SUMMARY 161 



the last mosquito that has chanced to enter — it takes only one 

 bite from an infected mosquito to cause a case of malaria. 



10. Communities that have carried on systematic mosquito 

 campaigns have succeeded in reducing malaria to a very marked 

 degree in one season, — ■ 50 per cent has been accomplished in the 

 first season. 



11. A successful campaign can be conducted at the rate of 

 seventy-five cents a day per square mile of protection, — each 

 Inspector being responsible for ten square miles. 



12. The crusade must be under the direct supervision of an 

 expert Field Agent who has had proper training in malaria con- 

 trol and is familiar with rural health problems. 



13. When a new campaign is undertaken, it is desirable that 

 some work be done in October and November in order to elimi- 

 nate the last brood of mosquitoes, which is the overwintering 

 brood. The spring work should begin early in March, usually 

 March 1st. 



14. There is great need of a legislative act making it possible 

 to provide funds to carry on anti-malaria work, since everybody 

 in a given area is benefited, and a few should not be compelled 

 to carry the financial burden. This can be accomplished by the 

 organization of sanitary (mosquito) districts, in which the cost 

 is covered by taxation, or secondly by a direct appropriation for 

 such purposes. The increased influx of desirable colonists 

 would more than offset the expense. 



15. Malaria is the principal cause for absences in the rural 

 public schools in the greater part of the malaria infested districts; 

 otherwise climatic conditions favor good health. Absences due 

 to malaria in a rural school were reduced by 45 per cent in one 

 season, through a systematic anti-mosquito crusade. 



16. Statistics show plainly that about three fourths of the 

 malaria in the state of California is found in nine out of the twenty- 

 four malarial counties. These nine counties are otherwise just as 

 healthful as any of the others, malaria being virtually the only 

 blight; — hence we find here the situation where systematic and 

 energetic effort must be expended. 



