52 



MOSQ 1'ITO ERA DICA TION 



the last case in Colon occurred in 1906. Thereafter, yellow fever 

 was unknown in the Canal Zone. 



Progress r in malaria control was slower but no less sure. The 

 following table 1 will show in an abbreviated form the very- 

 material reduction in the malaria morbidity and mortality rate 

 among Canal employes during the latter period of American 

 construction. The rates are subject to the qualification that they 

 are based on the number of names on the payroll and not on the 

 true average number of persons employed: 



ANTI-MOSQUITO WORK ELSEWHERE 



The work at Havana and Panama gave a great impetus to 

 anti-mosquito campaigns in other parts of the world, and slowly, 

 but surely, one after the other of the great endemic centers of 

 yellow fever were cleaned up. Several of the large cities of 

 Brazil, for centuries known and recognized as foci of the dreaded 

 "yellow jack," were successfully attacked. In 1905, Belize, 

 British Honduras, was cleaned up, while in 1906-07 a successful 

 campaign was conducted in the British West Indies. 



In 1905, an epidemic of yellow fever broke out in New Orleans. 

 Anti-mosquito measures were at once employed and the disease 

 was soon stamped out, with a total of 3,389 cases and 443 deaths. 

 This compares very favorably with the figures of the great epi- 



1 "A Plea and A Plan for the Eradication of Malaria Throughout the 

 Western Hemisphere," Prudential Insurance Company of America, 1917. 



