This study was performed at Hanoi University of Natural Sciences and National Institute of Malaria and Parasitology from April 2001 to May 2002. Biological trials on laboratory strains of An. dirus were carried out according to WHO/VCB/81.806; WHO/CDS/CPC/MAL/98.12 and WHO/VCB/89.981. Analyses were conducted by the method of fluid-fluid extraction with the solvent system of n-hexan. Fendona 10SC,Icon 2,5CS,K-othrin ISC, Imperator 50EC .soaked mosquito bednet had manifested insecticide effect. Their effect of killing An.dirus was maintained for 5 -6 months. The procedure of analysis of pyrethroide compounds in use for soaking mosquito bednet was established and the half live of 125-188 day long period for each compound was determined
Pyrethrins ; metabolism ; world health organization ;

A cross-sectional study was conducted in HCM City in April-May 2004 on 600 men who have sex with men (MSMs) in order to identify the risk factors of HIV transmission for elaborating a specific interventions . Results showed that a big group of MSM was constituted with a private service system. In this group, various high risk sex behaviors were practised : in average, sex buyer- 28,9%, sellers-36,5%, anal sex with male partners-2,7% in the last recent months, no more 60% of men using condom in sex relation; in the last 6 months a rather low rate in this group-16,6% using condom in sex relation with normal women, with a very low rate-26,3% often using condom. In this group, there were 1,7% using intravenous drug in the last 12 months
Homosexuality ; Behavior ; Demography ; Men

Study 600 men who have sex with men (MSM) over 15 years old in Ho Chi Minh City. Results: MSM group had complex sexual relations by oral sex and anal sex, with female partners and sex workers, and often used drugs. It’s necessary to have some intervention approaches in order to decrease HIV infection in this group.
Risk Factors ; HIV ; Male

At Cho Ray Hospital – Ho Chi Minh city from Dec 2001 to Dec 2002, 228 heart failure cases (96 males, 130 females, aged 58.4317.45) were studied. Their associated conditions were: 14 with diabetes, 5 brain blood infactus, 5 hyperthyroidies, 19 kidney failures. Among 162 patients with electrolyte disorders, 25 were died, the rate of hyponatremia and hyperkalemia was significantly higher in fatal group than in survival group. Hyponatremia was fatal risk factor and it should pay great attention to treat this condition with hypertonic natrium solution
Heart Failure, Congestive ; Cardiovascular Diseases ; Patients ; Electrolytes

Using white Swiss mouse at 3-4 weeks of age for injection of Japanese Encephalitis (JE) virus. Every 8 lots of the mouse had been infected with Nakayama and Beijing-1 strains by injection of 0.03ml into their brains, then followed up within 3 days. The paralysed mice were collected at the 69th hour of the beginning and at the 120th hour of the end. The interval between collection time was every 3 hours. In this study, the rate of mice with paralysis due to Beijing-1 strain was higher than those due to Nakayama strain (94.99% and 92.97%, respectively). The authors suggested that use of Beijing-1 strain to produce JE vaccine is more effective than Nakayama strain.
Japanese Encephalitis Vaccines ; Mice

A study was carried out 50 patients with stomach cancer received total gastrectomy after 6-12 months of operation, recovered the digestive functions by 2 methods. The evaluation of the esophagoduodenal reflux by scintigraphy. Used 99m Tc-HIDA and gamma-camera found that as a simple, physiological acceptable method and could be used for quantitative analysis. The method of the esophago-intestinal anastomosis type omega after the total gastrectomy can remainly cause the reflux. The method of making the pseudo stomach type lygidakis with distance of 40 cm from the anastomosis stoma Roux -en-Y to the anastomosis stoma of the esophagointestine found that it can prevent the esophagoduodenal reflux. The reflux found that did not occure in all 31 patients who evaluted by scintigraphy.
Gastroesophageal Reflux ; Gastrectomy ; surgery ; therapeutic

250 patients with ages of 30-50 received the mammography in the Institute of Mother and Infant Protection and Care during 4/1998 - 4/1999. The results showed that patients came to examine because of the mechanical symptoms and X-ray (37.2%) in which 72% found having the physical lesion. The physical symptoms accounted for 62.8% of which 92% found having lesion on the X-ray. The lesion of the right breast, left breast and both breast were 44%, 56% and 40%, respectively. The lesion included fibrosis, tumor and complex lesion.
mammography ; Expert Testimony ; patients

53,010 tests of RIA implemented during 1/1992- 10/1996 including 45,210 tests of HBsAg, 4,764 anti-HBs, 1,119 HBeAg, 1325 anti-HBe and 1,358 anti HBc to evaluate the frequent of HBsAg, double infection of HBV and HCV in the chronic hepatitis and the changes of markers of hepatitis B in persons carrying the chronic HBsAg. The results have shown that the frequent of the hepatitis B viral infection was very high and the double infection of HBV and HCV was common in patients with the chronic hepatitis
Hepatitis B ; Immunologic Techniques

The results of project "RAS/6/018" have shown that the rate of HBsAg carriers among normal people was 10.6-15.1%. The rate of HBsAg among blood donors was 1.3%, lower 10 times than this of general population. Frequency of HBV infection, HBV and HIV infection was high among patients with chronic hepatitis. There were markers of HBsAg and HBeAg of transmission from mother to her children among chronic viral hepatitis B carriers due to the uncompleted immunological structure and function.
Hepatitis B ; Monitoring, Immunologic

Evaluating the role of the health staffs and collaborators of the population and family planning program in the local level in the approach to women. Capacity of expansion of services and efficacy of these activities was carried out in urban commune of Tr¶ng Dµi, §ång Nai province and rural commune of Phôc LÔ, H¶i Phßng city. The results have shown that the collaborators of the population and family planning have successfully approached to women who were married, at reproductive ages. The collaborators self realized that it should strengthen their task and quality of services and knowledge, skill and practice
Reproductive Health Services ; Population