What is the cause of Echinococcus granulosus hydatid cyst?

Cystic echinocccosis (CE), also known as hydatid disease, is caused by infection with the larval stage of Echinococcus granulosus, a ~2–7 millimeter long tapeworm found in dogs (definitive host) and sheep, cattle, goats, and pigs (intermediate hosts).

What is the type of hydatid cyst of Echinococcus granulosus?

Cystic echinococcosis (CE) is the larval cystic stage (called echinococcal cysts) of a small taeniid-type tapeworm (Echinococcus granulosus) that may cause illness in intermediate hosts, generally herbivorous animals and people who are infected accidentally.

What is the most common site for hydatid cyst?

The kidney is the most common location in the urinary tract and has been reported in about 2-3% of all cases of the hydatid cyst. In many of the previous reports from other parts of the globe, the kidney is reported as the third common site of the hydatid cyst after the liver and lung.

How do humans get hydatid disease?

Human infection occurs when a person swallows tapeworm eggs. This may occur by patting a dog then touching your mouth, by kissing a dog, through contact with contaminated soil or through consuming food or water contaminated with dog faeces containing tapeworm eggs.

What are the symptoms of Echinococcus infection?


  • Pain in the upper right part of the abdomen (liver cyst)
  • Increase in size of the abdomen due to swelling (liver cyst)
  • Bloody sputum (lung cyst)
  • Chest pain (lung cyst)
  • Cough (lung cyst)
  • Severe allergic reaction (anaphylaxis) when cysts break open.

Who stages of hydatid cyst?

stage 1: homogeneously hypoechogenic cystic thin-walled lesion. stage 2: septated cystic lesion. stage 3: cystic lesion with daughter lesions. stage 4: pseudo-tumor lesion.

What is hydatid cyst?

Medical Definition of hydatid 1 : the larval cyst of a tapeworm of the genus Echinococcus that usually occurs as a fluid-filled sac containing daughter cysts in which scolices develop but that occasionally forms a proliferating spongy mass which actively metastasizes in the host’s tissues. — called also hydatid cyst.

How is Echinococcus treated?

Chemotherapy, cyst puncture, and PAIR (percutaneous aspiration, injection of chemicals and reaspiration) have been used to replace surgery as effective treatments for cystic echinococcosis. However, surgery remains the most effective treatment to remove the cyst and can lead to a complete cure.