INVESTIGATION ON DISTRIBUTION, ECOLOGICAL FEATURE AND MALARIA TRANSMISSION EFFECT OF ANOPHELES IN GUANGDONG PROVINCE

Objective To investigate the distribution, ecological feature and malaria transmission effect of Anopheles in Guangdong Province. Methods The investigation methods of mosquito vector and ecological feature were conducted in malaria epidemic regions in Guangdong Province. Results Anopheles anthropophagus was found in 12 Cities and Counties in Guangdong. It fed mainly on human and on cattle sometimes. The peak season of An. anthropophagus in nature was from September to October each year, which was in accordance with the malaria peak incidence. An. sinensis, An. minimus and An. cndoidiensis were found in most Cities and Counties in Guangdong respectively. They mainly fed on cattle and on human sometimes. The positive sporozoite with four species of Anopheles had been found widely. The positive sporozoite rate were by 0.35%-0.54% for An. anthropophagus , by 0.15%-0.93% for An. sinensis , 0.23%-5.94% for An. minimus and 0.05% for An. candidiensis respectively. Conclusion An. anthropophagus, An. sinensis, An. minimus and An. candidiensis were the malaria transmission vectors in Guangdong Province, but An. anthropophagus and An. minimus were the chief malarial vector in malaria epidemic regions, An. sinensis and An. candidiensis were the secondary vectors in malaria epidemic regions.