Volume s1-19, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



  • 1.  In a malaria survey of Costa Rica 9,126 children in 168 different localities were palpated for splenomegaly, and 3,981 blood films were examined for malaria parasites.
  • 2.  The places with a high degree of endemic malaria were generally situated at elevations of less than 1,000 feet.
  • 3.  and were found throughout the malarious regions of this Republic, whereas was distinctly more common on the Pacific Littoral.
  • 4.  Fifteen species of were obtained in the 175 localities studied for their anopheline fauna.
  • 5.  was present in abundance in practically all of the endemic malarious regions, whereas attained its maximum prevalence where malaria did not occur.
  • 6.  The only anopheline to be found naturally infected with malaria parasites was .
  • 7.  was the species most commonly taken inside houses and traps, whereas and , though frequently found as larvae, were only rarely captured as adults.
  • 8.  We have no evidence as yet that any anopheline except acts as a natural vector of malaria in Costa Rica.


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  • Received : 17 Jul 1939
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