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This paper reports the results of longitudinal surveillance of filariasis for 4 years in Jining City, Shandong, where the disease has been controlled. It showed that the microfilaremia rate dropped from 0.48% to 0.03% and no new case was found and the natural infective rate of the main vector mosquito Culex pipiens fell from 0.45% to 0.03% and no larva III was detected. The purifying measures should put emphasis on the management of migrating persons repeatedly examining and treating old microfilaremia cases, the border areas with high microfilaremia rate, as well as working out a plan to cure the advanced patients and mosquito control measures with special reference to construction of new village settlements.

123I- and 131I-labeled hexadecenoic acid (IHDA, radiochemical purity over 92%, dissolved in 6% bovine serum albumin solution) was investigated in vivo. ICR mice were administered IHDA via the tail vein. Maximum myocardial uptake (27.3 +/- 5.1%) was reached about 0.5 min after the injection. The ratio of uptake in the heart to that in the lungs was 2.3, to that in liver 1.5 and to that in other organs 2.4 to 6.4. The dog myocardium was visualized distinctly within 3-5 min with a gamma camera after i.v. 131I-IHDA, and not interfered with by activities in the lungs, liver and other organs. The low blood levels at 20 min had little effect on the quality of the heart images.

The effects of intramuscular injection of Artemether on peripheral T, B, T mu and T gamma lymphocytes in beagle dogs was investigated cytochemically. Doses used were 6, 19, and 32 MKD, respectively. Results showed that after injection of Artemether for 15 successive days, the T, B, and T mu lymphocytes of the 19 and 32 MKD groups were markedly reduced and the T gamma lymphocytes of all 3 dosage groups were decreased to zero. 28 days after cessation of the drug, T, T mu and T gamma lymphocytes had recovered to control levels, while the B lymphocytes of the 19 and 32 MKD groups remained markedly lower than those of the control groups. The differences and similarities of the effects on the peripheral T, B, T mu and T gamma lymphocytes produced by the 3 dosages of Artemether and the relationship between the changes of T, B lymphocytes and immunological function of beagle dogs are discussed.