| chloroquine-resistant plasmodium falciparum malaria at nchelenge, northeastern zambia. follow-up on 515 hospital patients. | from 1986 until 1988 chloroquine sensitivity of plasmodium falciparum malaria was monitored in 515 hospital patients in nchelenge district, northeastern zambia. after treatment with chloroquine 30 mg base/kg, bloodslides were examined on day 2, 4, 6 and 7. the overall resistance rate was 21.4%, of which 29% was r1-, 30% r2-, 18% r3- and 23% r2-3 resistance. resistance rates were negatively correlated with age and positively with the initial parasitemia. it is suggested that in vivo tests of chlo ... | 1990 | 2100073 |