Beri-beri, which in 1906 caused sixty-eight deaths, has gradually disappeared.

The hookworm disease, ankylostomiasis, has steadily decreased.

From the very outset, malaria has been taken as the measure of sanitary efficiency.

Throughout the French occupation it was the chief enemy to be considered, not only because of its fatality, but on account of the prolonged incapacity following infection.

In 1906, out of every 1000 employees there were admitted to the hospital from malaria 821; in 1907, 424; in 1908, 282; in 1912, 110; in 1915, 51; in 1917, 14.