<unk>  a group of diseases caused by louse-borne bacteria. The name comes from the Greek<unk> , meaning smoky or lazy, describing the state of mind of those affected with<unk> . Rickettsia is endemic in rodent hosts, including mice and rats, and spreads to humans through mites, fleas and body lice.  The arthropod vector flourishes under conditions of poor hygiene, such as those found in prisons or refugee camps, amongst the homeless, or until the middle of the 20th century, in armies in the field. In tropical countries,<unk>  is often mistaken for dengue fever.
Typhus
Sulcus 
Laryngitis
Typhlitis
Trigonitis
Pharyngitis
Tonsillitis
Croup