Wuchereria bancrofti is a parasitic roundworm that causes lymphatic filariasis, commonly known as elephantiasis. It is transmitted by mosquitoes and infects over 120 million people globally, causing swelling and damage to the lymphatic system over time. The adult worms live in the human lymph vessels and can cause lymphedema, elephantiasis, and tropical pulmonary eosinophilia syndrome in some infected individuals. Diagnosis involves blood sampling to look for microfilariae or detect circulating filarial antigens, while treatment consists of antifilarial drugs like diethylcarbamazine or ivermectin. Prevention focuses on avoiding mosquito bites through protective clothing and repellents