Brucellosis is an anthropozoonotic infection, endemic in the Mediterranean region, the Middle East, Latin America and parts of Asia and Africa, that is caused by gram-negative coccobacilli of the genus <i>Brucella</i> transmitted through consumption of unpasteurized dairy products or through direct contact with infected animals, placentas or aborted fetuses. Brucellosis is characterized by fever, fatigue, malaise, headache, anorexia, weight loss, sweating, osteomuscular pain (joint and lumbar pain), and arthritis.

Yellow pigmentation of the skin due to bilirubin, which in turn is the result of increased bilirubin concentration in the bloodstream.