STUDY OF INTESTINAL PARASITES. 

 Tasj.e IX. — Age distribution of infections (females). 



87 



Age (years). 



Num- 

 ber 

 exam- 

 ined. 



Infected. 



Ascaris. 



Hookworm. 



Trichxiris. 



Num- 

 ber. 



Per 

 cent. 



Num- 

 ber. 



Per 

 cent. 



Num- 

 ber. 



Per 



cent. 



Num- 

 ber. 



Per 

 cent. 



Under 1 



11 



26 



87 



81 



69 



86 



75 



174 



247 



.514 



440 



178 



856 



1,132 



1 



16 



62 



75 



55 



74 



66 



157 



212 



445 



343 



151 



718 



939 



9.09 

 61.54 

 71.26 

 92.59 

 79.71 

 86.05 

 88.00 

 90.23 

 85.83 

 86.58 

 77.95 

 84.83 

 83.88 

 82.07 



1 



16 



60 



69 



50 



68 



61 



131 



182 



330 



233 



103 



638 



666 



9.09 

 61.54 

 68.97 

 85.19 

 72.46 

 79.07 

 81.33 

 75.29 

 73.68 

 64.19 

 52.95 

 57.87 

 74.53 

 58.83 





 3 



10 



13 



13 



20 



25 



80 



132 



282 



217 



99 



296 



598 













2 



4 



4 



4 



9 



16 



12 



50 



37 



25 



51 



112 



2.30 

 4.94 

 5.80 

 4.65 



12.00 

 9.20 

 4.86 

 9.73 

 8.41 



14.04 

 5.96 

 9.89 



1 



11. .54 

 11.49 

 16.05 

 18.84 

 23.26 

 33.33 

 45.98 

 53.44 

 54. 85^ 

 49.32 

 55.62 

 34.58 

 52.83 



2. _ 



3 ..- -- — 



4 



5 



6 



7 to 9 



10 to 14 - 



^5 to 30 - 



31 to 50 



Over 50 



Under 15 



15 and over . 





Age (years). 



Oxyuris. 



Txnia. 



Hymenolepis. 



Strongy- 

 loides. 



Total infections. 



Num- 

 ber. 



Per 

 cent. 



Num- 

 ber. 



Per 

 cent. 



Num- 

 ber. 



Per 

 cent. 



Num- 

 ber. 



Per 

 cent. 



Num- 

 ber. 



Per 

 cent. 



Under 1 





 1 

 

 1 

 1 

 5 

 2 

 5 

 4 



10 



8 



4 



19 



22 







 

 

 



1 





 

 

 

 6 

 9 

 8 

 1 

 23 







 

 

 



1 

 

 



1 





 

 

 



2 







1.45 

 0.57 



0.23 





 

 1 

 

 

 

 

 

 

 

 

 



1 









1 



20 



73 



87 



70 



97 



97 



233 



330 



678 



504 



239 



1,008 



1,491 



9.09 

 76. .2 

 83.91 

 107. 41 

 101. 45 

 112.79 

 129.33 

 133.91 

 133.60 

 131.91 

 114. 55 

 134. 27 

 117. 76 

 ^9R f,A 



1 



3.85 







2 





1.75 



3 



1.23 

 1.45 

 5.81 

 2.67 

 2.87 

 1.62 

 1.95 

 1.82 

 2.25 

 2.22 

 2.94 





4 



1.45 





5 





6 







7 to 9 







10 to 14 







15 to 30 



1.17 

 2.05 

 4.49 

 0.12 

 2.03 





31 to 50 





Over 50 





Under 15 . 



0.12 



15andover. 

























1 



Two infants, one of Si months, the other of 9 months, were infected with 

 Ascaris; another, of 9 months, with Ascaris and hookworm. 



The number of infections per 100 persons was greatest in the age 

 group 10 to 14 in the general findings and among the males and among 

 females over 50, namely, 141.41, 149.19 and 134.27, respectively. 



