Lyme disease

J Evans1

  • 1Section of Rheumatology, Yale University School of Medicine, New Haven, CT 06510.

Insights

Lyme disease, a common tick-borne illness caused by Borrelia burgdorferi, presents diverse symptoms and genospecies. Understanding its pathogenesis and developing vaccines are key to managing this infection.

Area of Science:

  • Medical Entomology
  • Infectious Diseases
  • Bacteriology

Background:

  • Lyme disease is the most prevalent arthropod-borne infection in the United States.
  • Established foci of Borrelia burgdorferi are primarily in the Northeast, Midwest, and California.
  • Borrelia burgdorferi exhibits phenotypic and genotypic diversity, leading to classification into three genospecies.

Purpose of the Study:

  • To explore the diversity of Borrelia burgdorferi and its impact on disease expression.
  • To review the expanding clinical features of Lyme disease, including atypical presentations.
  • To discuss advancements in understanding Lyme arthritis pathogenesis, infection risk assessment, and vaccine development.

Main Methods:

  • Literature review of Borrelia burgdorferi diversity and Lyme disease manifestations.
  • Analysis of clinical features, including neuroborreliosis and Lyme arthritis.
  • Examination of recent progress in risk assessment and vaccine research.

Main Results:

  • Borrelia burgdorferi genospecies diversity may correlate with varied disease presentations.
  • Clinical manifestations can include flulike illness without erythema migrans.
  • Intrathecal antibody responses may persist post-antibiotic therapy in neuroborreliosis.

Conclusions:

  • Further understanding of Lyme arthritis pathogenesis is crucial for treatment strategies.
  • Advances in tick bite risk assessment and vaccine development offer potential solutions for public health concerns.
  • Continued research into Borrelia burgdorferi diversity and Lyme disease is essential.

Related Concept Videos

Bacterial Phylum Spirochaetes01:30

Bacterial Phylum Spirochaetes

Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased by a...
Rocky Mountain Spotted Fever01:26

Rocky Mountain Spotted Fever

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.
Plague01:24

Plague

Plague is a highly virulent zoonotic disease caused by Yersinia pestis, a Gram-negative, facultatively anaerobic coccobacillus. This pathogen primarily circulates among rodent populations and is transmitted to humans through the bite of infected fleas. Additional transmission routes include direct contact with infected animal tissue or inhalation of respiratory droplets from individuals with pneumonic plague. These multiple transmission pathways highlight the bacterium’s potential for rapid...
Rabies01:28

Rabies

Rabies is a lethal zoonotic disease caused by a single-stranded, negative-sense RNA virus of the Lyssavirus genus, within the family Rhabdoviridae. Its primary mode of transmission to humans is through bites or saliva-contaminated scratches from infected mammals such as dogs, bats, raccoons, or foxes. Transmission can also occur if infectious saliva contacts abraded skin or intact mucous membranes, including the conjunctiva.Viral Entry and Early ReplicationOnce introduced at the bite or scratch...
American Trypanosomiasis01:22

American Trypanosomiasis

Chagas disease, or American trypanosomiasis, is a vector-borne parasitic infection caused by Trypanosoma cruzi, a flagellated protozoan (kinetoplastid) of the family Trypanosomatidae. The disease is endemic in Latin America, although cases are increasingly reported worldwide due to human migration. Transmission most commonly occurs when feces of infected triatomine bugs contaminate bite wounds or mucosal surfaces; additional routes include congenital, transfusional, transplant-related, and oral...
Encephalitis ll: Pathophysiology01:26

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...