Write scientific names of the two species of filarial worms causing filariasis. How do they affect the body of infected persons ? How does the disease spread?

• Lymphatic filariasis is caused by infection with parasites, Wuchereria bancrofti, Brugia malayi.
• These worms occupy the lymphatic system, including the lymph nodes; in chronic cases, these worms lead to the syndrome of elephantiasis.
• Infection occurs when filarial parasites are transmitted to humans through mosquitoes.
• Infection is usually acquired in childhood causing hidden damage to the lymphatic system.