A study on 214 stone-miners that have been working in the stone-mine in the dry season during 1998-1999 in B×nh §Þnh has shown that 50 persons experienced respiratory functional disorder; 164 persons had a normal respiratory function. Most of respiratory functional disorders were limited respiratory functional disorder. There was difference of respiratory functional disorder between groups of working ages.
Respiratory Function Tests

Use of antibiotic in animal breeding aims to prevention of infection. Especially, the antibiotics is considered as growth stimulation. Although antibiotic mixed with low content, the long- term use of antibiotics leads to more antibiotics resistant microbials than full dosage of it in the short-term. The antibiotic resistant microbials will be pathological factors for human and they transmitted along with foods processing affecting seriously the human health.
Anti-Bacterial Agents ; breeding

Multiple tests are available to diagnose Helicobacter pylori. The aim of this study was to evaluate and compare the sensitivity, specificity and negative and positive predictive values of 13C-Urea breath test (13C-UBT) and other biopsy-based methods in H. pylori diagnosis. A total of 702 patients (mean age, 51.2+/-16.0 years; 327 males and 375 females) were tested for H. pylori infection using 13C-UBT, CLO tests (Delta West, Australia), histology (H&E and modified Giemsa stains), and culture. All patients were untreated for H. pylori infection. Infection status was established by Gold Standard (or culture positive of 2 out of 3 other tests positive). Results suggested that 13C-UBT was the most accurate method for H. pylori diagnosis, although CLO test and histology also produced excellent sensitivity and specificity. Culture method had the best specificity; however, it produced the lowest sensitivity. Combination of histology and CO test gave higher sensitivity and specificity than each method used individually. Conclusion: The noninvasive 13C-BUT is excellent accurate method for determining H. pylori infection when endoscopy is not required. Histology, CLO test and culture are also good methods for H. pylori diagnosis.
Helicobacter pylori ; diagnosis

Using the reagents produced in Friendship Hospital, urease-test was carried out with the sensitivity of 92.9%, specificity of 95.5%, and validity of positive prognosis 96.0%, of negative prognosis of 94%. The test gives promptly reliable results
Urease ; Helicobacter pylori ; Indicators and Reagents ; diagnosis

Study on 732 Australia dyspeptic patients with infection of H. pylori, in which there are 96 Vietnamese immigrants. Results: Among dyspeptic patients, the prevalence of H. pylori infection in Vietnam (63.7%, 95%Cl: 62.7-64.7%) was statistically higher than that in Australia (46.4%, 95%Cl: 46.0-46.8%). The spectrum of GD diseases in Vietnamese dyspeptic patients is very different from that of Australian patients with higher DU and GU and lower GORD and Barrett's epithelium. The prevalence of H. pylori infection in Vietnamese patients in Hanoi is not different from that of Vietnamese immigrants in Australia. In contrast, GoRD is found about 7 times more frequent in Vietnamese immigrants compared with Vietnamese patients living in Hanoi.
Stomach Diseases ; Helicobacter pylori ; Infection

A cross sectional study on the stone dust in the working environment in mines of AC, 504 in Binh Dinh province in dry seasons during 1998 and 1999, has shown that the dust contamination level was high. All indicators were above allowed standards. 9/14 of samples had an airway dust level higher 1-9 time than this of allowed standards. 100% of samples had the total dust level higher 4-37 times than this of allowed standards. The silicon levels in the stone mine of Phu Ly (4-5%) and Hoa An (22-23%). This is cause of silicosis among workers of these facilities.
Dust ; Therapies, Investigational

4(3H)-quinazolinone derivatives were synthesized by the condensation of N-acetylanthranilic acid with aromatic amines or heteroaromatic amines, respectively. The obtained compounds were characterized by their melting point, elemental analysis and the mass, ultraviolet, infrared, 1H and 13C NMR spectra. The obtained derivatives of 4(3H)-quinazolinone were also biologically screened such as: hypnotic, analgesic, antibacterial and cytotoxic activity. 3-(2-hydroxy-3-pyridinyl)-2-methyl-4(3H)-quinazolinon (6) showed potential analgesic activity. No compounds showed hypnotic, cytotoxic and antibacterial activity.
Chemical synthesis ; Physiological Effects of Drugs ; N-acetylanthranilic acid

By the technique of indirect immunofluoresceine using 18 diverse markers, in the hospital K- Ha Noi, study was performed to determine the capacity of foreign antigene expression of tumor cells in the cell surface making them identified by immunology system through HLA system on NPC < 75 years old age patients. This system played an essential role in the regulation and realization of immune response.
Carcinoma ; Nasopharyngeal Neoplasms ; Nasopharyngeal Diseases ; Diagnosis

In this study, 48 long-term exposed people with polychemicals (the male/female ratio is 1/3, the age from 23 to 44): such as organic and iso-organic acids: benzene, toluene and their coequals were investigated. 17 normal people not exposed with polychemicals as the control group. Results were shown following: quantity of erythrocyte was lower than control group but not significantly. Leucocytes especially neutrophils reduced significantly (p<0.001). 15/48 cases (30%) appereared lymphoblast. There is no difference in platelet between studied group and control group
Chemistry ; Diagnosis ; Erythrocytes ; Blood Platelets

Study on 48 people, of whom 16 are male and 32 are female, from 23 to 44 years old. They were long exposed with poly-chemicals, such as organic and iso-organic acids: benzene, toluene and their coequals. The parameters have been used: phagocyte capablity and phagocyte index of neutrophils; E, rossett formed T cells. The results showed that: Phagocyte capability and phagocyte index of neutrophils decreased significantly comparing with control group (p<0.001)
Chemistry ; Allergy and Immunology ; Epidemiology