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Brugia malayi

Common name. Malayan filaria

Disease. Malayan filariasis

Geographic distribution. The Philippines, Indonesia, Sri Lanka, Vietnam, Thailand, China, Malaysia and in specific parts of Korea.

Life cycle. The Anopheles, Aedes, Mansonia and Armigeres species of mosquitoes serve as the intermediate host and vectors of B. malayi. All other respects of the life cycle are basically the same as those of W. bancrofti.

Morphology. The adult worms of B. malayi resemble those of W. bancrofti measuring 50㎜ (female) and 25㎜ (male) in length. The typical B. malayi microfilaria possesses a sheath, a round anterior end, and numerous nuclei. The characteristic that distinguishes it from the other sheathed organisms is the presence of two distinct nuclei on the tip of the pointed tail.

Pathology and Clinical Symptoms. The pathology and clinical symptoms of B. malayi infection mimic those of W. bancrofti infection.

Diagnosis. See W. bancrofti.

Treatment. See W. bancrofti.

Prevention. See W. bancrofti.


Microfilaria of Brugia malayi. Perpheral blood thick smear and Giemsa srain, X 450.

Yong Suk Ryang


Collecting mosquito larvae from rock pools along the coast of the Heugsan Island, Korea. Aedes togoi transmits filaria, Brugia malayi at the area.

Tai Soon Yong


. The patient from a remote island in southwestern sea of Korea had suffered from recurrent painful swelling of the extremities for more than 30 years, which resulted in elephantiasis finally. Right side is more severe than the left in this photo.

Tai Soon Yong


Elephantiasis of legs due to Brugia malayi. The patient from a remote island in southwestern sea of Korea had suffered from recurrent painful swelling of both legs for more than 30 years, which resulted in elephantiasis finally. Right side is more severe than the left in this photo.

Tai Soon Yong