Comment identifier un virion dans un échantillon ?

L'identification se fait par microscopie électronique ou tests PCR.

Quels tests sont utilisés pour détecter les virions ?

Les tests PCR, les cultures virales et les tests sérologiques sont courants.

Les virions peuvent-ils être visualisés au microscope ?

Oui, les virions peuvent être visualisés au microscope électronique.

Quelle est la méthode de culture des virions ?

Les virions sont cultivés dans des cellules hôtes appropriées en laboratoire.

Les tests sérologiques détectent-ils les virions ?

Non, ils détectent les anticorps contre les virions, pas les virions eux-mêmes.

Quels symptômes indiquent une infection virale ?

Fièvre, fatigue, douleurs musculaires et symptômes respiratoires sont fréquents.

Les virions causent-ils toujours des symptômes ?

Non, certains virions peuvent être asymptomatiques chez l'hôte.

Comment les symptômes varient-ils selon le virion ?

Les symptômes dépendent du type de virus et de l'hôte infecté.

Les symptômes d'une infection virale sont-ils immédiats ?

Non, il peut y avoir une période d'incubation avant l'apparition des symptômes.

Les virions peuvent-ils provoquer des symptômes neurologiques ?

Oui, certains virions, comme ceux de la grippe, peuvent affecter le système nerveux.

Comment prévenir les infections virales ?

Se laver les mains, éviter les contacts étroits et se faire vacciner sont essentiels.

Les masques protègent-ils contre les virions ?

Oui, les masques réduisent la transmission des virions par voie respiratoire.

Les vaccins sont-ils efficaces contre tous les virions ?

Non, chaque vaccin cible des virions spécifiques et ne protège pas contre tous.

L'hygiène personnelle aide-t-elle à prévenir les infections ?

Oui, une bonne hygiène personnelle réduit le risque d'infections virales.

Les voyages augmentent-ils le risque d'infection virale ?

Oui, les voyages peuvent exposer à de nouveaux virions et augmenter le risque d'infection.

Quels traitements sont efficaces contre les virions ?

Les antiviraux, comme l'oseltamivir, sont utilisés pour traiter certaines infections virales.

Les antibiotiques sont-ils efficaces contre les virions ?

Non, les antibiotiques ne sont pas efficaces contre les infections virales.

Comment les vaccins agissent-ils contre les virions ?

Les vaccins stimulent le système immunitaire à reconnaître et combattre les virions.

Les traitements symptomatiques sont-ils utiles ?

Oui, ils aident à soulager les symptômes, mais ne traitent pas l'infection virale.

Les traitements antiviraux sont-ils toujours efficaces ?

Non, leur efficacité dépend du type de virus et de la résistance virale.

Quelles complications peuvent survenir après une infection virale ?

Des complications comme la pneumonie, la déshydratation ou des infections secondaires peuvent survenir.

Les virions peuvent-ils causer des maladies chroniques ?

Oui, certains virions, comme le VIH, peuvent entraîner des maladies chroniques.

Comment les complications sont-elles gérées ?

Les complications sont gérées par des traitements symptomatiques et des soins médicaux appropriés.

Les complications varient-elles selon le virion ?

Oui, chaque virion peut entraîner des complications différentes selon l'hôte.

Les enfants sont-ils plus à risque de complications ?

Oui, les enfants peuvent être plus vulnérables aux complications des infections virales.

Quels sont les facteurs de risque d'infection virale ?

Les facteurs incluent l'âge, le système immunitaire affaibli et l'exposition à des porteurs.

Le stress affecte-t-il le risque d'infection virale ?

Oui, le stress peut affaiblir le système immunitaire et augmenter le risque d'infection.

Les maladies chroniques augmentent-elles le risque d'infection ?

Oui, les maladies chroniques peuvent affaiblir l'immunité et augmenter le risque d'infection virale.

L'environnement joue-t-il un rôle dans le risque viral ?

Oui, des environnements surpeuplés ou insalubres augmentent le risque d'infections virales.

Les habitudes alimentaires influencent-elles le risque viral ?

Oui, une alimentation déséquilibrée peut affaiblir le système immunitaire et augmenter le risque.

Virion - Informations médicales vérifiées

Overview of Mycotic Keratitis.

01 Sep 2024

DOI: 10.1097/ICO.0000000000003559 PMID: 39102310

Keratomycosis is a serious corneal infection associated with high ocular morbidity that can lead to severe vision loss. It is estimated to affect more than 1 million patients annually, most commonly o...

Humans Eye Infections, Fungal Antifungal Agents Keratitis Microscopy, Confocal

Monkeypox-Associated Disciform Keratitis.

01 May 2023

DOI: 10.1097/ICO.0000000000003171 PMID: 36729600

The purpose of this study was to describe a case of monkeypox (MPX)-associated disciform keratitis.... This is a case report.... A 36-year-old male patient presented to the infectious diseases clinic with a 1-week history of disseminated pustular skin lesions, a 4-day history of constitutional symptoms, and redness in the left ... MPX may cause disciform keratitis and scarring that closely resembles other ocular viral infections. Clinical trials are urgently needed to define the optimal management of human MPX infections and re...

Male Humans Adult Mpox (monkeypox) Keratitis +3 autres

Applications of photodynamic therapy in keratitis.

15 Mar 2024

DOI: 10.1007/s10792-024-03062-4 PMID: 38491335

Keratitis is corneal inflammatory disease which may be caused by several reason such as an injury, allergy, as well as a microbial infection. Besides these, overexposure to ultraviolet light and unhyg...

Humans Keratitis Cornea Corneal Diseases Contact Lenses +1 autres

[Fusarium Keratitis-an upcoming threat in Germany?]

Oct 2022

DOI: 10.1007/s00347-022-01646-y PMID: 35925324

Fungal keratitis due to Fusarium species is known to be typical of developing countries; however, with the increasing use of contact lenses a rise of Fusarium keratitis has been observed in Germany.... In a monocentric retrospective study, we analyzed all patients who presented to our university eye hospital with infectious keratitis between January 2011 and December 2021 and had a proof of Fusarium... We could identify 13 patients with a proof of Fusarium species. A significant increase of cases in 2021 was observed. In 76.9% of our cases the patients were female and in 76.9% the patients had a his... Due to difficult detection and a high resistance rate to common antifungals, Fusarium keratitis is prone to delayed diagnosis and limited treatment outcomes. Whenever risk factors are present and infe...

Anti-Bacterial Agents Antifungal Agents Corneal Ulcer Eye Infections, Fungal Female +6 autres

The Utility of Corneal Cultures in Bacterial Keratitis.

01 Aug 2023

DOI: 10.1097/ICL.0000000000001004 PMID: 37488724

To determine the utility and use of corneal cultures in bacterial keratitis.... Retrospective single-center chart review of patients with bacterial keratitis who showed a positive corneal culture result from January 2017 to December 2021.... Seventy-four cases of bacterial keratitis in 73 patients with positive cultures were identified. The most common organisms were Pseudomonas, Staphylococcus, and Streptococcus species. In total, 87.8% ... Multidrug resistance was infrequent in the study population. Empiric antibiotic therapy is still effective in bacterial corneal ulcers. Corneal cultures may have utility in antibiotic de-escalation....

Humans Retrospective Studies Keratitis Cornea Corneal Ulcer +2 autres

Thygeson's superficial punctate keratitis in children.

Nov 2023

DOI: 10.1038/s41433-023-02533-9 PMID: 37085721

To describe the first paediatric case series of Thygesons' superficial punctate keratitis (TSPK) with management outcomes.... A retrospective chart review was done for all children either diagnosed at initial presentation or referred with TSPK from 01/2012 to 08/2021 at a tertiary children's hospital. Records were assessed f... Fifteen children (7 females), mean age at presentation 8 ± 4 years were included. All had bilateral disease and a BCVA of >20/40 in the better eye. All patients received topical fluorometholone 0.1%, ... Children with TSPK respond quickly to steroids, however, recurrences are common, necessitating a slow taper. Non-response to steroid needs careful reconsideration of the diagnosis and may necessitate ...

Female Humans Child Child, Preschool Cornea +4 autres

Incidence and clinical characteristics of paediatric keratitis.

09 2023

DOI: 10.1136/bjophthalmol-2021-320793 PMID: 35568385

To report the incidence and clinical characteristics of paediatric keratitis diagnosed over a 10-year period in a well-defined population.... Retrospective, population-based study.... Setting: multicentre.... patients (<19 years) diagnosed with keratitis as residents of Olmsted County from 1 January 2000, through 31 December 2009.... calculated annual age-specific and gender-specific incidence rates, demographic information and initial and final visual acuity.... A total of 294 diagnoses of keratitis occurred in 285 children during the 10-year period, yielding an incidence of 78.0 per 100 000 younger than 19 years (95% CI 69.0 to 87.1) or approximately 1 in 12... Keratitis, regardless of aetiology, was observed in approximately 1 in 1300 children by 19 years of age in this population-based cohort. Nearly half were related to contact lens wear and a decrease in...

Humans Child Female Male Incidence +4 autres

Fusarium Keratitis: A Systematic Review (1969 to 2023).

07 Aug 2024

DOI: 10.1007/s11046-024-00874-x PMID: 39107598

Mycotic keratitis (MK) represents a corneal infection, with Fusarium species identified as the leading cause. Fusarium is a genus of filamentous fungi commonly found in soil and plants. While many Fus... To conduct an analysis of Fusarium keratitis, we looked through the literature from the databases PubMed, Embase, Lilacs, and Google Scholar and found 99 papers that, between March 1969 and September ... Our analysis revealed the Fusarium solani species complex as the predominant isolate, with females disproportionately affected by Fusarium keratitis. Notably, contact lens usage emerged as a significa... Our study sheds light on the clinical complexities of Fusarium keratitis and emphasizes the need for further research and surveillance to effectively tackle this vision-threatening condition. Furtherm...

Humans Keratitis Fusarium Fusariosis Antifungal Agents +14 autres

Role of corneal biopsy in the management of infectious keratitis.

01 Jul 2022

DOI: 10.1097/ICU.0000000000000852 PMID: 35708051

The aim of this study was to review the existing literature and investigate the role of microbiologic culture and histopathologic examination of corneal biopsies in the management of infectious kerati... Corneal biopsy continues to be a significantly useful tool in the diagnosis and tailored management of infectious keratitis. Several techniques can be employed for tissue collection, handling and proc... Corneal opacities represent a significant cause of global blindness, and infectious keratitis is the most common cause. Organism identification in progressive infectious keratitis is essential for pro...

Biopsy Cornea Corneal Transplantation Humans Keratitis +1 autres

Infectious Keratitis in Patients with Ocular Sjögren's Syndrome.

10 2022

DOI: 10.3341/kjo.2022.0064 PMID: 35989069

To investigate the incidence, characteristics, risk factors, and treatment outcomes for infectious keratitis in patients with ocular Sjögren's syndrome (SS).... We performed a retrospective chart review of patients who had been followed up for ocular SS in Seoul National University Hospital from 2010 to 2020 and identified cases where infectious keratitis dev... Out of 929 patients with ocular SS, infectious keratitis occurred in 18 eyes (1.94%). All 18 patients were female in the ocular SS group, while 48 out of 100 infectious keratitis patients (48%) were f... The incidence of infectious keratitis was 1.94% in patients with ocular SS. Most were bacterial infections and resolved by medical treatment. Therapeutic and visual outcomes were favorable, but recurr...

Aged Cornea Eye Infections, Bacterial Female Humans +4 autres

Virion : Questions médicales fréquentes

Termes MeSH sélectionnés :

Questions fréquentes et termes MeSH associés

Diagnostic 5

Symptômes 5

Prévention 5

Traitements 5

Complications 5

Facteurs de risque 5

Contenu validé par Dr Olivier Menir

Sous-catégories

Nucléocapside

Enveloppe virale

Capside

Auteurs principaux

Sources (611 au total)