Vaccination with meningococcal outer membrane vesicles carrying Borrelia OspA protects against experimental Lyme borreliosis

Vaccine. 2021 Mar 31:S0264-410X(21)00363-7. doi: 10.1016/j.vaccine.2021.03.059. Online ahead of print.ABSTRACTCurrently there is no human vaccine against Lyme borreliosis, and most research focuses on recombinant protein vaccines, as such a vaccine has been proven to be successful in the past. The expression of recombinant antigens in meningococcal Outer Membrane Vesicles (OMVs), with the OMV functioning both as adjuvant and delivery vehicle, greatly enhances their potential. Immunization studies in mice have shown that OMV-based vaccines can protect against various pathogens and an OMV-based meningococcal vaccine is approved and available for human use. Because of its surface localization in Borrelia and the detailed knowledge regarding its immunogenicity and structure, OspA was chosen as a suitable lipoprotein to be tested as an OMV-based vaccine against Lyme borreliosis. We have previously shown that the OMV-OspA vaccine was immunogenic in mice and here we assessed the efficacy of OMV-OspA. We generated a second-generation OMV-OspA vaccine and vaccinated C3H/HeN mice with (EDTA extracted) meningococcal OMVs expressing OspA from B. burgdorferi strain B31. The adjuvant effect of empty OMVs on recombinant OspA was tested as well. We subsequently challenged mice with a subcutaneous injection of B. burgdorferi. Average antibody end-point titers against the OspA-OMV construct were high, although lower compared to the antibodies raised against recombinant OspA. Interestingly, ant...
Source: Vaccine - Category: Allergy & Immunology Authors: Source Type: research

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Preema Sinha, Bhavni Oberoi, Yadvendra S Sirohi, Aradhana Sood, Saikat BhattacharjeeNeurology India 2020 68(4):916-918 Lyme disease is a multi-organ infectious disease caused by the spirochete “Borrelia burgdorferi,” and transmitted by the “Ixodes” tick. Early disseminated Lyme disease can have varied central nervous system manifestations ranging from meningitis to radiculopathy and cranial neuropathy. If not suspected, misdiagnosis or delayed diagnosis can prove to be fatal. Erythema migrans is the most common clinical presentation, thereby, making dermatological examination extremely crucial in e...
Source: Neurology India - Category: Neurology Authors: Source Type: research
Conclusions: In children, NB more frequently presented as meningitis, and in adults in the form of Bannwarth’s syndrome. CSF pleocytosis in children with NB was higher than in adults, while the protein concentration in children was lower. Outcomes in children and adults were favorable and did not differ after standard NB treatment.
Source: The Pediatric Infectious Disease Journal - Category: Infectious Diseases Tags: Original Studies Source Type: research
We report a case of suspected Lyme neuroborreliosis (LNB) where the patient's sole symptom was chronic, intermittent episodes of unilateral ear pain. This case was unusual because this patient did not show any other neurological or extraneurological symptoms of Lyme disease. LNB is a manifestation of infection by Borrelia burgdorferi spirochetes that can manifest in a number of different clinical presentations depending on the nervous system dissemination of the bacteria. Most commonly, these neurological findings present as peripheral nerve radiculopathies, but rarer involvement of the central nervous system (CNS) can...
Source: Journal of Global Infectious Diseases - Category: Infectious Diseases Authors: Source Type: research
Lyme disease is caused by a tick-borne bacterium Borrelia sp. This zoonotic infection is common in the Northern Hemisphere, e.g., Europe. Clinical presentation may involve multisystem symptoms and depends on the stage of the disease. The involvement of nervous system in Lyme disease is commonly referred to as neuroborreliosis. Neuroborreliosis may involve meningitis, mononeuritis multiplex, or cranial neuritis including the inflammation of vestibulocochlear nerve. In the late or chronic stage of Lyme disease, vestibular involvement may be the sole presentation, although such cases are rare. Our study was designed to presen...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
ConclusionThe hospital discharge register was unsuitable for surveillance of neuroborreliosis, whereas laboratory-based reporting was a feasible alternative. In 2018, the European Commission included Lyme neuroborreliosis on the list of diseases under epidemiological surveillance. PMID: 31115310 [PubMed - in process]
Source: Euro Surveill - Category: Infectious Diseases Authors: Tags: Euro Surveill Source Type: research
We report nine cases of pediatric neuroborreliosis collected by the National Observatory of Pediatric Bacterial Meningitis in France between 2001 and 2012. The nine children, aged 4-13 years, were identified in northern and eastern France and had the following clinical features: meningeal irritation alone or with facial palsy, or isolated facial palsy. All cases showed anti-Borrelia antibodies in cerebrospinal fluid or serum, or with a positive Borrelia PCR in the CSF. The outcome was favorable in all cases after a 2- to 3-week course of third-generation cephalosporin. On the basis of these nine pediatric cases, this study...
Source: Archives de Pediatrie - Category: Pediatrics Authors: Tags: Arch Pediatr Source Type: research
We report the case of a 9-year-old girl who suffered from headaches for several days and was shown to have opsoclonus and left peripheral facial palsy. Work-up excluded the diagnosis of neuroblastoma, but CSF analysis showed aseptic meningitis, and serology for Borrelia burgdorferi (Lyme) was positive. The outcome was favorable with complete regression of symptoms after treatment with ceftriaxone 2g/day for 3 weeks. Although rare, the diagnosis of Lyme neuroborreliosis must be raised in the presence of isolated opsoclonus, particularly if the clinical picture is incomplete and if other features, such as peripheral fac...
Source: Archives de Pediatrie - Category: Pediatrics Authors: Tags: Arch Pediatr Source Type: research
We report rare manifestation of a common disease and emphasize the importance of considering LD in the differential diagnosis of acute transverse myelitis, particularly in residents of endemic areas.
Source: IDCases - Category: Infectious Diseases Source Type: research
Neurologic manifestations of nervous system infection with Borrelia burgdorferi, Borrelia garinii, and Borrelia afzelii are qualitatively similar, and include lymphocytic meningitis, cranial neuritis, radiculoneuritis, and other focal or multifocal mononeuropathies. Parenchymal central nervous system (CNS) infection occurs rarely. Neurobehavioral changes are common, but are rarely evidence of CNS infection. Diagnosis requires likely exposure and a finding with high diagnostic positive predictive value, specifically erythema migrans, or laboratory support, typically positive 2-tiered serologic testing. CNS infection is ofte...
Source: Neurologic Clinics - Category: Neurology Authors: Source Type: research
B. miyamotoi was detected in Ixodes scapularis ticks in Connecticut in 2001 [2], but the first human case in the United States was not reported until 2013 [3]. Unlike with Lyme disease, patients in the United States with B. miyamotoi infections typically do not have skin lesions and instead present with a non-specific febrile illness, potentially associated with leukopenia, thrombocytopenia and elevated liver function tests [4]. Highly immunocompromised patients may develop chronic meningitis [3].
Source: The American Journal of Medicine - Category: General Medicine Authors: Source Type: research
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