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Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...
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Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
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Bacterial meningitis typically begins when pathogens such as Neisseria meningitidis and Streptococcus pneumoniae colonize the nasopharynx and invade the bloodstream. This process is facilitated by bacterial virulence factors, such as polysaccharide capsules, which resist phagocytosis and complement-mediated killing. Less commonly, bacteria reach the central nervous system via contiguous spread from infections like otitis media or sinusitis, through congenital or acquired dural defects, or...
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Bacterial meningitis is a severe, life-threatening inflammation of the meninges, particularly the pia mater and arachnoid mater, affecting the subarachnoid space, ventricles, and cerebrospinal fluid (CSF). If untreated, it can lead to significant neurological complications or death.Causative AgentsCommon pathogens vary with age and immune status. In adults, major organisms include Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae. Streptococcus agalactiae (group B...
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Detecting the Lyme Disease Spirochete, Borrelia Burgdorferi, in Ticks Using Nested PCR
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[Lyme borreliosis].

P Herzer1, V Fingerle, H-W Pfister

  • 1Internistisch-rheumatologische Schwerpunktpraxis, Tal 6, 80331, München, Deutschland, peter.herzer@t-online.de.

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Summary
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Lyme borreliosis, a tick-borne illness affecting multiple systems, is diagnosed via clinical signs and serology. Antibiotic treatment is effective, and "chronic Lyme borreliosis" is often misapplied to unexplained symptoms.

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Area of Science:

  • Infectious Diseases
  • Microbiology
  • Tick-borne Illnesses

Context:

  • Lyme borreliosis is a significant public health concern caused by Borrelia burgdorferi sensu lato spirochetes.
  • Transmission occurs through infected tick bites, leading to multisystemic manifestations.
  • Accurate diagnosis is crucial for effective management and to prevent misattribution of symptoms.

Purpose:

  • To outline the key aspects of Lyme borreliosis diagnosis and treatment.
  • To clarify the etiology and transmission of the disease.
  • To address the misuse of the term 'chronic Lyme borreliosis'.

Summary:

  • Lyme borreliosis affects skin, nervous system, joints, and heart, caused by Borrelia spirochetes transmitted by ticks.
  • Diagnosis relies on clinical presentation and serological confirmation.
  • Antibiotic therapy is generally effective, with rare treatment-refractory cases.

Impact:

  • Highlights the importance of accurate Lyme borreliosis diagnosis.
  • Warns against the misdiagnosis and misuse of 'chronic Lyme borreliosis'.
  • Emphasizes the efficacy of standard antibiotic treatments for Lyme disease.