A genus of threadlike parasitic worms. B. malayi infects man throughout southeast Asia, causing filariasis and elephantiasis (especially of the feet and legs). B. pabangi, a parasite of wild cats and domestic animals, produces an allergic condition in man, with coughing, breathing difficulty, and an increase in the umber of eosinophils in the blood. Brugia undergoes part of its development in mosquitoes of the genera Anopheles and Mansonia, which transmit the parasite from host to host.