56 



MOSQUITO ERADICATION 



1913 



1914 



1915 



1916 



Blood tests, per cent infected i 11 .76 1 3.79 



Mill physician's cases yearly 144 .00 85 . 00 



Cost of anti-mosquito work $725 . 50 



Per capita cost of work 1.21 



70.00 



$143.80 



0.24 



1.46 



A This blood test was made in May, 1914, but, as it represents the situation 

 before control work started, it is placed under 1913. 



CO-OPERATIVE DEMONSTRATION AT CROSSETT, ARK. 



Crossett, Ark., is a lumber town in the low part of the state. 

 The population in 1916 was estimated at 2,029. Work was 

 started there in May, 1916, under a co-operative arrangement 

 between the U. S. Public Health Service and the International 

 Health Board. The reduction in the incidence of malaria and 

 costs for the years 1916-17 are given in the tollowing table 1 : 



1915 



1916 



1917 



Blood tests, per cent infected 9.43 2.61 



Physicians' visits for malaria 2 , 502 . 00 741 . 00 



Cost of anti-mosquito work ! $2 , 506 . 40 



Per capita cost of work 1 . 24 



277.00 



,275.45 



0.63 



In 1917-18 further demonstrations were made in Hamburg, 

 Lake Village, Dermott, Monticello and Bauxite, Ark. The 

 reduction of calls for malaria ranged from 78.4 to 97.4 per cent 

 and the per capita costs from $0.46 to $1.45. 



WORK OF ST. LOUIS & SOUTHWESTERN RAILROAD 



During 1916, steps were taken by the St. Louis & Southwestern 

 Railroad to undertake measures for the control of what had been 

 observed to be an undue incidence of malaria among its employes. 

 It had been found that during the preceding 4 years, about 25 

 per cent of all admissions to the hospital at Texarkana had been 

 for malaria, an annual average of 640 cases having been treated 

 for about 5 days each; this was equivalent to about 4 per cent of 



1(< Malaria Control: A Report of Demonstration Studies,"and "Malaria 

 Control; Results Obtained by a Local Community," U. S. Public Health 

 Service, 1917 and 1918. 



