All of the thirty-five hundred prisoners were ultimately examined, and intestinal parasites eradicated if present.

The death rate then dropped to thirteen to the thousand, and has remained at or near this figure up to the present time.
I have already referred to the discovery of the cause of beri-beri, and to the effect of the governor-general's order forbidding the use of polished rice in government institutions or by government organizations.
I subsequently made a strong effort to secure legislation imposing a heavy internal revenue tax on polished rice, thus penalizing its use.

I failed, but such effort will be renewed by some one, let us hope with ultimate success.
In Spanish days cholera, leprosy, smallpox and other dangerous communicable diseases were constantly reintroduced from without.

This is no longer the case.

The United States public health and marine hospital service has stretched an effective defensive line around the archipelago and has sent its outposts to Hongkong, Shanghai and Amoy, to prevent, so far as possible, the embarkation for Manila of persons suffering from such ailments.