👉 The term "theileria" is a medical condition that is characterized by an enlarged spleen. It can be caused by various factors such as infection, inflammation or genetic abnormalities. The symptoms of theileria include fever, chills, nausea and vomiting, abdominal pain, jaundice (yellowing of the skin) and jaundice, which may spread to other organs in the body. It is often associated with severe infections like hepatitis B or C, and it can be life-threatening