List of Bacterial Diseases transmitted by insects

Insects act as a vector and are responsible for the transmission of various infectious diseases from the reservoirs to humans. In this blog post you can find information regarding bacterial diseases transmitted by insects. Fleas, ticks and lice are the common insects.
Ticks alone are responsible for the transmission of Lyme disease, Rocky Mountain spotted fever, Ehrlichiosis, relapsing fever and tularemia.

  1. Plague: Plague is caused by a bacterium Yersinia pestis. Rat fleas are responsible for its transmission from the reservoir (eg. Rats, prairie dogs) to human.
  2. Tularemia: Tularemia is an infectious disease caused by Francisella tularensis. F. tularensis is a parasite of wild animals. Ticks (Dermacentor) transmits this pathogen from animals such as rabbits to humans.
  3. Lyme disease: Lyme disease is caused by a spirochetes Borrelia burgdorferi. It is transmitted from mice to human by ticks (Ixodes).
  4. Relapsing Fever: Borrelia recurrentis is a causative agent of relapsing fever. It is transmitted from infected person to the susceptible one by lice.
  5. Rocky Mountain Spotted Fever: This disease is caused by Rickettsia rickettsii. The bite of ticks (dermacentor) transmits this disease from dogs, rodent to humans. Dermacentor ticks also acts as a reservoir.
  6. Ehrlichiosis: Ehrlichiosis disease is caused by a Rickettsias, Ehrlichia chafeensis.  The reservoir of this bacterium is dogs. Ticks (dermacentor) is the insect vector responsible for disease transmission.

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