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Flaccid paralysis

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https://www.readbyqxmd.com/read/28322333/squamous-epitheliotropism-of-enterovirus-a71-in-human-epidermis-and-oral-mucosa
#1
Win Kyaw Phyu, Kien Chai Ong, Chee Kwan Kong, Abdul Khalil Alizan, Tindivanam Muthurangam Ramanujam, Kum Thong Wong
Hand-foot-and-mouth disease is a self-limiting paediatric infectious disease commonly caused by Enterovirus A71 (Genus: Enterovirus, Family: Picornaviridae). Typical lesions in and around the hands, feet, oral cavity and other places may rarely be complicated by acute flaccid paralysis and acute encephalomyelitis. Although virus is readily cultured from skin vesicles and oral secretions, the cellular target/s of Enterovirus A71 in human skin and oral mucosa are unknown. In Enterovirus A71-infected human skin and oral mucosa organotypic cultures derived from the prepuce and lip biopsies, focal viral antigens and viral RNA were localized to cytoplasm of epidermal and mucosal squamous cells as early as 2 days post-infection...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28296078/botulinum-neurotoxin-type-b-uses-a-distinct-entry-pathway-mediated-by-cdc42-into-intestinal-cells-versus-neuronal-cells
#2
Chloé Connan, Marie Voillequin, Carolina Varela Chavez, Christelle Mazuet, Christian Leveque, Sandrine Vitry, Alain Vandewalle, Michel R Popoff
Botulinum neurotoxins (BoNTs) are responsible for severe flaccid paralysis by inhibiting the release of acetylcholine at the neuromuscular junctions. BoNT/B most often induces mild forms of botulism with predominant dysautonomic symptoms. In food borne botulism and botulism by intestinal colonization such as infant botulism, which are the most frequent naturally acquired forms of botulism, the digestive tract is the main entry route of BoNTs into the organism. We previously showed that BoNT/B translocates through mouse intestinal barrier by an endocytosis-dependent mechanism and subsequently targets neuronal cells, mainly cholinergic neurons, in the intestinal mucosa and musculosa...
March 11, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28295026/neuronal-entry-and-high-neurotoxicity-of-botulinum-neurotoxin-a-require-its-n-terminal-binding-sub-domain
#3
Jiafu Wang, Jianghui Meng, Marc Nugent, Minhong Tang, J Oliver Dolly
Botulinum neurotoxins (BoNTs) are the most toxic proteins known, due to inhibiting the neuronal release of acetylcholine and causing flaccid paralysis. Most BoNT serotypes target neurons by binding to synaptic vesicle proteins and gangliosides via a C-terminal binding sub-domain (HCC). However, the role of their conserved N-terminal sub-domain (HCN) has not been established. Herein, we created a mutant form of recombinant BoNT/A lacking HCN (rAΔHCN) and showed that the lethality of this mutant is reduced 3...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28283677/guillain-barr%C3%A3-syndrome-presenting-with-sinus-node-dysfunction-and-refractory-shock
#4
Le Dung Ha, Farrukh Abbas, Mohan Rao
BACKGROUND Guillain-Barré syndrome (GBS) is an acute inflammatory demyelinating polyneuropathy that is usually associated with preceding respiratory or gastrointestinal infection and has the hallmark manifestation of ascending flaccid paralysis. We report an atypical presentation of GBS. CASE REPORT A 76-year-old male presented with acute onset of diaphoresis and altered mental status. He subsequently developed severe bradycardia and refractory hypotension, which initially responded to dopamine infusion. A temporary pacemaker wire was placed to stabilize the heart rate but hypotension persisted...
March 11, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28283373/dynamics-affecting-the-risk-of-silent-circulation-when-oral-polio-vaccination-is-stopped
#5
J S Koopman, C J Henry, J H Park, M C Eisenberg, E L Ionides, J N Eisenberg
Waning immunity could allow transmission of polioviruses without causing poliomyelitis by promoting silent circulation (SC). Undetected SC when oral polio vaccine (OPV) use is stopped could cause difficult to control epidemics. Little is known about waning. To develop theory about what generates SC, we modeled a range of waning patterns. We varied both OPV and wild polio virus (WPV) transmissibility, the time from beginning vaccination to reaching low polio levels, and the infection to paralysis ratio (IPR)...
March 1, 2017: Epidemics
https://www.readbyqxmd.com/read/28282873/crystal-structure-of-the-receptor-binding-domain-of-botulinum-neurotoxin-type-ha-also-known-as-type-fa-or-h
#6
Guorui Yao, Kwok-Ho Lam, Kay Perry, Jasmin Weisemann, Andreas Rummel, Rongsheng Jin
Botulinum neurotoxins (BoNTs), which have been exploited as cosmetics and muscle-disorder treatment medicines for decades, are well known for their extreme neurotoxicity to humans. They pose a potential bioterrorism threat because they cause botulism, a flaccid muscular paralysis-associated disease that requires immediate antitoxin treatment and intensive care over a long period of time. In addition to the existing seven established BoNT serotypes (BoNT/A-G), a new mosaic toxin type termed BoNT/HA (aka type FA or H) was reported recently...
March 8, 2017: Toxins
https://www.readbyqxmd.com/read/28278415/paediatric-active-enhanced-disease-surveillance-inaugural-annual-report-2014
#7
Yvonne A Zurynski, Jocelynne E McRae, Helen E Quinn, Nicholas J Wood, Kristine K Macartney
INTRODUCTION: The Paediatric Active Enhanced Disease Surveillance (PAEDS) network is a hospital-based active surveillance system employing prospective case ascertainment of selected uncommon vaccine preventable diseases and potential adverse events following immunisation (AEFI). PAEDS enhances other Australian surveillance systems by providing prospective detailed clinical and laboratory data for the same child. METHODS: Specialist surveillance nurses screen hospital admissions, emergency department records, laboratory and other data, to prospectively identify hospitalised children aged under 15 years in 5 paediatric tertiary referral hospitals in New South Wales, Victoria, South Australia, Western Australia and Queensland...
September 30, 2016: Communicable Diseases Intelligence Quarterly Report
https://www.readbyqxmd.com/read/28253229/response-to-a-large-polio-outbreak-in-a-setting-of-conflict-middle-east-2013-2015
#8
Chukwuma Mbaeyi, Michael J Ryan, Philip Smith, Abdirahman Mahamud, Noha Farag, Salah Haithami, Magdi Sharaf, Jaume C Jorba, Derek Ehrhardt
As the world advances toward the eradication of polio, outbreaks of wild poliovirus (WPV) in polio-free regions pose a substantial risk to the timeline for global eradication. Countries and regions experiencing active conflict, chronic insecurity, and large-scale displacement of persons are particularly vulnerable to outbreaks because of the disruption of health care and immunization services (1). A polio outbreak occurred in the Middle East, beginning in Syria in 2013 with subsequent spread to Iraq (2). The outbreak occurred 2 years after the onset of the Syrian civil war, resulted in 38 cases, and was the first time WPV was detected in Syria in approximately a decade (3,4)...
March 3, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28250116/a-neonatal-murine-model-of-coxsackievirus-a6-infection-for-evaluation-of-antiviral-and-vaccine-efficacy
#9
Zhenjie Zhang, Zhaopeng Dong, Qingjuan Wei, Michael J Carr, Juan Li, Shujun Ding, Yigang Tong, Dong Li, Weifeng Shi
Hand, foot and mouth disease (HFMD) is a global health concern. Family Picornaviridae members, particularly enterovirus 71 (EVA71) and Coxsackievirus A16 (CVA16), are the primary etiological agents of HFMD, however, a third enterovirus A species, CoxsackievirusA6 (CVA6), has been recently associated with epidemic outbreaks. Study of the pathogenesis of CVA6 infection and development of antivirals and vaccines are hindered due to the lack of appropriate animal models. We have developed and characterized a murine model of CVA6 infection which was employed to evaluate the antiviral activities of different drugs and the protective efficacies of CVA6-inactivated vaccines...
March 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28231269/a-mouse-model-of-paralytic-myelitis-caused-by-enterovirus-d68
#10
Alison M Hixon, Guixia Yu, J Smith Leser, Shigeo Yagi, Penny Clarke, Charles Y Chiu, Kenneth L Tyler
In 2014, the United States experienced an epidemic of acute flaccid myelitis (AFM) cases in children coincident with a nationwide outbreak of enterovirus D68 (EV-D68) respiratory disease. Up to half of the 2014 AFM patients had EV-D68 RNA detected by RT-PCR in their respiratory secretions, although EV-D68 was only detected in cerebrospinal fluid (CSF) from one 2014 AFM patient. Given previously described molecular and epidemiologic associations between EV-D68 and AFM, we sought to develop an animal model by screening seven EV-D68 strains for the ability to induce neurological disease in neonatal mice...
February 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28217155/acute-bulbar-palsy-plus-syndrome-a-rare-variant-of-guillain-barre-syndrome
#11
Sanghamitra Ray, Prakash Chand Jain
Guillain-Barre syndrome (GBS) is the most common cause of acute flaccid paralysis worldwide both in adult and pediatric population. Although flaccid paralysis is the hallmark of this disease, there are some rare variants which may be easily missed unless suspected. Here, we present a very rare variant of GBS - acute bulbar palsy plus syndrome in a pediatric patient. A 13-year-old female child presented with right-sided lower motor neuron type of facial palsy and palsy of bilateral glossopharyngeal and vagus nerve of 2 weeks duration...
October 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28193112/longitudinal-outcomes-in-the-2014-acute-flaccid-paralysis-cluster-in-canada
#12
Carmen Yea, Ari Bitnun, Joan Robinson, Aleksandra Mineyko, Michelle Barton, Jean K Mah, Jiri Vajsar, Susan Richardson, Christoph Licht, Jason Brophy, Megan Crone, Shalini Desai, Juliette Hukin, Kevin Jones, Katherine Muir, Jeffrey M Pernica, Robert Pless, Daniela Pohl, Mubeen F Rafay, Kathryn Selby, Sunita Venkateswaran, Geneviève Bernard, E Ann Yeh
We describe the presenting features and long-term outcome of an unusual cluster of pediatric acute flaccid paralysis cases that occurred in Canada during the 2014 enterovirus D68 outbreak. Children (n = 25; median age 7.8 years) presenting to Canadian centers between July 1 and October 31, 2014, and who met diagnostic criteria for acute flaccid paralysis were evaluated retrospectively. The predominant presenting features included prodromal respiratory illness (n = 22), cerebrospinal fluid lymphocytic pleocytosis (n = 18), pain in neck/back (n = 14) and extremities (n = 10), bowel/bladder dysfunction (n = 9), focal central gray matter lesions found in all regions of the spinal cord within the cohort (n = 16), brain stem lesions (n = 8), and bulbar symptoms (n = 5)...
March 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28174033/acute-hypotonia-in-an-infant
#13
Jimme Sierakowski, Jason Arthur, Todd Wylie
BACKGROUND: Acute flaccid myelitis (AFM) is increasing in incidence in the United States and presenting to emergency departments (EDs) across the country. This clinical entity presents as acute paralysis, with magnetic resonance imaging changes in the gray matter only in children younger than 21 years of age. The etiology is unknown, although preceding viral illnesses are common. There are no consensus guidelines regarding treatment. CASE REPORT: A 4-month-old girl presented with decreased bilateral arm movement...
February 4, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28168168/enterovirus-71-infection-and-vaccines
#14
REVIEW
Eun-Je Yi, Yun-Ju Shin, Jeong-Hwan Kim, Tae-Gyun Kim, Sun-Young Chang
Hand, foot and mouth disease (HFMD) is a highly contagious viral infection affecting young children during the spring to fall seasons. Recently, serious outbreaks of HFMD were reported frequently in the Asia-Pacific region, including China and Korea. The symptoms of HFMD are usually mild, comprising fever, loss of appetite, and a rash with blisters, which do not need specific treatment. However, there are uncommon neurological or cardiac complications such as meningitis and acute flaccid paralysis that can be fatal...
January 2017: Clinical and Experimental Vaccine Research
https://www.readbyqxmd.com/read/28165146/enterovirus-d68-detection-in-respiratory-specimens-association-with-severe-disease
#15
I Engelmann, M Fatoux, M Lazrek, E K Alidjinou, A Mirand, C Henquell, A Dewilde, D Hober
Molecular techniques increased the number of documented respiratory infections. In a substantial number of cases the causative agent remains undetected. Since August 2014, an increase in Enterovirus(EV)-D68 infections was reported. We aimed to investigate epidemiology and clinical relevance of EV-D68. From June to December 2014 and from September to December 2015, 803 and 847 respiratory specimens, respectively, were tested for respiratory viruses with a multiplex RT-PCR. This multiplex RT-PCR does not detect EV-D68...
February 6, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28163843/outcome-of-guillain-barr%C3%A3-syndrome-in-children-a-prospective-cohort-study-in-a-tertiary-hospital-in-upper-egypt
#16
Abdelrahim Abdrabou Sadek, Ashraf Abou-Taleb, Wafaa Ahmed Ali
INTRODUCTION: Guillain-Barré syndrome is the most common cause of acute flaccid paralysis in children, and defined as an acute inflammatory polyneuropathy. The objective of this study was to assess the clinico-laboratory profile, and outcome of Guillain-Barré syndrome in children at Sohag University Hospital. METHODS: This prospective cohort observational study was conducted in 2014-2015. The included children were subjected to through medical history and detailed systemic and neurological examination...
December 2016: Electronic Physician
https://www.readbyqxmd.com/read/28161421/introduction-of-inactivated-poliovirus-vaccine-leading-into-the-polio-eradication-endgame-strategic-plan-hangzhou-china-2010-2014
#17
Yan Liu, Jun Wang, Shijun Liu, Jian Du, Liang Wang, Wenwen Gu, Yuyang Xu, Shuyan Zuo, Erping Xu, Zhijie An
BACKGROUND: China's Expanded Program on Immunization (EPI) has provided 4 doses of oral poliovirus vaccine (OPV) since the 1970s. Inactivated poliovirus vaccine (IPV) became available in 2010 in Hangzhou as a private-sector, parent-chosen alternative to OPV. In 2015, WHO recommended that countries with all-OPV vaccination schedules introduce at least one dose of IPV, to mitigate risk associated with the withdrawal of type 2 OPV. We analyzed polio vaccine coverage and utilization in Hangzhou to determine patterns of IPV use and the occurrence of vaccine-associated paralytic polio (VAPP) in the various patterns identified...
February 1, 2017: Vaccine
https://www.readbyqxmd.com/read/28161374/chronic-gabaergic-blockade-in-the-spinal-cord-in%C3%A2-vivo-induces-motor-alterations-and-neurodegeneration
#18
Uri Nimrod Ramírez-Jarquín, Ricardo Tapia
Inhibitory GABAergic and glycinergic neurotransmission in the spinal cord play a central role in the regulation of neuronal excitability, by maintaining a balance with the glutamate-mediated excitatory transmission. Glutamatergic agonists infusion in the spinal cord induce motor neuron death by excitotoxicity, leading to motor deficits and paralysis, but little is known on the effect of the blockade of inhibitory transmission. In this work we studied the effects of GABAergic and glycinergic blockade, by means of microdialysis perfusion (acute administration) and osmotic minipumps infusion (chronic administration) of GABA and glycine receptors antagonists directly in the lumbar spinal cord...
February 1, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28103209/west-nile-virus-and-other-nationally-notifiable-arboviral-diseases-united-states-2015
#19
Elisabeth Krow-Lucal, Nicole P Lindsey, Jennifer Lehman, Marc Fischer, J Erin Staples
Arthropod-borne viruses (arboviruses) are transmitted to humans primarily through the bites of infected mosquitoes and ticks. The leading cause of domestically acquired arboviral disease in the United States is West Nile virus (WNV) (1). Other arboviruses, including La Crosse, St. Louis encephalitis, Jamestown Canyon, Powassan, and eastern equine encephalitis viruses, also cause sporadic cases and outbreaks. This report summarizes surveillance data reported to CDC in 2015 for nationally notifiable arboviruses...
January 20, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28095134/physical-and-occupational-therapy-for-a-teenager-with-acute-flaccid-myelitis-a-case-report
#20
Tracy Kornafel, Elaine Y Tsao, Emily Sabelhaus, Lori Surges, Susan D Apkon
AIMS: The purpose of this case report is to describe the inpatient rehabilitation program of a 13-year-old boy with acute flaccid myelitis (AFM), specific to physical and occupational therapy examination, treatment, and outcomes. CASE DESCRIPTION: AFM is a rare, acute neurologic illness in children and young adults who present with weakness and/or paralysis of unknown etiology. The teenager was admitted to the program, dependent for all mobility and self-care. Interventions focused on range of motion, transfer training, self-care, power wheelchair mobility, and environmental adaptations...
January 17, 2017: Physical & Occupational Therapy in Pediatrics
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