Pathogenesis of Relapsing Fever

Job Lopez1, Joppe W Hovius2, Sven Bergström3

  • 1Department of Pediatrics, Section of Tropical Medicine, Baylor College of Medicine and Texas Children's Hospital, Houston TX, USA.

Insights

Relapsing fever (RF) is caused by Borrelia bacteria, transmitted by ticks or lice. This review covers RF Borrelia transmission, taxonomy, pathogenesis, and immune evasion strategies.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Epidemiology

Background:

  • Relapsing fever (RF) is a group of diseases caused by Borrelia species.
  • Transmission occurs via soft ticks, body lice (Borrelia recurrentis), or hard ticks (Borrelia miyamotoi).
  • RF Borrelia possess pathogenic features enabling host invasion and dissemination.

Purpose of the Study:

  • To discuss the dynamics of vector acquisition and transmission of RF Borrelia.
  • To review taxonomic challenges and emerging species of RF Borrelia.
  • To explore pathogenesis, including symptomology, neurotropism, adhesion, and immune evasion.

Main Methods:

  • Review of existing literature on RF Borrelia.
  • Analysis of transmission dynamics and vector-host interactions.
  • Discussion of pathogenic mechanisms and immune evasion strategies.

Main Results:

  • RF Borrelia exhibit diverse transmission routes and vectors.
  • Taxonomic classification faces challenges due to newly isolated species globally.
  • Pathogenesis involves multiphasic antigenic variation for immune evasion.

Conclusions:

  • Understanding RF Borrelia transmission and pathogenesis is crucial for disease control.
  • Ongoing research into new species and evasion strategies is vital.
  • Future directions focus on managing this global infectious disease.

Related Concept Videos

Patterns of Fever01:26

Patterns of Fever

Before understanding the types and patterns of fever, it is essential to know its phases.
3.4K
Infection01:20

Infection

When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
10.1K
Stages of Infection01:26

Stages of Infection

Stages of infection describe what happens to a susceptible host once a pathogen invades the human body. The stages of infection are incubation, prodromal, illness, stage of decline, and convalescence. The incubation stage is the period from exposure to a pathogen until symptoms start. The infected person is unaware of impending illness as the pathogens grow and multiply within the body. The duration may vary depending on the type of infection. The incubation period of measles averages ten to...
62.9K
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...
315
Types of Fever01:25

Types of Fever

Fever can be triggered by several factors, including infections, nervous system disorders, certain cancers, blood diseases like leukemia, embolism, thrombosis, heatstroke, dehydration, surgical trauma, crushing injuries, and allergic reactions.
Here are the different types of fever:
812
Increased Body Temperature01:25

Increased Body Temperature

A body temperature above  38°C  (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in...
6.1K