👉 Pleurocystic leishmaniasis is a parasitic infection caused by the Leishmania donovani parasite, which can infect all seven types of nematodes (roundworms). It primarily affects humans but also affects animals and fish. Symptoms include fever, fatigue, weight loss, joint pain, abdominal cramps, jaundice, and anemia. Treatment involves antivenom injection and medication to control the infection.