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Structures virales
Virion
Virion : Questions médicales fréquentes
Termes MeSH sélectionnés :
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"description": "Comment identifier un virion dans un échantillon ?\nQuels tests sont utilisés pour détecter les virions ?\nLes virions peuvent-ils être visualisés au microscope ?\nQuelle est la méthode de culture des virions ?\nLes tests sérologiques détectent-ils les virions ?",
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"description": "Quelles complications peuvent survenir après une infection virale ?\nLes virions peuvent-ils causer des maladies chroniques ?\nComment les complications sont-elles gérées ?\nLes complications varient-elles selon le virion ?\nLes enfants sont-ils plus à risque de complications ?",
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"description": "Quels sont les facteurs de risque d'infection virale ?\nLe stress affecte-t-il le risque d'infection virale ?\nLes maladies chroniques augmentent-elles le risque d'infection ?\nL'environnement joue-t-il un rôle dans le risque viral ?\nLes habitudes alimentaires influencent-elles le risque viral ?",
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"name": "Comment identifier un virion dans un échantillon ?",
"position": 1,
"acceptedAnswer": {
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"text": "L'identification se fait par microscopie électronique ou tests PCR."
}
},
{
"@type": "Question",
"name": "Quels tests sont utilisés pour détecter les virions ?",
"position": 2,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les tests PCR, les cultures virales et les tests sérologiques sont courants."
}
},
{
"@type": "Question",
"name": "Les virions peuvent-ils être visualisés au microscope ?",
"position": 3,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les virions peuvent être visualisés au microscope électronique."
}
},
{
"@type": "Question",
"name": "Quelle est la méthode de culture des virions ?",
"position": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les virions sont cultivés dans des cellules hôtes appropriées en laboratoire."
}
},
{
"@type": "Question",
"name": "Les tests sérologiques détectent-ils les virions ?",
"position": 5,
"acceptedAnswer": {
"@type": "Answer",
"text": "Non, ils détectent les anticorps contre les virions, pas les virions eux-mêmes."
}
},
{
"@type": "Question",
"name": "Quels symptômes indiquent une infection virale ?",
"position": 6,
"acceptedAnswer": {
"@type": "Answer",
"text": "Fièvre, fatigue, douleurs musculaires et symptômes respiratoires sont fréquents."
}
},
{
"@type": "Question",
"name": "Les virions causent-ils toujours des symptômes ?",
"position": 7,
"acceptedAnswer": {
"@type": "Answer",
"text": "Non, certains virions peuvent être asymptomatiques chez l'hôte."
}
},
{
"@type": "Question",
"name": "Comment les symptômes varient-ils selon le virion ?",
"position": 8,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les symptômes dépendent du type de virus et de l'hôte infecté."
}
},
{
"@type": "Question",
"name": "Les symptômes d'une infection virale sont-ils immédiats ?",
"position": 9,
"acceptedAnswer": {
"@type": "Answer",
"text": "Non, il peut y avoir une période d'incubation avant l'apparition des symptômes."
}
},
{
"@type": "Question",
"name": "Les virions peuvent-ils provoquer des symptômes neurologiques ?",
"position": 10,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, certains virions, comme ceux de la grippe, peuvent affecter le système nerveux."
}
},
{
"@type": "Question",
"name": "Comment prévenir les infections virales ?",
"position": 11,
"acceptedAnswer": {
"@type": "Answer",
"text": "Se laver les mains, éviter les contacts étroits et se faire vacciner sont essentiels."
}
},
{
"@type": "Question",
"name": "Les masques protègent-ils contre les virions ?",
"position": 12,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les masques réduisent la transmission des virions par voie respiratoire."
}
},
{
"@type": "Question",
"name": "Les vaccins sont-ils efficaces contre tous les virions ?",
"position": 13,
"acceptedAnswer": {
"@type": "Answer",
"text": "Non, chaque vaccin cible des virions spécifiques et ne protège pas contre tous."
}
},
{
"@type": "Question",
"name": "L'hygiène personnelle aide-t-elle à prévenir les infections ?",
"position": 14,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une bonne hygiène personnelle réduit le risque d'infections virales."
}
},
{
"@type": "Question",
"name": "Les voyages augmentent-ils le risque d'infection virale ?",
"position": 15,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les voyages peuvent exposer à de nouveaux virions et augmenter le risque d'infection."
}
},
{
"@type": "Question",
"name": "Quels traitements sont efficaces contre les virions ?",
"position": 16,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les antiviraux, comme l'oseltamivir, sont utilisés pour traiter certaines infections virales."
}
},
{
"@type": "Question",
"name": "Les antibiotiques sont-ils efficaces contre les virions ?",
"position": 17,
"acceptedAnswer": {
"@type": "Answer",
"text": "Non, les antibiotiques ne sont pas efficaces contre les infections virales."
}
},
{
"@type": "Question",
"name": "Comment les vaccins agissent-ils contre les virions ?",
"position": 18,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les vaccins stimulent le système immunitaire à reconnaître et combattre les virions."
}
},
{
"@type": "Question",
"name": "Les traitements symptomatiques sont-ils utiles ?",
"position": 19,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, ils aident à soulager les symptômes, mais ne traitent pas l'infection virale."
}
},
{
"@type": "Question",
"name": "Les traitements antiviraux sont-ils toujours efficaces ?",
"position": 20,
"acceptedAnswer": {
"@type": "Answer",
"text": "Non, leur efficacité dépend du type de virus et de la résistance virale."
}
},
{
"@type": "Question",
"name": "Quelles complications peuvent survenir après une infection virale ?",
"position": 21,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des complications comme la pneumonie, la déshydratation ou des infections secondaires peuvent survenir."
}
},
{
"@type": "Question",
"name": "Les virions peuvent-ils causer des maladies chroniques ?",
"position": 22,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, certains virions, comme le VIH, peuvent entraîner des maladies chroniques."
}
},
{
"@type": "Question",
"name": "Comment les complications sont-elles gérées ?",
"position": 23,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les complications sont gérées par des traitements symptomatiques et des soins médicaux appropriés."
}
},
{
"@type": "Question",
"name": "Les complications varient-elles selon le virion ?",
"position": 24,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, chaque virion peut entraîner des complications différentes selon l'hôte."
}
},
{
"@type": "Question",
"name": "Les enfants sont-ils plus à risque de complications ?",
"position": 25,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les enfants peuvent être plus vulnérables aux complications des infections virales."
}
},
{
"@type": "Question",
"name": "Quels sont les facteurs de risque d'infection virale ?",
"position": 26,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les facteurs incluent l'âge, le système immunitaire affaibli et l'exposition à des porteurs."
}
},
{
"@type": "Question",
"name": "Le stress affecte-t-il le risque d'infection virale ?",
"position": 27,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, le stress peut affaiblir le système immunitaire et augmenter le risque d'infection."
}
},
{
"@type": "Question",
"name": "Les maladies chroniques augmentent-elles le risque d'infection ?",
"position": 28,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les maladies chroniques peuvent affaiblir l'immunité et augmenter le risque d'infection virale."
}
},
{
"@type": "Question",
"name": "L'environnement joue-t-il un rôle dans le risque viral ?",
"position": 29,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des environnements surpeuplés ou insalubres augmentent le risque d'infections virales."
}
},
{
"@type": "Question",
"name": "Les habitudes alimentaires influencent-elles le risque viral ?",
"position": 30,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une alimentation déséquilibrée peut affaiblir le système immunitaire et augmenter le risque."
}
}
]
}
]
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Atopic dermatitis (AD) primarily affects the pediatric population, which is highly colonized by S. aureus. However, little is known about the genetic features of this microorganism and other staphyloc...
This study aimed to characterize Staphylococcus spp. isolated from the nares and skin (with and without lesion) of 30 AD and 12 non-AD Brazilian children....
Skin and nasal swabs were cultured onto mannitol salt agar, and bacterial colonies were counted and identified by matrix assisted laser desorption ionization time of flight mass spectrometry and polym...
S. aureus was more prevalent in the nares (P = 0.005) and lesional skin (P = 0.0002) of children with AD, while S. hominis was more frequent in the skin of non-AD children (P < 0.0001). All children i...
High colonization by polyclonal S. aureus isolates was found among children with AD, while S. hominis was more frequent among non-AD children. The high prevalence of methicillin-resistant staphylococc...
Endoscopic endonasal approach (EEA) procedures are inherently contaminated due to direct access through the nasopharyngeal mucosa. The reported rate of postoperative meningitis in EEA procedures is 0....
All adult patients who underwent EEA resection at our institution from 2013 to 2021 were retrospectively reviewed. Patients with preoperative cerebrospinal fluid infections were excluded. Data includi...
Of 483 patients identified (mean age, 51 years; range, 18-90 years; 274 [56.7%] female), 80 (16.6%) had a positive preoperative methicillin-resistant Staphylococcus aureus (MRSA)/methicillin-sensitive...
Postoperative rates of meningitis after EEA surgery were not significantly changed based on MRSA/MSSA colonization status of the patient or preoperative decolonization. The utility of preoperative tes...
Few studies have evaluated the use of ceftriaxone (CRO) in the treatment of methicillin-susceptible Staphylococcus aureus (MSSA) infections. The purpose of this study was to compare the safety and eff...
The objectives of this work were to know the prevalence of methicillin-resistant S. aureus (MRSA) infections in the paediatric population of our health department, to describe the risk factors for inf...
A retrospective, descriptive and analytical study of infections produced by MRSA versus those produced by MSSA was carried out during the years 2014 to 2018. Risk factors for MRSA infection were studi...
162 patients with S. aureus infections were identified. Of these, 25 (15.4%) were MRSA. The highest percentages of MRSA infection occurred among children who required hospital admission (23.4%). In th...
Our results suggest the need to review empirical local treatment regimen using drugs active against MRSA in infections of probable staphylococcal origin admitted to the hospital, especially if they ha...
Screening patients for...
Staphylococcus argenteus is generally more susceptible to antibiotic treatments than Staphylococcus aureus; however, the study showed that the daptomycin/vancomycin-resistant S. argenteus was isolated...
Eleven S. argenteus isolates were used for passaging under different concentrations of vancomycin. The minimal inhibitory concentration (MIC) of vancomycin was determined by the agar dilution assay, a...
The MIC of vancomycin for eight of 11 S. argenteus isolates was increased from ≤2 µg/mL to ≤4-8 µg/mL after vancomycin passages. Two variants with the high-level vancomycin-intermediate (vancomycin MI...
S. argenteus is capable of acquiring a vancomycin-tolerant phenotype and/or converting to a strong biofilm producer after vancomycin passages, which could contribute to the decrease of their antibioti...
In blood cultures that test positive for staphylococcal bacteria, rapid identification of methicillin-resistant Staphylococcus aureus (MRSA) or methicillin-susceptible Staphylococcus aureus (MSSA) by ...
We retrospectively studied 100 blood culture cases positive for S. aureus at Sapporo Medical University Hospital between March 2019 and May 2022. Cycle threshold (CT) values for target genes from the ...
We analyzed 25 and 75 isolates assigned to MRSA and MSSA, respectively, using the Xpert MRSA/SA BC assay. Of these, 99 isolates from agar cultures showed compatible susceptibility to oxacillin. One ge...
The Xpert MRSA/SA BC assay accurately identified MRSA and MSSA in positive blood cultures. However, over half of the MSSA isolates showed positive results for orfX-SCCmec, presumably due to genetic di...
Antistaphylococcal penicillins and cefazolin remain the primary treatments for infections with methicillin-susceptible Staphylococcus aureus (MSSA). The cefazolin inoculum effect (CzIE) causes the cef...
There are many reports on gene mutations observed in methicillin-resistant Staphylococcus aureus (MRSA) showing reduced susceptibility to vancomycin. However, there are limited studies on the genetic ...
In total, 124 MSSA strains were analysed, with 62 having vancomycin MICs of 1-2 mg/L (MS-HV) and the remaining 62 having MICs <1 mg/L (MS-LV) as control. Polymerase chain reaction amplification and se...
The MS-HV strains had a significantly higher median number of SNPs in studied genes than the MS-LV strains (5 vs 3; P < 0.0001), with higher frequency of SNPs in the graR and walK genes. The MS-HV str...
Mutations in the graR and walK genes may contribute to reduced vancomycin susceptibility in MSSA. This study gives key insights into the mechanisms underlying this phenomenon....
Methicillin-resistant Staphylococcus aureus (MRSA) is a clinical threat with high morbidity and mortality. Here, we describe a new simple, rapid identification method for MRSA using oxacillin sodium s...