Reappearance of Anopheles darlingi root and vivax malaria in a controlled area of Guyana, South America.
A small outbreak of malaria was reported at Linden, the major mining town of bauxite and alumina, and situated 105 km up the Demerara River. Mass blood and fever case surveys were undertaken, coupled with subsequent passive case detection at the complex's hospital. Twelve vivax malaria cases were found; seven of these seem to have been infected indigenously. Corresponding surveys on the anopheline vectors showed for the first time since 1948 the presence of An. darlingi Root, 1926 in the outbreak areas of the upper Demerara River. Further, another known vector in Guyana, An. aquasalis Curry, 1932 was also found biting. The presence of An. intermedius Peryassu, 1908 was confirmed and An. bellator Dyar & Knab, 1906 was reported from Guyana for the first time. An. braziliensis Chagas, 1907 was also sampled. The presence of known vectors of malaria in Guyana i.e. An. darlingi and An. aquasalis and vivax malaria parasites up the Demerara River emphasize the possible reinvasion of the densely populated coastland with malaria.
D000293:Adolescent; D000328:Adult; D000818:Animals; D000852:Anopheles; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology / Q000517:prevention & control; D005260:Female; D006172:Guyana; D006801:Humans; D007223:Infant; D007303:Insect Vectors; D008288:Malaria / Q000453:epidemiology / Q000517:prevention & control / Q000635:transmission*; D008297:Male; D010966:Plasmodium vivax