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Case detection rates for Central Burma (1962-1972).

A short description of the leprosy control program in Burmpa is given and the decrease of the case detection rates during thhe period 1962-1972 are presented to show the effects of control measures in the program emphasizing the importance of early case detection through annual examination of household contacts and school children, regular treatment and health education.

Age Factors↗

Chloroquine-resistant malaria in Burma.

Two field trials to detect chloroquine-resistant malaria were conducted according to WHO recommendations in a malaria free area near Rangoon. Peripheral blood smears were examined for asexual forms of P. falciparum on day one through to day seven, on day 14, 21, and 28 after a standard dose of 1500 mg. of chloroquine base. Haskins test to detect chloroquine in urine was done on all cases and plasma chloroquine levels were measured in some. Out of 105 patients tested RI resistance was detected in 66, RII in 19 and RIII in three. Subsequent trials with other anti-malarial drugs indicated that the chloroquine-resistant P. falciparum were also resistant to one day therapy with pyrimethamine 50 mg. or sulphamethoxypyridazine 1 G given singly; and resistant to one day therapy with combinations of pyrimethamine 50 mg. plus sulphamethoxy pyridazine 1 G, pyrimethamine 13 mg. plus dapsone 100 mg., and trimethoprim 320 mg. plus sulphamethoxazole 1600 mg. All those tested were sensitive to quinine sulphate, 0-6 G given three times a day for 10 days, and were also sensitive to one day therapy with combinations of trimethoprim 500 mg. plus sulphalene 1 G, and pyrimethamine 50 mg. plus sulphamethoxine 1 G. Pyrimethamine 12-5 mg. plus dapsone 100 mg. in weekly doses was shown to be an effective chemoprophylaxis. Quinine was tested on 38 subjects while other drug schedule were tested on six to eight subjects.

Chloroquine↗

Dengue haemorrhagic fever in Burma.

Although sporadic from 1965 to 1969, a major outbreak of dengue haemorrhagic fever (DHF) occurred for the first time in Rangoon in 1970. Since then the disease has occurred every year in Rangoon and is now observed to be expanding to other urban areas in the country. The clinical diagnosis of DHF was confused by concurrent outbreaks of influenza A in 1971 and influenza A and B in 1972. A laboratory study of 3,447 clinically diagnosed haemorrhagic fever cases showed that 1643 cases (47.8%) were due to dengue and chikungunya, 296 (8.6%) to influenza A, 85(2.5%) to influenza B, 12(0.3%) to measles and 1411(40.8%) were of unknown aetiology during the 5 year period 1970-1974. Ae. aegypti mosquitoes are widely distributed in the country up to and including 900 meters above sea level but breeding is not found above that altitude. The absolute larval population which is highest in July as well as landing rate correlated with the peak incidence of DHF cases.

Aedes↗