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Klontz EH, Chowdhury N, Branda JA. Laboratory Testing for Powassan Virus: Past, Present, and Future. J Infect Dis 2024; 230:S70-S75. [PMID: 39140722 DOI: 10.1093/infdis/jiae197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2024] Open
Abstract
Powassan virus is a tick-borne flavivirus that can cause severe neuroinvasive disease, with areas of endemicity in the Northeast and Midwest United States, Canada, and Russia. Diagnosis is challenging and relies on a high index of suspicion and choosing the right test based on duration of infection and the patient's immune status. This review covers laboratory testing for Powassan virus, including historical considerations, modern options, and methods being developed in the research space.
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Affiliation(s)
- Erik H Klontz
- Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Pathology, Harvard Medical School, Boston, Massachusetts, USA
| | - Navid Chowdhury
- Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - John A Branda
- Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Pathology, Harvard Medical School, Boston, Massachusetts, USA
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Sullivan MD, Glose K, Sward D. Tick-Borne Illnesses in Emergency and Wilderness Medicine. Emerg Med Clin North Am 2024; 42:597-611. [PMID: 38925777 DOI: 10.1016/j.emc.2024.02.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2024]
Abstract
This review highlights the causative organisms, clinical features, diagnosis, and treatment of the most common tick-borne illnesses in the United States, including Lyme disease, Rocky Mountain spotted fever, anaplasmosis, ehrlichiosis, tularemia, Powassan virus, and alpha-gal syndrome. Tick bite prevention strategies and some basic tick removal recommendations are also provided.
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Affiliation(s)
- Michael D Sullivan
- Department of Emergency Medicine, University of Maryland Medical Center, 6th Floor, Suite 200, 110 South Paca Street, Baltimore, MD 21201, USA
| | - Kyle Glose
- Department of Emergency Medicine, University of Maryland Medical Center, 6th Floor, Suite 200, 110 South Paca Street, Baltimore, MD 21201, USA
| | - Douglas Sward
- Department of Emergency Medicine, University of Maryland School of Medicine, 6th Floor, Suite 200, 110 South Paca Street, Baltimore, MD 21201, USA.
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Ansari MA, Nguyen TT, Kocurek KI, Kim WTH, Kim TK, Mulenga A. Recombinant Ixodes scapularis Calreticulin Binds Complement Proteins but Does Not Protect Borrelia burgdorferi from Complement Killing. Pathogens 2024; 13:560. [PMID: 39057787 PMCID: PMC11280304 DOI: 10.3390/pathogens13070560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 06/27/2024] [Accepted: 06/28/2024] [Indexed: 07/28/2024] Open
Abstract
Ixodes scapularis is a blood-feeding obligate ectoparasite responsible for transmitting the Lyme disease (LD) agent, Borrelia burgdorferi. During the feeding process, I. scapularis injects B. burgdorferi into the host along with its saliva, facilitating the transmission and colonization of the LD agent. Tick calreticulin (CRT) is one of the earliest tick saliva proteins identified and is currently utilized as a biomarker for tick bites. Our recent findings revealed elevated levels of CRT in the saliva proteome of B. burgdorferi-infected I. scapularis nymphs compared to uninfected ticks. Differential precipitation of proteins (DiffPOP) and LC-MS/MS analyses were used to identify the interactions between Ixs (I. scapularis) CRT and human plasma proteins and further explore its potential role in shielding B. burgdorferi from complement killing. We observed that although yeast-expressed recombinant (r) IxsCRT binds to the C1 complex (C1q, C1r, and C1s), the activator of complement via the classical cascade, it did not inhibit the deposition of the membrane attack complex (MAC) via the classical pathway. Intriguingly, rIxsCRT binds intermediate complement proteins (C3, C5, and C9) and reduces MAC deposition through the lectin pathway. Despite the inhibition of MAC deposition in the lectin pathway, rIxsCRT did not protect a serum-sensitive B. burgdorferi strain (B314/pBBE22Luc) from complement-induced killing. As B. burgdorferi establishes a local dermal infection before disseminating to secondary organs, it is noteworthy that rIxsCRT promotes the replication of B. burgdorferi in culture. We hypothesize that rIxsCRT may contribute to the transmission and/or host colonization of B. burgdorferi by acting as a decoy activator of complement and by fostering B. burgdorferi replication at the transmission site.
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Affiliation(s)
- Moiz Ashraf Ansari
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA; (M.A.A.); (T.-T.N.); (W.T.H.K.)
| | - Thu-Thuy Nguyen
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA; (M.A.A.); (T.-T.N.); (W.T.H.K.)
| | | | - William Tae Heung Kim
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA; (M.A.A.); (T.-T.N.); (W.T.H.K.)
| | - Tae Kwon Kim
- Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA;
| | - Albert Mulenga
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA; (M.A.A.); (T.-T.N.); (W.T.H.K.)
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Klontz EH, Solomon IH, Turbett SE, Lemieux JE, Branda JA. Cerebrospinal fluid metagenomics has greatest added value as a test for Powassan virus among patients in New England with suspected central nervous system infection. Diagn Microbiol Infect Dis 2024; 108:116169. [PMID: 38295682 DOI: 10.1016/j.diagmicrobio.2023.116169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 12/19/2023] [Accepted: 12/27/2023] [Indexed: 02/27/2024]
Abstract
Cerebrospinal fluid (CSF) metagenomic next generation sequencing (mNGS) can detect diverse pathogens in patients with central nervous system infection. Due to its high cost and unclear clinical utility, it is typically reserved for patients with unrevealing routine workups. A multi-center retrospective analysis of real-world CSF mNGS was performed involving orders between 2017 and 2022 at a large New England healthcare system. CSF mNGS was performed 64 times with 17 positive results (27 %). In 11/17 positive samples (65 %), the infectious agent had not been previously detected using routine methods. Arboviruses (n = 8) were the most frequently detected agents, particularly Powassan virus (n = 6). Results changed therapy in 3/64 cases (5 %). Positive results were associated with immunodeficiency (p = 0.06), especially anti-B-cell therapy (p = 0.02), and earlier sample collection (p = 0.06). The association with compromised humoral immunity was stronger in the arbovirus and Powassan virus subgroups (p = 0.001), whose constituents were older than the overall cohort and had higher mortality rates.
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Affiliation(s)
- Erik H Klontz
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Isaac H Solomon
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Sarah E Turbett
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Jacob E Lemieux
- Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - John A Branda
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
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Gnanaprakasam R, Wormser GP, Keller M. Background seropositivity to Jamestown Canyon virus can lead to diagnostic confusion. Diagn Microbiol Infect Dis 2024; 108:116161. [PMID: 38219377 DOI: 10.1016/j.diagmicrobio.2023.116161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/11/2023] [Accepted: 12/12/2023] [Indexed: 01/16/2024]
Abstract
Background seropositivity rates for specific antibodies to Jamestown Canyon Virus (JCV) can exceed 25 % in certain geographic areas in the United States. This can potentially lead to diagnostic confusion, as apparently illustrated by a patient from New Jersey with Powassan virus encephalitis, who also tested positive for antibodies to JCV.
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Affiliation(s)
- Rachel Gnanaprakasam
- Infectious Diseases, Westchester Medical Center, 100 Woods Road, Valhalla, New York, 10595 USA
| | - Gary P Wormser
- New York Medical College, 40 Sunshine Cottage Road, Valhalla, New York, 10595, USA
| | - Marina Keller
- Infectious Diseases, Westchester Medical Center, 100 Woods Road, Valhalla, New York, 10595 USA; New York Medical College, 40 Sunshine Cottage Road, Valhalla, New York, 10595, USA.
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Zhong Z, Wang K, Wang J. Tick symbiosis. CURRENT OPINION IN INSECT SCIENCE 2024; 62:101163. [PMID: 38244689 DOI: 10.1016/j.cois.2024.101163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 12/29/2023] [Accepted: 01/12/2024] [Indexed: 01/22/2024]
Abstract
As obligate blood-feeders, ticks serve as vectors for a variety of pathogens that pose threats on both human and livestock health. The microbiota that ticks harbor play important roles in influencing tick nutrition, development, reproduction, and vector. These microbes also affect the capacity of ticks to transmit pathogens (vector competence). Therefore, comprehending the functions of tick microbiota will help in developing novel and effective tick control strategies. Here, we summarize the effects of main tick symbiotic bacteria on tick physiology and vector competency.
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Affiliation(s)
- Zhengwei Zhong
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, PR China; Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, PR China
| | - Kun Wang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, PR China; Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, PR China
| | - Jingwen Wang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, PR China; Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, PR China.
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Taylor-Salmon E, Shapiro ED. Tick-borne infections in children in North America. Curr Opin Pediatr 2024; 36:156-163. [PMID: 38167816 PMCID: PMC10932821 DOI: 10.1097/mop.0000000000001326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
PURPOSE OF REVIEW Because both incidence and awareness of tick-borne infections is increasing, review of major infections and recent advances related to their diagnosis and management is important. RECENT FINDINGS A new algorithm, termed modified two-tier testing, for testing for antibodies to Borrelia burgdorferi , the cause of Lyme disease, has been approved and may replace traditional two-tier testing. In addition, doxycycline is now acceptable to use for treatment of and/or prophylaxis for Lyme disease for up to 21 days in children of any age. Borrelia miyamotoi , a bacterium in the relapsing fever type of Borrelia, is the first of this type of Borrelia that is transmitted by hard-bodied ticks such as Ixodes scapularis. SUMMARY Awareness of these infections and advances in their diagnosis and treatment is important to assure the best outcomes for affected patients. Table 1 contains a summary of infections discussed.
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Affiliation(s)
- Emma Taylor-Salmon
- Department of Pediatrics, Yale School of Medicine
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
| | - Eugene D Shapiro
- Department of Pediatrics, Yale School of Medicine
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
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Finelli PF. MR Imaging Patterns and Prognosis in Powassan Virus Encephalitis. Neurologist 2024; 29:103-105. [PMID: 37839084 DOI: 10.1097/nrl.0000000000000533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
BACKGROUND Powassan virus (POWV) encephalitis is an arbovirus infection and the only tick-borne encephalitis serogroup which is present in mainland North America. The magnetic resonance (MR) imaging described with POWV encephalitis is varied, nonspecific, and limited in number, and as such, imaging patterns and outcomes with this arbovirus infection are not well appreciated. METHODS A case report and literature review of the MR imaging associated with POWV encephalitis and correlate of the MR pattern with outcome is considered. RESULTS The cerebellar dominant MR imaging pattern was identified in 50% of POWV encephalitis cases and was associated with a 60% fatality rate. POWV encephalitis with prominent cerebellar involvement on MR imaging responded to intravenous steroid. CONCLUSIONS A cerebellar dominant MR pattern in POWV encephalitis was common, associated with a poor prognosis, and recognition could change management from supportive to life-saving.
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Affiliation(s)
- Pasquale F Finelli
- Department of Neurology, Hartford Hospital and University of Connecticut School of Medicine, Hartford, CT
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Mendoza MA, Hass RM, Vaillant J, Johnson DR, Theel ES, Toledano M, Abu Saleh O. Powassan Virus Encephalitis: A Tertiary Center Experience. Clin Infect Dis 2024; 78:80-89. [PMID: 37540989 PMCID: PMC10810704 DOI: 10.1093/cid/ciad454] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/25/2023] [Accepted: 08/01/2023] [Indexed: 08/06/2023] Open
Abstract
BACKGROUND Powassan virus (POWV) is an emerging arthropod-borne flavivirus, transmitted by Ixodes spp. ticks, which has been associated with neuroinvasive disease and poor outcomes. METHODS A retrospective study was conducted at Mayo Clinic from 2013 to 2022. We included clinical and epidemiologic data of probable and confirmed neuroinvasive POWV cases. RESULTS Sixteen patients with neuroinvasive POWV were identified; their median age was 63.2 years, and 62.5% were male. Six patients presented with rhombencephalitis, 4 with isolated meningitis, 3 with meningoencephalitis, 2 with meningoencephalomyelitis, and 1 with opsoclonus myoclonus syndrome. A median time of 18 days was observed between symptom onset and diagnosis. Cerebrospinal fluid analysis showed lymphocytic pleocytosis with elevated protein and normal glucose in the majority of patients. Death occurred within 90 days in 3 patients (18.8%), and residual neurologic deficits were seen in 8 survivors (72.7%). CONCLUSIONS To our knowledge, this is the largest case series of patients with neuroinvasive POWV infection. We highlight the importance of a high clinical suspicion among patients who live in or travel to high-risk areas during the spring to fall months. Our data show high morbidity and mortality rates among patients with neuroinvasive disease.
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Affiliation(s)
- Maria Alejandra Mendoza
- Division of Public Health, Infectious Diseases, and Occupational Medicine News, Mayo Clinic, Rochester, Minnesota, USA
| | - Reece M Hass
- Departement of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - James Vaillant
- Division of Public Health, Infectious Diseases, and Occupational Medicine News, Mayo Clinic, Rochester, Minnesota, USA
| | - Derek R Johnson
- Departement of Radiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Elitza S Theel
- Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA
| | - Michel Toledano
- Departement of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - Omar Abu Saleh
- Division of Public Health, Infectious Diseases, and Occupational Medicine News, Mayo Clinic, Rochester, Minnesota, USA
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Anis H, Basha Shaik A, Karabulut E, Uzun M, Tiwari A, Nazir A, Uwishema O, Alemayehu A. Upsurge of Powassan virus disease in northeastern United States: a public health concern-a short communication. Ann Med Surg (Lond) 2023; 85:5823-5826. [PMID: 37915648 PMCID: PMC10617911 DOI: 10.1097/ms9.0000000000001313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 09/06/2023] [Indexed: 11/03/2023] Open
Abstract
Powassan virus (POWV) is a tick-borne Flavivirus primarily transmitted through ticks in North America which is a significant public health threat in the northeastern United States. POWV infection spans from Ontario to the Mid-Atlantic, Northeast, and Midwest regions in the USA. Climate change, ecological factors, and human-related changes, including shifts in migration and agriculture, contribute to the dissemination of POWV. Symptoms include sore throat, fatigue, headache, and severe neuroinvasive conditions. Specialized attention is required for diagnosing and managing. MRI scans detect central nervous system abnormalities, while neuromonitoring identifies metabolic distress. Severe cases may necessitate ICU hospitalisation with continuous monitoring. Prevention measures, such as awareness, controlling mammals, and protecting pets, reduce POWV infection risk. The recent outbreak of POWV in Maine, USA, highlights the importance of worldwide collaboration for prevention. With the global prevalence of POWV increasing due to climate and socioeconomic changes, implementing preventative measures and promoting awareness are crucial in reducing infection risk.
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Affiliation(s)
- Heeba Anis
- Oli Health Magazine Organization, Research, and Education, Kigali, Rwanda
- Deccan College of Medical Sciences,Hyderabad, Telangana
| | - Akbar Basha Shaik
- Oli Health Magazine Organization, Research, and Education, Kigali, Rwanda
- Deccan College of Medical Sciences,Hyderabad, Telangana
| | - Ece Karabulut
- Oli Health Magazine Organization, Research, and Education, Kigali, Rwanda
- Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Mert Uzun
- Oli Health Magazine Organization, Research, and Education, Kigali, Rwanda
- Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Angad Tiwari
- Oli Health Magazine Organization, Research, and Education, Kigali, Rwanda
- Maharani Laxmi Bai Medical College, Jhansi, Uttar Pradesh, India
| | - Abubakar Nazir
- Oli Health Magazine Organization, Research, and Education, Kigali, Rwanda
- Department of Medicine, King Edward Medical University, Pakistan
| | - Olivier Uwishema
- Oli Health Magazine Organization, Research, and Education, Kigali, Rwanda
- Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
- Clinton Global Initiative University, NY
| | - Abel Alemayehu
- Oli Health Magazine Organization, Research, and Education, Kigali, Rwanda
- Addis Ababa University, College of Health Science, School of Medicine, Addis Ababa, Ethiopia
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Bloch KC, Glaser C, Gaston D, Venkatesan A. State of the Art: Acute Encephalitis. Clin Infect Dis 2023; 77:e14-e33. [PMID: 37485952 DOI: 10.1093/cid/ciad306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Indexed: 07/25/2023] Open
Abstract
Encephalitis is a devastating neurologic disease often complicated by prolonged neurologic deficits. Best practices for the management of adult patients include universal testing for a core group of etiologies, including herpes simplex virus (HSV)-1, varicella zoster virus (VZV), enteroviruses, West Nile virus, and anti-N-methyl-D-aspartate receptor (anti-NMDAR) antibody encephalitis. Empiric acyclovir therapy should be started at presentation and in selected cases continued until a second HSV-1 polymerase chain reaction test is negative. Acyclovir dose can be increased for VZV encephalitis. Supportive care is necessary for other viral etiologies. Patients in whom no cause for encephalitis is identified represent a particular challenge. Management includes repeat brain magnetic resonance imaging, imaging for occult malignancy, and empiric immunomodulatory treatment for autoimmune conditions. Next-generation sequencing (NGS) or brain biopsy should be considered. The rapid pace of discovery regarding autoimmune encephalitis and the development of advanced molecular tests such as NGS have improved diagnosis and outcomes. Research priorities include development of novel therapeutics.
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Affiliation(s)
- Karen C Bloch
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Carol Glaser
- California Department of Public Health, Richmond, California, USA
| | - David Gaston
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Arun Venkatesan
- Department of Neurology, Johns Hopkins University, Baltimore, Maryland, USA
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Telford SR, Piantadosi AL. Powassan virus persistence after acute infection. mBio 2023; 14:e0071223. [PMID: 37338444 PMCID: PMC10470498 DOI: 10.1128/mbio.00712-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 05/04/2023] [Indexed: 06/21/2023] Open
Abstract
Survivors of Powassan encephalitis often have persistent neurological disease. A new mouse model replicates some elements of the human disease and demonstrates the presence of viral RNA in the brain as well as myelitis more than 2 mo after the acute infection. The related tick-borne encephalitis and West Nile Neuroinvasive Disease (WNND) also have common neurological sequelae, and models for these better-studied diseases provide evidence for prolonged virus, RNA, and inflammation in some cases, in addition to damage from the acute encephalitic disease. A better understanding of the biological basis for persistent signs and symptoms after Powassan encephalitis, currently a rare disease, could benefit from further studies of the more prevalent flaviviral encephalitides.
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Affiliation(s)
- Sam R. Telford
- Department of Infectious Disease and Global Health; Tufts Lyme Disease Initiative, Tufts University, North Grafton, Massachusetts, USA
| | - Anne L. Piantadosi
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
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