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Herpes keratitis

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https://www.readbyqxmd.com/read/28320407/association-between-sensitivity-of-viral-thymidine-kinase-associated-acyclovir-resistant-herpes-simplex-virus-type-1-and-virulence
#1
Natsumi Omura, Hikaru Fujii, Tomoki Yoshikawa, Souichi Yamada, Shizuko Harada, Takuya Inagaki, Miho Shibamura, Haruko Takeyama, Masayuki Saijo
BACKGROUND: Acyclovir (ACV)-resistant (ACVr) herpes simplex virus type 1 (HSV-1) infections are concern in immunocompromised patients. Most clinical ACVr HSV-1 isolates have mutations in the viral thymidine kinase (vTK) genes. The vTK-associated ACVr HSV-1 shows reduced virulence, but the association between the level of resistance and the virulence of the vTK-associated ACVr HSV-1 is still unclear. METHODS: The virulence in mice of 5 vTK-associated ACVr HSV-1 clones with a variety of ACV sensitivities, when inoculated through intracerebral and corneal routes, was evaluated in comparison with ACV-sensitive (ACVs) parent HSV-1 TAS...
March 21, 2017: Virology Journal
https://www.readbyqxmd.com/read/28278385/the-type-i-interferon-response-and-age-dependent-susceptibility-to-herpes-simplex-virus-infection
#2
Daniel Giraldo, Douglas R Wilcox, Richard Longnecker
Herpes simplex virus type 1 (HSV-1) is a highly prevalent human neurotropic pathogen. HSV-1 infection is associated with a variety of diseases ranging from benign orolabial lesions to more serious and even life-threatening conditions such as herpes simplex keratitis and herpes simplex encephalitis (HSE). HSE is a rare occurrence among healthy adult individuals, but newborns are a particularly susceptible population. Type I IFN signaling has been identified as a crucial component of the innate immune response to the control of HSV-1 infection...
March 9, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28275607/intracorneal-and-intraocular-invasion-of-ocular-surface-squamous-neoplasia-after-intraocular-surgery-report-of-two-cases-and-review-of-the-literature
#3
Juan C Murillo, Anat Galor, Michael C Wu, Natasha K Kye, James Wong, Ibrahim O Ahmed, Madhura Joag, Nabeel Shalabi, William Lahners, Sander Dubovy, Carol L Karp
PURPOSE: The aim of this paper was to describe 2 cases of ocular surface squamous neoplasia (OSSN) of the conjunctiva with intracorneal and intraocular extension following intraocular surgery. METHODS: We conducted a clinical pathological retrospective case series. RESULTS: Case 1 underwent cataract surgery in the setting of an unnoticed adjacent OSSN. An excisional biopsy with cryotherapy and intraoperative mitomycin C was subsequently performed, confirming OSSN...
January 2017: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/28176902/herpes-simplex-keratitis-challenges-in-diagnosis-and-clinical-management
#4
REVIEW
Tayaba N Azher, Xiao-Tang Yin, Deena Tajfirouz, Andrew Jw Huang, Patrick M Stuart
Herpes simplex virus is responsible for numerous ocular diseases, the most common of which is herpetic stromal keratitis. This is a recurrent infection of the cornea that typically begins with a subclinical infection of the cornea that establishes a latent infection of sensory ganglia, most often the trigeminal ganglia. Recurring infections occur when the virus is reactivated from latency and travels back to the cornea, where it restimulates an inflammatory response. This inflammatory response can lead to decreased corneal sensation, scarring, and blindness...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28138334/atopic-keratoconjunctivitis-complicated-by-kocuria-koreensis-keratitis-the-first-case
#5
Noriko Inada, Jun Shoji, Satoru Yamagami
BACKGROUND: Patients with atopic dermatitis have a predisposition to Staphylococcus aureus and a Herpes simplex virus infection. The treatment of atopic diseases with steroid and immunosuppressive agents induces opportunistic infection. However, there is a concern regarding visual prognosis in patients with atopic keratoconjunctivitis (AKC) complicated with infectious keratitis. We report an unusual case of an atopic shield ulcer with Kocuria keratitis. CASE PRESENTATION: A 51-year-old Japanese man presented with a 14-day history of eye pain and visual loss in his left eye...
2017: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/28115476/long-term-consequences-of-topical-dexamethasone-treatment-during-acute-corneal-hsv-1-infection-on-the-immune-system
#6
Ana J Chucair-Elliott, Meghan M Carr, Daniel J J Carr
Herpes simplex virus type 1 (HSV-1) is a leading cause of neurotrophic keratitis (NTK). NTK is characterized by decreased corneal sensation from damage to the corneal sensory fibers. We have reported on the regression of corneal nerves and their function during acute HSV-1 infection. That nerve loss is followed by an aberrant process of nerve regeneration during the latent phase of infection that lacks functional recovery. We recently showed the elicited immune response in the infected cornea, and not viral replication itself, is part of the mechanism responsible for the nerve degeneration process after infection...
January 23, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28100624/azacytidine-treatment-inhibits-the-progression-of-herpes-stromal-keratitis-by-enhancing-regulatory-t-cell-function
#7
Siva Karthik Varanasi, Pradeep B J Reddy, Siddheshvar Bhela, Ujjaldeep Jaggi, Fernanda Gimenez, Barry T Rouse
Ocular infection with herpes simplex virus 1 (HSV-1) sets off an inflammatory reaction in the cornea which leads to both virus clearance and chronic lesions that are orchestrated by CD4 T cells. Approaches that enhance the function of regulatory T cells (Treg) and dampen effector T cells can be effective to limit stromal keratitis (SK) lesion severity. In this report, we explore the novel approach of inhibiting DNA methyltransferase activity using 5-azacytidine (Aza; a cytosine analog) to limit HSV-1-induced ocular lesions...
April 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28070732/the-clinical-and-laboratory-spectrum-of-dedicator-of-cytokinesis-8-immunodeficiency-syndrome-in-patients-with-a-unique-mutation
#8
Arnon Broides, Amarilla B Mandola, Jacov Levy, Baruch Yerushalmi, Vered Pinsk, Michal Eldan, George Shubinsky, Nurit Hadad, Rachel Levy, Amit Nahum, Miriam Ben-Harosh, Atar Lev, Amos Simon, Raz Somech
Mutations in the dedicator of cytokinesis 8 (DOCK8) gene cause a combined immunodeficiency usually diagnosed as autosomal recessive hyper IgE syndrome. We sought to reveal the varying manifestations in patients with a unique mutation in DOCK8 gene by a retrospective medical record review. Ten patients from five consanguineous families and three tribes were included. Seven patients were homozygous for the c.C5134A, p.S1711X mutation, and the remaining three patients were their siblings manifesting hyper IgE syndrome features without a genetic diagnosis...
January 10, 2017: Immunologic Research
https://www.readbyqxmd.com/read/28062697/subclinical-herpes-simplex-virus-type-1-infections-provide-site-specific-resistance-to-an-unrelated-pathogen
#9
Alexander M Rowe, Hongming Yun, Benjamin R Treat, Paul R Kinchington, Robert L Hendricks
HSV-1 infections of the cornea range in severity from minor transient discomfort to the blinding disease herpes stromal keratitis, yet most patients experience a single episode of epithelial keratitis followed by re-establishment of a clear cornea. We asked whether a single transient episode of HSV-1 epithelial keratitis causes long-term changes in the corneal microenvironment that influence immune responses to subsequent corneal infection or trauma. We showed that C57BL/6 mouse corneas infected with HSV-1 KOS, which induces transient herpes epithelial keratitis without herpes stromal keratitis sequelae, possessed a significant leukocytic infiltrate composed primarily of CD4(+) T cells and macrophages along with elevated chemokines and cytokines that persisted without loss of corneal clarity (subclinical inflammation)...
January 6, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28060081/herpes-simplex-virus-keratitis-and-resistance-to-acyclovir
#10
Asim V Farooq
No abstract text is available yet for this article.
February 2017: Cornea
https://www.readbyqxmd.com/read/28055100/exposure-stress-induces-reversible-corneal-graft-opacity-in-recipients-with-herpes-simplex-virus-1-infections
#11
Alexander M Rowe, Hongmin Yun, Robert L Hendricks
Purpose: Most of the inflammation in murine herpes simplex virus type 1 (HSV-1)-induced stromal keratitis (HSK) is due to exposure stress resulting from loss of corneal nerves and blink reflex. Corneal grafts often fail when placed on corneal beds with a history of HSK. We asked if corneal exposure contributes to the severe pathology of corneal grafts on HSV-1-infected corneal beds. Methods: Herpes simplex virus type 1-infected corneas were tested for blink reflex...
January 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27941388/herpes-simplex-virus-keratitis-and-resistance-to-acyclovir
#12
Asim V Farooq
No abstract text is available yet for this article.
December 8, 2016: Cornea
https://www.readbyqxmd.com/read/27935235/bilateral-tear-film-alterations-in-patients-with-unilateral-quiescent-herpes-simplex-keratitis
#13
Xiao Ma, Yan Lu
PURPOSE: To evaluate bilateral tear function and corneal sensitivity in patients with unilateral quiescent herpes simplex keratitis (HSK) and determine the correlation between corneal sensitivity and tear secretion in both eyes. METHODS: Thirty-five patients diagnosed with unilateral quiescent HSK and 35 heathy controls were included in this study. Bilateral tear osmolarity, Schirmer's test, the tear break-up time (TBUT) and corneal sensitivity were measured in all participants...
December 9, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27911430/-clinical-presentations-of-herpes-zoster-ophthalmicus-diagnosis-and-therapy
#14
G M Chernakova, E A Kleshcheva, T B Semenova
Approximately a quarter of the world's population at some point in life is at risk of developing shingles (Herpes Zoster). In 10-20% of cases the first branch of the trigeminal nerve gets involved (Herpes Zoster Ophthalmicus, HZO). Ophthalmic complications of HZO are able to cause a significant reduction in visual function. AIM: To study and summarize clinical features of HZO (including the rate of complications and their nature) and to determine the relationship between clinical and laboratory data from these patients...
2016: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/27902849/oral-antivirals-for-preventing-recurrent-herpes-simplex-keratitis-in-people-with-corneal-grafts
#15
REVIEW
Uday K Bhatt, M N Abdul Karim, Jeremy I Prydal, Senthil V Maharajan, Usama Fares
BACKGROUND: Ocular herpes is a viral infection of the eye caused by the herpes simplex virus (HSV), a double-stranded DNA virus. Corneal scarring caused by herpes simplex keratitis (HSK) is the leading infectious cause of penetrating corneal graft in high-income countries. Acyclovir is an antiviral drug known to have a protective effect against recurrences in herpetic eye disease. While there are some studies which have evaluated the effects of intervention with oral antiviral in preventing such recurrences in people with corneal grafts, a systematic review of all comparative clinical trials has not been previously undertaken...
November 30, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27867111/anti-inflammatory-activity-of-punica-granatum-l-pomegranate-rind-extracts-applied-topically-to-ex-vivo-skin
#16
David M J Houston, Joachim Bugert, Stephen P Denyer, Charles M Heard
Coadministered pomegranate rind extract (PRE) and zinc (II) produces a potent virucidal activity against Herpes simplex virus (HSV); however, HSV infections are also associated with localised inflammation and pain. Here, the objective was to determine the anti-inflammatory activity and relative depth penetration of PRE, total pomegranate tannins (TPT) and zinc (II) in skin, ex vivo. PRE, TPT and ZnSO4 were dosed onto freshly excised ex vivo porcine skin mounted in Franz diffusion cells and analysed for COX-2, as a marker for modulation of the arachidonic acid inflammation pathway, by Western blotting and immunohistochemistry...
November 17, 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27863844/persistent-impairment-of-quality-of-life-in-patients-with-herpes-simplex-keratitis
#17
Clotilde Reynaud, Antoine Rousseau, Godefroy Kaswin, Mohamed M'garrech, Emmanuel Barreau, Marc Labetoulle
PURPOSE: To evaluate the quality of life (QoL) in patients with quiescent herpes simplex keratitis compared with control patients without ocular herpes. DESIGN: Prospective, case-control study. PARTICIPANTS: Thirty-three patients with a unilateral and relapsing herpes simplex keratitis (HSK group) that was quiescent during evaluation (no acute episode in the past 3 months) and 66 patients with no history of HSK (control group). Both groups were age and gender matched...
February 2017: Ophthalmology
https://www.readbyqxmd.com/read/27849421/management-of-neonatal-herpes-simplex-infection-a-rare-case-of-blepharoconjunctivitis-and-concurrent-epithelial-and-stromal-keratitis
#18
Rita J C Matos, Joana M S Pires, Dionísio Cortesão
No abstract text is available yet for this article.
November 16, 2016: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/27832414/herpetiform-keratitis-and-palmoplantar-hyperkeratosis-warning-signs-for-richner-hanhart-syndrome
#19
Diogo C Soares, Mariana N Stroparo, Yu C Lian, Cristina Y Takakura, Sabrina Wolf, Regina Betz, Chong A Kim
Richner-Hanhart syndrome (RHS, tyrosinemia type II) is a rare, autosomal recessive inborn error of tyrosine metabolism caused by tyrosine aminotransferase deficiency. It is characterized by photophobia due to keratitis, painful palmoplantar hyperkeratosis, variable mental retardation, and elevated serum tyrosine levels. Patients are often misdiagnosed with herpes simplex keratitis. We report on a a boy from Brazil who presented with bilateral keratitis secondary to RHS, which had earlier been misdiagnosed as herpes simplex keratitis...
November 10, 2016: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/27830086/active-pedicle-epithelial-flap-transposition-combined-with-amniotic-membrane-transplantation-for-treatment-of-nonhealing-corneal-ulcers
#20
Ting Zhang, Yuexin Wang, Yanni Jia, Dongle Liu, Suxia Li, Weiyun Shi, Hua Gao
Introduction. The objective was to evaluate the efficacy of active pedicle epithelial flap transposition combined with amniotic membrane transplantation (AMT) in treating nonhealing corneal ulcers. Material and Methods. Eleven patients (11 eyes) with nonhealing corneal ulcer who underwent the combined surgery were included. Postoperatively, ulcer healing time was detected by corneal fluorescein staining. Visual acuity, intraocular pressure, surgical complications, and recurrence were recorded. Corneal status was inspected by the laser scanning confocal microscopy and anterior segment optical coherence tomography (AS-OCT)...
2016: Journal of Ophthalmology
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