The Importance of Secondary Infections in the Causation of Filarial Lymphangitis *Being a paper read at the Medical and Veterinary Research Section of the Indian Science Congress held at Madras in January 1929.

Of the different lesions caused by Filaria baiicrofti in man, filarial lymphangitis is the most common, and unfortunately the most troublesome affection. The actual mechanism by which filarial lymphangitis is brought about not hitherto been clearly understood. The authors have been engaged on a detailed study of the ;etiology of lymphatic obstruction in fi'ariasis during the past two years, both by a ?study of post-mortem material, and also from clinical experience with a large series of cases. During the course of these studies, it was found that lymphatic obstruction in filarial disease is produced in one of the following