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Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
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Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
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Detecting the Lyme Disease Spirochete, Borrelia Burgdorferi, in Ticks Using Nested PCR
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Published on: February 4, 2018

Lyme disease--current state of knowledge.

Roland Nau1, Hans-Jürgen Christen, Helmut Eiffert

  • 1Geriatrisches Zentrum, Evangelisches Krankenhaus Göttingen-Weende, Abteilung für Neurologie, Universitätsklinikum Göttingen, Göttingen, Germany. rnau@gwdg.de

Deutsches Arzteblatt International
|June 30, 2009
PubMed
Summary

Lyme disease, caused by Borrelia burgdorferi, is common in Europe. Prompt diagnosis and antibiotic treatment lead to favorable outcomes, with most neuroborreliosis cases resolving without lasting effects.

Keywords:
Lyme diseaseantibioticborreliosislaboratory diagnosistick bite

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Feeding of Ticks on Animals for Transmission and Xenodiagnosis in Lyme Disease Research
08:23

Feeding of Ticks on Animals for Transmission and Xenodiagnosis in Lyme Disease Research

Published on: August 31, 2013

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Epidemiology

Background:

  • Lyme disease is the most prevalent tick-borne illness in Europe, caused by Borrelia burgdorferi.
  • Its discovery enabled diagnosis and antibiotic treatment but also led to overdiagnosis of non-specific symptoms.
  • Understanding Borrelia burgdorferi prevalence and manifestations is crucial for accurate diagnosis and management.

Purpose of the Study:

  • To review the diagnosis and treatment of Lyme disease in Europe.
  • To differentiate between confirmed Lyme disease and suspected non-specific symptoms.
  • To provide an overview of current diagnostic and therapeutic guidelines.

Main Methods:

  • A selective literature review was performed.
  • National and international guidelines on Lyme disease were included.
  • The review focused on epidemiology, clinical manifestations, diagnosis, and treatment.

Main Results:

  • Borrelia burgdorferi sensu lato is found in 5-35% of Ixodes ricinus ticks in Germany, with regional variations in genospecies.
  • Erythema migrans is the most common symptom, followed by neuroborreliosis, arthritis, and skin conditions.
  • Diagnosis relies on clinical symptoms and antibody detection; treatment varies by manifestation and patient age, with doxycycline or amoxicillin for erythema migrans and cephalosporins for neuroborreliosis.

Conclusions:

  • Appropriate antibiotic therapy ensures a favorable prognosis for Lyme disease.
  • Approximately 95% of neuroborreliosis cases resolve without long-term sequelae.
  • When chronic borreliosis is suspected, alternative diagnoses must be rigorously excluded.