The infectious complications after lung transplantation have been stud
ied in 26 patients suffering from mucoviscidosis who had transplants i
n the Ile-de-France between July 1987 and October 1990. We counted 99
infections (74 bacterial infections, 23 viral infections and two funga
l inffections) during a cumulative observation period of 127 months. T
he majority of the infections (48%) were localised to the grafted lung
. These infections were responsible for 61 % of deaths (50% secondary
to bacterial infections and 11% to viral infections). The risk of infe
ction remains even after a considerable time after transplantation in
this series. These studies underline the importance of infections comp
lications in the mortality and morbidity of lung transplant patients s
uffering from mucoviscidosis.