Nosocomial infections are a real concern in health systems around the world, and in the individual care of patients in hospitals. It is necessary to note that these infections are contracted in hospital after 48 hours of hospitalization and 30 days in the postoperative period. A study on the prevalence of nosocomial infections conducted under the aegis of the world Health Organization (WHO) revealed that on average 8.7% of hospitalized patients had acquired a nosocomial infection, which is also the case in our country. The causes of these nosocomial infections are multiple, related to both care procedures and behavioural practices. In 2011, the prevalence of nosocomial infections in Morocco was estimated at 5.5%, 38.8% of which are surgical site infections. The purpose of this work is to determine the prevalence of surgical site infections in surgical care units in a hospital center in Morocco. The study was conducted at the IBN BAJA Provincial Hospital Centre in TAZA in April 2018 and 2019, the sample size was 52 patients hospitalized on the day of the survey in 2018 and 41 in 2019, the data collection was done by a standardized questionnaire and the prevalence survey was conducted in a single round for each one of the surgical care units. The results revealed a prevalence rate of 13.48% (7/52) in 2018 and 12.19% (5/41) in 2019 among operated patients, with a variation according to care units. Hence, it was higher in the gynecology service 43% (3/7) in 2018 and in female surgery in 2019 with a percentage of 60% (3/5); but it was absent in the child surgery unit in both years.

The knowledge of the physicochemical characteristics of Inaouene surface water constitutes a means of investigation for the assessment of the risks of pollution and the contamination status of these surface waters. The study initially focused on the physicochemical bacteriological study and the content of some heavy metals in the River waters. The first results revealed relatively high levels in nutrients, DCO, BOD5, calcium and magnesium. The content Cu, Cr and Pb is superior than relative standards, which would be due to the craft activities of the city of Taza as well as to the domestic liquid discharges on this city. The bacteriological investigation revealed a large concentration of these waters in coliforms and faecal streptococci. This allowed concluding that the quality of the Inaouene surface waters is much degraded.

Acacias are spectacular angiosperms grouping single canopy species to those of tropical forests. Easy growth, hardiness and drought resistance of these Australian Wattle trees give them variable and great economic importance. Indeed, among other they produce, wood, edible seeds, gums and provide a valuable source of high quality fodder, rich in protein for subsistence and commercial production of livestock because they provide foliage during dry periods in the absence of herbaceous species. In addition, they contribute to the warmer climate of arid and semi-arid areas by reducing evaporation and creating a shadow that slows the soil drying and provide the setting and coastal sand dunes with their lateral root system that promotes better maintenance of the sand particles cohesion. Moreover, their ability to develop a dual symbiosis with Rhizobium bacteria and mycorrhizal fungi confers ecological importance. Indeed, they provide soil enrichment and improvement of soil fertility due to their ability to fix atmospheric nitrogen and to explore deep horizons of the soil by their roots. All these factors make it an economic resource of a great environmental and social importance, especially in arid and semi-arid areas, and an excellent candidate for reforestation of Mediterranean areas.