Dog tick (Rhipecephalus) causing Lyme disease in an adult human.

Lyme disease is a tick-borne multisystem disorder transmitted by the family of Ixodes and caused by a spirochete, . An early manifestation of the disease presents with skin lesions typically called Erythema chronicum migrans (ECM). Doxycycline should be the antibiotic of choice used for its treatment.

Primary hepatic tuberculosis presenting as fever of unknown origin diagnosed by Positron emission tomography/computed tomography scan (PET/CT).

Tuberculosis (TB), especially extrapulmonary tuberculosis (EPTB), is an important cause of fever of unknown origin (FUO) in areas endemic to TB. Liver involvement in TB in the absence of miliary TB is rare. A definitive diagnosis of primary hepatic TB can be challenging and relies on the histological and/or bacteriological findings of the liver tissue obtained by biopsy.