﻿IX, B, 2 Sanitary Survey in Mindoro 179 



function of the internal organs of secretion. This condition 

 of affairs is intimately associated with myocardial changes, and 

 it is altogether probable, although not an experimentally sub- 

 stantiated fact, that toxic conditions result from this general 

 stasis which have positive effect in myocarditis in addition to 

 the mechanical effects on the valves as a result of some cardiac 

 dilatation. 



Applicants for employment who have valvular diseases of the 

 heart or show circulatory incompetency in any form should 

 be excluded and not allowed to emigrate to Mindoro. 



BERIBERI 



Examination of 1,110 persons with reference to the incidence 

 of beriberi gives the following result: 



Positive 3 



Doubtful 16 



Negative 1,091 



Total 1,110 



In addition to the findings in this tabulation, we are creditably 

 informed that at no time in the history of this estate has beriberi 

 assumed an important role among the disease conditions. This 

 is rather striking in view of the modern conception of the rela- 

 tionship of polished rice to this disease. 



The development of Mindoro being in a very elementary stage, 

 the local supply of fish and other foodstuffs is mostly imported 

 from Manila and adjacent islands. 



The diet of the people of the San Jose Estate consists almost 

 entirely of polished rice, fish, and a few vegetables and condi- 

 ments. In other words, the diet is about as poor as that of any 

 class of Filipinos in the Islands. 



HOOKWORMS 



stool examinations were made in only 58 cases, and 28 or 

 48.27 per cent of these were found infected. Most of these 

 infections were light in character, and clinical inefficiency in 

 these patients was but little, if at all, lower than the general 

 average. We feel confident that hookworm infection at the 

 present time is a small factor in the clinical inefficiency of em- 

 ployees of the San Jose Estate. 



CLINICAL INEFFICIENCY 



The general physiological efficiency of the laborers and other 

 inhabitants of San Jose is very low, and it is believed that 50 



