavas, Patrice Guillon, Mark von Itzstein
Human parainfluenza viruses represent a leading cause of lower respiratory tract disease in children, with currently no available approved drug or vaccine. The viral surface glycoprotein haemagglutinin-neuraminidase (HN) represents an ideal antiviral target. Herein, we describe the first structure-based study on the rearrangement of key active site amino acid residues by an induced opening of the 216-loop, through the accommodation of appropriately functionalised neuraminic acid-based inhibitors. We discovered that the rearrangement is influenced by the degree of loop opening and is controlled by the neuraminic acid's C-4 substituent's size (large or small)...
July 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28674033/haemophilus-parainfluenzae-strain-atcc33392-forms-biofilms-in-vitro-and-during-experimental-otitis-media-infections
#17
Bing Pang, W Edward Swords
Haemophilus parainfluenzae is a nutritionally fastidious, Gram-negative bacterium with an oropharyngeal/nasopharyngeal carriage niche that is associated with a range of opportunistic infections, which include infectious endocarditis and otitis media (OM). These infections are often chronic/recurrent in nature and typically involve bacterial persistence within biofilm communities that are highly resistant to host clearance. This study addresses the primary hypothesis that H. parainfluenzae forms biofilm communities that are important determinants of persistence in vivo The results from in vitro biofilm studies confirmed that H...
July 3, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28673837/respiratory-viruses-detected-in-mexican-children-younger-than-5-years-old-with-community-acquired-pneumonia-a-national-multicenter-study
#18
Rosa María Wong-Chew, Miguel L García-León, Daniel E Noyola, Luis F Perez Gonzalez, Jesús Gaitan Meza, Alberto Vilaseñor-Sierra, Gerardo Martinez-Aguilar, Victor Hugo Rivera-Nuñez, Oscar A Newton-Sánchez, Verónica Firo-Reyes, Carlos N Del Río-Almendarez, Alejandra Pamela González-Rodríguez, Enrique R Ortiz-García, Susana Navarrete-Navarro, Carmen Soria-Rodríguez, Adoniram Carrasco-Castillo, Eneida Sánchez-Medina, Irma López-Martínez, Teresa Hernández-Andrade, Celia M Alpuche-Aranda, José I Santos-Preciado
BACKGROUND: Acute respiratory infections are the leading cause of mortality in children worldwide, especially in developing countries. Pneumonia accounts for 16% of all deaths of children under 5 years of age and was the cause of death of 935000 children in 2015. Despite its frequency and severity, information regarding its etiology is limited. The aim of this study was to identify respiratory viruses associated with community-acquired pneumonia (CAP) in children younger than 5 years old...
June 30, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28671295/characterization-of-the-nasopharyngeal-viral-microbiome-from-children-with-community-acquired-pneumonia-but-negative-for-luminex-xtag-respiratory-viral-panel-assay-detection
#19
Lili Xu, Yun Zhu, Lili Ren, Baoping Xu, Chunyan Liu, Zhengde Xie, Kunling Shen
In the present study, 50 nasopharyngeal swabs from children with community-acquired pneumonia (CAP) but negative for 18 common respiratory viruses, as measured by the Luminex xTAG Respiratory Viral Panel Assay, were subjected to multiplex metagenomic analyses using a next-generation sequencing platform. Taxonomic analysis showed that all sequence reads could be assigned to a specific species. An average of 95.13% were assigned to the Bacteria kingdom, whereas only 0.72% were potentially virus derived. This snapshot of the respiratory tract virome revealed most viral reads to be respiratory tract related, classified into four known virus families: Paramyxoviridae, Herpesviridae, Anelloviridae, and Polyomaviridae...
July 3, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28654867/cholesterol-rich-lipid-rafts-play-a-critical-role-in-bovine-parainfluenza-virus-type-3-bpiv3-infection
#20
Liyang Li, Liyun Yu, Xilin Hou
Lipid rafts are specialized lipid domains enriched in cholesterol and sphingolipid, which can be utilized in the lifecycle of numerous enveloped viruses. Bovine parainfluenza virustype3 (BPIV3) entry to cell is mediated by receptor binding and membrane fusion, but how lipid rafts in host cell membrane and BPIV3 envelope affect virus infection remains unclear. In this study, we investigated the role of lipid rafts in the different stages of BPIV3 infection. The MDBK cells were treated by methyl-β-cyclodextrin (MβCD) to disrupt cellular lipid raft, and the virus infection was determined...
May 11, 2017: Research in Veterinary Science
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