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https://www.readbyqxmd.com/read/29781755/more-robust-gut-immune-responses-induced-by-combining-intranasal-and-sublingual-routes-for-prime-boost-immunization
#1
Hye Suk Hwang, Sao Puth, Wenzhi Tan, Vivek Verma, Kwangjoon Jeong, Shee Eun Lee, Joon Haeng Rhee
Norovirus causes acute and debilitating gastroenteritis, characterized by vomiting and diarrhea. We recently reported a recombinant GII. 4 P domain particle (Pd) vaccine adjuvanted with a flagellin, Vibrio vulnificus FlaB, effectively promoting both humoral and cell-mediated immune responses. In the previous study, we found that sublingual (SL) immunization induced higher fecal secretory IgA (SIgA) responses while intranasal (IN) route provided higher amplitude of humoral and cellular immune responses in the systemic compartment...
May 21, 2018: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29781418/waterborne-outbreak-of-gastroenteritis-on-the-kwazulu-natal-coast-south-africa-december-2016-january-2017
#2
P G Sekwadi, K G Ravhuhali, A Mosam, V Essel, G M Ntshoe, A M Shonhiwa, K McCarthy, J Mans, M B Taylor, N A Page, N Govender
An unexpected increase in gastroenteritis cases was reported by healthcare workers on the KwaZulu-Natal Coast, South Africa, January 2017 with >600 cases seen over a 3-week period. A case-control study was conducted to identify the source and risk factors associated with the outbreak so as to recommend control and prevention measures. Record review identified cases and controls and structured-telephonic interviews were conducted to obtain exposure history. Stool specimens were collected from 20 cases along with environmental samples and both screened for enteric pathogens...
May 21, 2018: Epidemiology and Infection
https://www.readbyqxmd.com/read/29780224/correlative-study-between-c-reactive-protein-clinical-severity-and-nerve-conduction-studies-in-guillain-barr%C3%A3-syndrome
#3
Yosria A Altaweel, Sawsan Abdelaziz, Hala A Fathy, Shimaa AbdelBadea
Background: Guillain-Barre' syndrome (GBS) is a serious autoimmune disorder in which the immune system attacks healthy nerve cells of the peripheral nervous system causing polyradiculoneuropathy which leads to weakness, numbness, and tingling, and can eventually cause paralysis. Autoimmune conditions like GBS can induce a high level of inflammation resulting in an increase in the C-reactive protein( CRP) production. The aim of this study is to assess the relationship between CRP level and the clinical severity as well as the electrophysiological findings of nerve conduction studies in patients with GBS...
2018: Egypt J Neurol Psychiatr Neurosurg
https://www.readbyqxmd.com/read/29779487/expression-purification-and-characterization-of-a-gii-4-norovirus-protease
#4
Benjamin D Kuiper, Bradley J Keusch, Joshua Holcomb, Kendall M Muzzarelli, Franck Amblard, Peng Liu, Shaoman Zhou, Iulia A Kovari, Zhe Yang, Raymond F Schinazi, Ladislau C Kovari
BACKGROUND: Noroviruses are the leading cause of acute gastroenteritis worldwide. Norovirus proteases, which are responsible for cleavage of the viral polyprotein, have become an attractive drug target to treat norovirus infections. Genogroup II (GII) noroviruses are responsible for a majority of outbreaks; however, limited data exist regarding GII norovirus proteases. METHOD: The Minerva virus protease (MVpro), a genogroup II genotype 4 (GII.4) norovirus protease was expressed in E...
May 20, 2018: Infectious Disorders Drug Targets
https://www.readbyqxmd.com/read/29779228/prevalence-and-clinical-profile-of-rotavirus-a-infection-among-diarrheal-children-and-phylogenetic-analysis-with-vaccine-strains-in-chengdu-west-china-2009-2014
#5
Yu-Hang Chen, Fan Chen, Tao Zhou, Jia-Yi Chen, Tian-Li Zheng, Xin Xu, Xiao-Fang Pei
OBJECTIVES: Rotaviruses are the most common cause of severe diarrheal disease in young children. However, little is known about the epidemiological and clinical profile of rotavirus A (RVA) in diarrheal children or the efficacy of Lanzhou lamb rotavirus vaccine (LLR) in Chengdu, China. This study aimed to determine the prevalence and clinical profile of RVA in diarrheal children and provide gene analysis information for RVA vaccination programs. METHODS: 1121 fecal samples were collected from outpatient children with diarrhea between 2009 and 2014...
May 19, 2018: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/29772466/research-on-the-contamination-levels-of-norovirus-in-food-facilities-using-groundwater-in-south-korea-2015-2016
#6
Jeong Su Lee, In Sun Joo, Si Yeon Ju, Min Hee Jeong, Yun-Hee Song, Hyo Sun Kwak
Norovirus (NoV) is a major pathogenic virus that is responsible for foodborne and waterborne gastroenteritis outbreaks. Groundwater is an important source of drinking water and is used in agriculture and food manufacturing processes. This study investigated norovirus contamination of groundwater treatment systems at 1360 sites in seven metropolitan areas and nine provinces in 2015-2016. Temperature, pH, residual chlorine, and turbidity content were assessed to analyze the water quality. In 2015, six sites were positive for the presence of NoV (0...
May 11, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29772399/characterization-of-a-g10p-14-rotavirus-strain-from-a-diarrheic-child-in-thailand-evidence-for-bovine-to-human-zoonotic-transmission
#7
Ratana Tacharoenmuang, Satoshi Komoto, Ratigorn Guntapong, Tomihiko Ide, Phakapun Singchai, Sompong Upachai, Saori Fukuda, Yumika Yoshida, Takayuki Murata, Tetsushi Yoshikawa, Kriangsak Ruchusatsawat, Kazushi Motomura, Naokazu Takeda, Somchai Sangkitporn, Koki Taniguchi
An unusual rotavirus strain, DB2015-066 with the G10P[14] genotype (RVA/Human-wt/THA/dB2015-066/2015/G10P[14]), was detected in a stool sample from a child hospitalized with acute gastroenteritis in Thailand. Here, we sequenced and characterized the full-genome of the strain DB2015-066. On whole genomic analysis, strain DB2015-066 was shown to have a unique genotype constellation: G10-P[14]-I2-R2-C2-M2-A3-N2-T6-E2-H3. The backbone genes of this strain (I2-R2-C2-M2-A3-N2-T6-E2-H3) are commonly found in rotavirus strains from artiodactyls such as cattle...
May 14, 2018: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29770061/canadian-public-health-laboratory-network-position-statement-non-culture-based-diagnostics-for-gastroenteritis-and-implications-for-public-health-investigations
#8
B Berenger, L Chui, A R Reimer, V Allen, D Alexander, M-C Domingo, D Haldane, L Hoang, P Levett, A MacKeen, D Marcino, C Sheitoyan-Pesant, G Zahariadis
As clinical laboratories transition to using culture-independent detection test (CIDT) panels for cases of acute gastroenteritis, culture of clinical specimens is becoming less common. The reduction in bacterial cultures available for public health activities is expected to hinder surveillance and outbreak response by public health laboratories at the local, provincial, national and international levels. These recommendations are intended to serve as guidelines for the implementation of CIDT panels in frontline laboratories in Canada...
December 7, 2017: Canada Communicable Disease Report, Relevé des Maladies Transmissibles Au Canada
https://www.readbyqxmd.com/read/29769338/the-perk-arm-of-the-unfolded-protein-response-negatively-regulates-transmissible-gastroenteritis-virus-replication-by-suppressing-protein-translation-and-promoting-type-i-ifn-production
#9
Mei Xue, Fang Fu, Yanlong Ma, Xin Zhang, Liang Li, Li Feng, Pinghuang Liu
Coronavirus replication is closely associated with the endoplasmic reticulum (ER), the primary cellular organelle for protein synthesis, folding, and modification. ER stress is a common consequence in coronavirus-infected cells. However, how the virus-induced ER stress influences coronavirus replication and pathogenesis remains controversial. Here, we demonstrated that infection with the alphacoronavirus transmissible gastroenteritis virus (TGEV) induced ER stress and triggered the unfolded protein response (UPR) in vitro and in vivo , and ER stress negatively regulated TGEV replication in vitro Although TGEV infection activated all three UPR pathways (ATF6, IRE1, and PERK), the virus-triggered UPR suppressed TGEV replication in both ST and IPEC-J2 cells primarily through activation of the PERK-eIF2α axis, as shown by functional studies with overexpression, siRNA, or specific chemical inhibitors...
May 16, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29768564/meningitis-caused-by-salmonella-enterica-serotype-panama-in-brazil-first-case-reported
#10
Maria Regina Pires Carneiro, Maria Iracema de Aguiar Patrício, Sona Jain, Dalia Dos Prazeres Rodrigues, Sergio Eduardo Longo Fracalanzza
Salmonella infections usually occur as gastroenteritis that is generally self-limited. However, some serotypes of Salmonella can cause severe extra-intestinal infections, such as bacteremia and meningitis. Here, we report the first Salmonella Panama case of meningitis in 4-month-old male newborn in Brazil. The invasive strain isolated was susceptible to all antimicrobial agents tested. The genes agfA, fimA, invA, sfbA, phoP, and slyA were detected using polymerase chain reactions. These findings are relevant and physicians should be alert to the possibility of meningitis in newborns due to S...
March 2018: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29768293/seasonality-of-common-pediatric-infectious-diseases
#11
Susan C Lipsett, Michael C Monuteaux, Andrew M Fine
BACKGROUND/OBJECTIVE: Traditional sources cite seasonal patterns for common infectious diseases, often based on microbiologic data, but little is known about cyclical trends in clinically diagnosed infectious conditions in the emergency department (ED). We leveraged the publicly available Nationwide Emergency Department Sample database to measure the seasonality of the most common pediatric infectious diseases diagnosed in US EDs. METHODS: We searched the Nationwide Emergency Department Sample database to identify infectious diagnoses comprising at least 1% of all diagnosis codes ascribed to patients 21 years and younger in US EDs from 2009 to 2013...
May 15, 2018: Pediatric Emergency Care
https://www.readbyqxmd.com/read/29763968/binding-to-type-i-collagen-is-essential-for-the-infectivity-of-vibrio-parahaemolyticus-to-host-cells
#12
Ming Liu, Shanshan Yang, Chengkun Zheng, Xuesong Luo, Weicheng Bei, Peng Cai
Vibrio parahaemolyticus is a globally present marine bacterium that often leads to acute gastroenteritis. Two type III secretion systems (T3SSs), T3SS1 and T3SS2, are important for host infection. Type I collagen is a component of the extracellular matrix and is abundant in the small intestine. However, whether type I collagen serves as the cellular receptor for V. parahaemolyticus infection of host cells remains enigmatic. In this study, we discovered that type I collagen is not only important for the attachment of V...
May 15, 2018: Cellular Microbiology
https://www.readbyqxmd.com/read/29761045/porcine-rotavirus-c-in-pigs-with-gastroenteritis-on-thai-swine-farms-2011-2016
#13
Supansa Tuanthap, Cherdpong Phupolphan, Supol Luengyosluechakul, Ausanee Duang-In, Apiradee Theamboonlers, Suphot Wattanaphansak, Sompong Vongpunsawad, Alongkorn Amonsin, Yong Poovorawan
Swine are economically important food animals, but highly contagious porcine epidemic diarrhea virus (PEDV) and rotavirus can afflict pig herds and contribute significantly to piglet morbidity and mortality. While there have been studies on rotavirus group A (RVA) in Thailand, reports of rotavirus group C (RVC) are limited. Here, we aimed to identify the prevalence of RVC circulating on Thai commercial swine farms. We analyzed 769 feces and intestine mucosal contents of pigs affected with diarrhea between 2011 and 2016 using RT-PCR specific for the PEDV spike (S), rotavirus glycoprotein (G) VP7, and protease-sensitive protein (P) VP4 genes...
2018: PeerJ
https://www.readbyqxmd.com/read/29757707/universal-rotavirus-vaccination-program-in-sicily-reduction-in-health-burden-and-cost-despite-low-vaccination-coverage
#14
Claudio Costantino, Vincenzo Restivo, Fabio Tramuto, Alessandra Casuccio, Francesco Vitale
Rotavirus is considered the main cause of severe gastroenteritis and nosocomial infections in Pediatric units, especially during late winter and early spring season in temperate region. In 2013 Sicilian Region, for the first time in Italy, introduced universal Rotavirus vaccination. This study aims to estimate health and economic impact on rotavirus Gastroenteritis (RVGE) among children aged 0-59 months in Sicily, after rotavirus vaccine introduction. We analyzed hospital discharge records including a diagnosis of RVGE occurred from 1st January 2009 to 31st December 2016 among hospitalized children aged 0 to 59 months, residents in Sicily...
May 14, 2018: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29757352/evaluation-of-the-impact-of-a-rotavirus-vaccine-program-on-pediatric-acute-gastroenteritis-hospitalizations-estimating-the-overall-effect-attributable-to-the-program-as-a-whole-and-as-a-per-unit-change-in-rotavirus-vaccine-coverage
#15
Margaret K Doll, Caroline Quach, David L Buckeridge
Estimation of the overall effect of a vaccine program is essential, but the effect is typically estimated for a whole program. We estimate the overall effect of the Quebec rotavirus vaccine program launched in November 2011, and the effect for each 10% increase in rotavirus vaccine coverage on pediatric, all-cause acute gastroenteritis hospitalizations. We implemented negative binomial regressions adjusted for seasonality, long-term trends, and infection dynamics, to estimate the effect of the vaccine program as: 1) a dichotomous variable, representing program presence/absence, and linear term to account for changes in trend in the post-program period, or 2) a continuous variable, representing rotavirus vaccine coverage...
May 11, 2018: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29757148/mild-encephalitis-encephalopathy-with-a-reversible-splenial-lesion-in-children
#16
Adalet Elçin Yıldız, Hülya Maraş Genç, Esra Gürkaş, Havva Akmaz Ünlü, İbrahim Halil Öncel, Alev Güven
PURPOSE: We aimed to present clinical and radiologic characteristics of mild encephalitis/encephalopathy with a reversible splenial lesion (MERS) in children. METHODS: Eight children (5 boys and 3 girls; median age, 5.9 years; age range, 8 months to 14.1 years) diagnosed with MERS between September 2015 and June 2017 were included in the study. We reviewed the patient's data, including demographic characteristics, prodromal and neurologic symptoms, neurologic examination, magnetic resonance imaging and electroencephalography findings, laboratory findings, treatment, and prognosis...
March 2018: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/29755189/roles-of-the-crp-and-sipb-genes-of-salmonella-enterica-serovar-typhimurium-in-protective-efficacy-and-immune-responses-to-vaccination-in-mice
#17
Songbiao Chen, Chengshui Liao, Chunjie Zhang, Xiangchao Cheng
Salmonella enterica serovar Typhimurium has a wide host range and is capable of causing infections ranging from severe gastroenteritis to systemic infection in humans. To determine if attenuated S. Typhimurium strains can serve as safe and effective oral vaccines to prevent typhoid fever, the biologic characteristics of crp and sipB deletion mutants were evaluated. Previous studies had found that the crp and sipB genes are related to Salmonella pathogenicity. In this study, cytotoxicity, protective efficacy, and immune responses of the host were analyzed...
April 2018: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/29753872/molecular-and-biological-characterization-of-the-human-bovine-rotavirus-based-reassortant-rotavirus
#18
Ehsan Zafari, Hoorieh Soleimanjahi, Ashraf Mohammadi, Ali Teimoori, Homayon Mahravani
Rotaviruses (RV) are the leading cause of acute infantile gastroenteritis, associated with elevated mortality in low-income countries. Morbidity and mortality, length and rates of hospitalization due to RV gastroenteritis are dropping. Improving the quality of newborns life is an ongoing challenge for health-care providers. In this study, homemade reassortant human-bovine rotavirus was developed and biological activity and molecular characterization of candidate vaccine were evaluated for the vaccine stability...
May 10, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29753657/irf-1-rig-i-and-mda5-display-potent-antiviral-activities-against-norovirus-coordinately-induced-by-different-types-of-interferons
#19
Wen Dang, Lei Xu, Yuebang Yin, Sunrui Chen, Wenshi Wang, Mohamad S Hakim, Kyeong-Ok Chang, Maikel P Peppelenbosch, Qiuwei Pan
Norovirus represents the main cause of acute nonbacterial gastroenteritis worldwide. In immunocompromised patients, it bears high risk of causing chronic infection with significant morbidity and mortality. The lack of specific treatment prompts the development of anti-norovirus agents. In this study, we have investigated the role of interferon (IFN) response and evaluated antiviral activities of different IFNs against human norovirus (HuNoV) replication using a HuNoV replicon model. We found that HuNoV RNA replication was sensitive to all types of IFNs, including IFNα (type I), IFNγ (type II), IFNλ1 and 3 (type III)...
May 10, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29753103/genetic-diversity-of-human-sapovirus-across-the-americas
#20
Marta Diez-Valcarce, Christina J Castro, Rachel L Marine, Natasha Halasa, Holger Mayta, Mayuko Saito, Laura Tsaknaridis, Chao-Yang Pan, Filemon Bucardo, Sylvia Becker-Dreps, Maria Renee Lopez, Laura Cristal Magaña, Terry Fei Fan Ng, Jan Vinjé
BACKGROUND: Sapoviruses are responsible for sporadic and epidemic acute gastroenteritis worldwide. Sapovirus typing protocols have a success rate as low as 43% and relatively few complete sapovirus genome sequences are available to improve current typing protocols. OBJECTIVE/STUDY DESIGN: To increase the number of complete sapovirus genomes to better understand the molecular epidemiology of human sapovirus and to improve the success rate of current sapovirus typing methods, we used deep metagenomics shotgun sequencing to obtain the complete genomes of 68 sapovirus samples from four different countries across the Americas (Guatemala, Nicaragua, Peru and the US)...
May 6, 2018: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
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