Final answer:
Hydatid cysts in the lung are linked to hydatid disease, caused by Echinococcus granulosus. These cysts may cause respiratory issues and severe allergic reactions if ruptured.
Step-by-step explanation:
The image of a hydatid cyst in the lung is related to hydatid disease (cystic echinococcosis), an infection caused by the larval stage of the tapeworm Echinococcus granulosus. This condition occurs when E. granulosus eggs, usually passed in the feces of dogs, are ingested by humans and hatch in the small intestine. The released larvae then invade the intestinal wall and through the circulatory system, form cysts primarily in the lungs and liver. These cysts grow slowly and often remain unnoticed until they are large enough to cause symptoms. Should a cyst burst, there is a high risk of anaphylaxis, which is a severe allergic reaction. In the lungs, the presence of hydatid cysts can lead to breathing difficulties and other pulmonary complications.