A comparative study of oxidant–antioxidant status in stable and active vitiligo patients

The pathogenetic mechanisms in vitiligo have not been completely clarified. One of the major hypotheses in the pathogenesis of vitiligo is the oxidative stress hypothesis. The active or stable phase of vitiligo is defined on the basis of the progression or appearance of new lesions in the last 3 months and the absence of new lesions or their progression in the last 6 months, respectively. Eighteen patients with active vitiligo, 18 patients with stable vitiligo, and 40 controls were included in this study. We examined serum levels of malondialdehyde, selenium, vitamin E and A, and the erythrocyte activities of glutathione peroxidase, superoxide dismutase, and catalase. Our results revealed a significantly higher level of serum malondialdehyde, selenium in patients with active disease compared with the controls. Significant higher increase in erythrocytes superoxide dismutase activities was observed in active vitiligo group, erythrocyte glutathione peroxidase activity was decreased significantly in active disease, whereas erythrocyte catalase activity and plasma vitamin E and A levels were not different in vitiligo patients as compared with controls. Our study shows that oxidative stress is involved in the pathophysiology of both active and stable vitiligo but increased imbalance of antioxidants was observed in the blood of active vitiligo patients.I dedicate this article to our dear director (Mme Hentati Basma) who dead in 06/06/06. We will never forget you and you are always in our heart.     

Clinical aspects and etiology of lower respiratory tract infections in hospitalized children]

The authors report a prospective study conducted in one of the general pediatrics unit. One hundred one children, aged 20 days to 12 years, admitted with acute lower respiratory tract infections have been studied on clinical paraclinicals and etiology grounds. All children had a chest Ray roentgenogram, a total blood cell count and C-reactive protein. The detection of a viral agent in nasopharyngeal aspirate by immunofluorescent technic were performed. 85% of patients have bronchiolitis, the chest--Rays showed an abnormal pictures in 84.2% of cases, an anaemia was present in 54.7%. Viral agent as identified in 58 patients, the RSV indicated in 56 cases. Bacterial infection as present in 57 of the 101 children. A mixed viral-bacterial infection as documented in 28 cases. Among bacterial causes the predominant agent as Haemophilus influenzae 24, Branhamella Catarrhalis 17, streptococcus pneumoniae in 16 cases. Early empiric antibiotic as performed. All patients recovered uneventfully.     

Mortality due to smoking in Tunisia in 1997]

In Tunisia, in spite of the high prevalence of the cigarette smoking among males, there consequences in term of mortality were not until evaluated. These last can be estimated from tobacco consumption data, mortality statistics and estimates of risks observed among populations of smokers in cohort studies. Numbers of deaths by causes have been estimated from WHO for 1998 year. Smoking prevalence have been estimated from a national survey conducted in 1996 by l'Institut National de Santé Publique and the National League against the Tuberculosis and the Respiratory Illness. Mortality attributable to tobacco in Tunisia has been estimated 6430 deaths. The effect of smoking are a lot more important at the man (5580 deaths), contributing to 22% of male deaths, that at the woman (850 deaths) contributing at 4% of the female deaths. The present mortality to tobacco is similar to certain developed countries as France or Canada. The consumption of cigarettes even though it recorded a light decrease during these last years, remain even elevated notably at the young. Then it is waited to see an increase of tobacco related deaths during the future decades. It is urgent to conduct an efficient politics against this tobacco epidemic by helping the smoker to stop smoking and preventing teenagers to begin to smoke.