Abstract: A cco rding to the case repo rt ing system , the number of malaria cases in Ch ina numbered
34 645 (Taiw an P rovince and Hong Kong not included ) in 1997, with a mean incidence of
2. 91 per a hundred thousand and lethal cases of 46. How ever, the estimated number of actualmalaria cases based on investigations at provincial level was 220 000- 250 000, showing a sligh t diminu t ion as compared with that in 1996.
Yunnan and Hainan were continued to be the major provinces endemic fo r malaria,where the number of malaria cases amounted to 46% of the total in the whole country. In
Yunnan Province, an increase of outbreak spots and resurgence of malaria incidence in border
region were reported, while the incidence was stable or slight ly declined in most o ther
provinces, but was fluctuated in provinces distributed with A nopheles anthropophagus
Blood examination on febrile patients for 9 209 102 man/time in 1 294 counties of 18
provinces/municipalit es/autonomous regions (P/M /A )with a population of 569 703 000 detected 26 816 cases positive for malaria parasite, showing a mean positive rate of 0. 29%; of which the number of falciparum malaria casesw ere 4 114 ( including mixed infections with vivax malaria, the same below ) , account ing for 15. 3% of the total parasite positives ; of the
three quartan malaria cases detected, one was infected via blood transfusion. Totally 568 783 target-population and migratory people were surveyed, 2 861 were positive fo r malaria parasite, with a mean parasite rate of 0. 50%; and 586 falciparum malaria cases were among the posit ives. A s a whole, the endemicity of falciparum malaria was still confined to 44 counties
of Hainan and Yunnan Provinces . Imported falciparum cases were reported in 74 counties located in 17 P/M /A , how ever, no introduced falciparum malaria cases were recorded.