A study was carried out in a rural area of Asir region in Southwest of Saudi Arabia where information on the types of domestic water supply and sociodemography in relation to intestinal protozoal infections were obtained from 1417 inhabitants (81.4% of the total) of nine villages. Stool samples were collected from the study population and examined for intestinal parasites. Overall, the prevalence rates of infection with the common water-borne parasites, Giardia lamblia and Entamoeba histolytica were 18.9% and 9.2% respectively, which were high compared to other endemic areas of the Kingdom. The sociodemographic factors including age, sex, degree of education, intrafamilial clustering and crowding index were found to be non significant determinants of both protozoal infections. The source of domestic water was the sole factor significantly associated with the high prevalence rates of infection in the community. This relationship was confirmed by multiple logistic regression analysis. A significantly high risk of contracting the infection with both parasites was observed among individuals who drank jar water (OR = 2.973, 95%CI:1.515-4.402 and OR = 2.831, 95%CI:1.414-3.915, for G. lamblia and E. histolytica respectively) or well water (OR = 2.153, 95%CI:1.211-3.913 and OR = 2.117, 95%CI:1.341-3.715, for G. lamblia and E. histolytica respectively). Those who used desalinated water for drinking seems to have the lowest degree of exposure to the risk of infection (OR = 0.689, 95%CI:0.501-0.849 and OR = 0.793, 95% CI:0.518-0.912, for G. lamblia and E. histolytica respectively). The results indicate that the use of improved water supply, including protection of community wells and domestic storage tanks, together with mandatory inspection measures during transportation and distribution of commercial water should reduce the rate of infection with the two protozoal parasites in this rural community.

aren't differences between the comorbidity examined. The days of stay in-hospital of patients of group A was of days 7.00 (IQR 5.00-10.25) and it was statistically inferior with respect to the stay in-hospital of patients' group B that was of 9.00 days (IQR 7.00-13.0) (p<0.0001). In the group A the GFR correlate to days of stay in-hospital (-,248; p¼,000). This don't occur in the group B (-,06; p¼,469). (TAB1) Bringing back to normal for GFR between 11 and 30 (GFR Group A 16.74ml/min IQR 14. p¼,701) into the two group there are the different during the hospitalization days (group A 7.00 IQR 5.50-10.00; group B 9.50 IQR 7.00-12.75; p<0.007). (TAB.2) In a subanalysis that analyzes in hypertensive patients and in non-hypertensive patients the role of serum potassium, our study shows a different in the days of hospitalization between the group B and the group A. (TAB 3; TAB 4). The risk of a re-hospitalization is of 1,131 in 9 month; 1,223 in 12 month; 1,237 in 18 month. Conclusions: The frequency of hyperkalemia in the patients that stay in-hospital don't seem associated to utilization of RAAS-blocker. Our study shows that the value of K, outmoded the cut-off of5,1 mmol/L, bring about a augmentation of the duration of the period of hospitalization and the risk of a re-hospitalization, also in low Hyperkalemia. Others analysis are needed to understand if it is awkward to more serious clinical conditions or to a not suitable therapeutic approach of hyperkalemia even if light.

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