Is tick-borne fevers cocci bacilli or spirillum?

Tick-borne fevers can be caused by different types of microorganisms, including bacteria, viruses, and parasites. The specific causative agent varies depending on the geographical region and the tick species involved.

Here are the classifications of some common tick-borne fevers:

1. Bacteria:

a) Cocci:

- Anaplasmosis: Caused by the bacteria Anaplasma phagocytophilum, which is a Gram-negative coccus.

- Ehrlichiosis: Caused by bacteria of the genus Ehrlichia, which are Gram-negative cocci.

b) Bacilli:

- Tularemia: Caused by the bacterium Francisella tularensis, which is a Gram-negative coccobacillus.

2. Viruses:

- Tick-borne encephalitis (TBE): Caused by the TBE virus, which belongs to the Flavivirus genus.

- Crimean-Congo hemorrhagic fever (CCHF): Caused by the CCHF virus, which is a member of the Nairovirus genus.

- Colorado tick fever: Caused by the Colorado tick fever virus, which belongs to the Coltivirus genus.

3. Parasites:

- Babesiosis: Caused by the protozoan parasites of the genus Babesia.

- Lyme disease: Caused by the spirochete bacterium Borrelia burgdorferi.

Therefore, tick-borne fevers can be caused by cocci, bacilli, or spirillum (in the case of Lyme disease), depending on the specific microorganism responsible for the infection.