268 



GARRISON, LEYNES, AND LLAMAS. 



Table 5. — Proportion of ihe popxdation ewumined for irilestinul parasites in each 



sex and age group. 



Ago groups (years). 



Males. ; Females. 



Total. 



In pop- 

 ula- 

 tion. 



Ex- 

 am- 

 ined. 



Per 

 cent 

 exam- 

 ined. 



In pop- 

 ula- 

 tion. 



Ex- 

 am- 

 ined. 



Per 

 cent 

 exam- 

 ined. 



In pop- Ex- 

 ula- am- 

 tion. ined. 



Per 

 cent 

 exam- 

 ined. 



Under 2 . 



198 

 312 

 300 

 245 

 735 

 611 

 367 



37 

 53 



50 



39 



120 



120 



71 



18.7 

 17.0 

 18.7 

 7.8 

 16.3 

 19.6 

 19 .^ 



213 



278 

 347 

 247 

 889 

 572 

 343 



36 

 47 

 71 

 34 



16.9 

 16.9 

 20. 5 

 l.q 7 



411 i 73 

 590 ' 100 

 647 127 



17.8 

 16.9 

 1<I r, 



2 to 4 



5 to 9 



10 to 14 



492 53 10-8 i 



15 to 29- 



107 1''-0 



1,624 227 



1,183 2.50 



710 137 



11.0 

 21.1 

 19. 3 



! 30 to 49 _ 



130 

 66 



22.7 

 19.2 



50 and over 



, Under 15 



1 



1,055 

 1,713 



165 

 311 



1.5.6 

 18.2 



1,085 i 188 ! 17.3 



2, 140 , 353 

 3,517 i 614 



16.5 

 17.5 



15 and over 



1,804 303 



16.8 



Total population 



2,768 



476 j 17.2 



1 



2,889 1 491 



17.0 



5,6.57 967 



17.0 i 



111 order to determine approximately what changes would occur by 

 substituting in our tables hypothetical figures obtained by raising or lower- 

 ing these disproportionately represented groups so that each group exam- 

 ined represented 17 per cent of that group in the general population, 

 assuming the same rate of infection to be maintained, a hypothetical 

 table was prepared and it was found that the number of persons infected, 

 the number of infections per 100 persons, and the rate of infection with 

 each parasite separately was changed by less than 1 per cent in each case. 



With I'sgard to sex and age therefore, there was no selection among 

 the persons examined which materially influences the results obtained. 



Division of labor in the community was so incompletely developed that 

 no classification by occupation is of much value. Eiee farming and 

 fishing are the industries almost exclusively followed, and though a man 

 might pronounce himself a carpenter, or a musician, as frequently was the 

 case, upon inquiry it would nearly always be found that a certain amount 

 of his time would be spent as a fisherman or in the rice paddies. Xeither 

 was it possible to definitely .separate fishermen from farmers as manv^ 

 were both. Occupation, therefore, was for the most part a question of 

 age or sex and any material selection by occupation would appear under 

 those heads. 



A very large percentage of the persons who attended the clinic came 

 with no complaint or with some indefinite or imaginary one. Many 

 came in company with sick friends. From as many as possible of these 

 healthy persons, as well as from the sick, specimens of fasces were exam- 

 ined. In addition, receptacles for specimens of stools were distributed 

 promiscuously through the town either by the town officials or by members 

 of tlie expedition as the census was taken. In other words, from the 



