This article presents a literature review on the chemical composition, antimicrobial activities of cedar oils, and the main diseases this tree is subjected to. The studies included in this review have drawn upon several databases including Scopus, Springer, ScienceDirect, Web of sciences. The keywords used in data collection were C. atlantica M, C. libani L, C. deodara L, C. brevifolia H, Red ring rot (M'jej), Cubic brown rot (Saboune). Genus Cedrus is rich in bioactive molecules such as himachalenes, atlantones and generally terpenes. These molecules have an important medicinal and cosmetic properties maintained by the inhibition and destruction of many bacteria and fungi, along with other several biological activities. Cedar suffers from pests and fungal attacks, which cause two types of fungal decay: the first one is brown cubic rot caused by Fomitopsis pinicola or Ungulina officinalis, and the red ring rot caused by Trametes pini or Phellinus chrysoloma.

As part of the valorization of Aromatic and Medicinal Plants (AMP) in Morocco, we studied the chemical composition and the antibacterial and antifungal activities of Teucrium polium Essential Oil harvested in a region of Pre-Rif, Taza in Morocco (BniKrama). After extraction of the essential oil (EO) by hydro-distillation process, the study of the chemical composition of this EO was carried out by gas chromatography (GPC) and GC/MS (gas chromatography- mass spectrometry), and the evaluation of antibacterial and antifungal activity was carried out against eleven microbial strains by determining the minimum concentration inhibitor. The yield after extraction by hydro-distillation is 0.71%. After (CPG) of the essence of this plant, sixty-eight components have been identified, of which α-Pinene is the major component (21.96%). It is followed by Limonene (18.77%), and β-Pinene (8.46%). The essential oil of T. polium (EOTP) has shown strong antibacterial and antifungal activity. This bioactivity is mainly due to the richness of this essence in terpenes known by their effectiveness against microbial agents. This essential oil is very rich in chemical molecules. Antimicrobial tests show that this EOTP has a broad spectrum on molds, fungi and bacteria.

The valorization of aromatic and medicinal plants is a vital research axis in the field of valorization and optimization of natural resources. Cedar is one of the most sought-after plants in the world due to the quality of its wood and its richness in bioactive molecules that can be used in the pharmaceutical, cosmetic, and perfumery industries. Using keywords such as: Cedrusatlantica Manetti, Cedrusbrevifolia Henry, Cedrus deodara London,Cedruslibani London and Cedrusbrevifolia Henry, articles were collected from international scientific databases. The analysis of the abstracts of these articles by computer tools such as Zotero, Excel, and Nvivo allowed us to conclude that the chemical composition of cedar varies from one species to another and from one part of the plant to another and according to the harvesting environment. However, it is generally characterized by the dominance of terpenes. The latter is known to have antimicrobial properties, which explains the effectiveness of the oils and extracts of this plant against fungi and bacteria such as helicobacter pylori, Gram-positive and Gram-negative bacteria, and important anticancer power.

Medical and pharmaceutical waste (MPW) pose a big problem in society and at the healthcare centers because they cause a bacteriological risk in the living being and the environment. Morocco, since 1991, has developed a legal arsenal on medical and pharmaceutical waste. In order to identify pathogens at the level of hospital waste, and to assess their treatment system, this study was carried out at a Moroccan hospital center. The analysis of the samples was performed at the medical biology laboratory of the same hospital. Eleven samples were done at four care units, including two at the internal storage room before treating waste with an ECODAX T300 type mill, and two after treatment from the ground material and leachate. Before crushing 63.6% (7/11) of the samples gave positive cultures. The presence of pathogenic microorganisms such as (Escherichia coli, Klebsiella pneumoniae, Staphylococcus aureus, Pseudomonas stuzerie and Pseudomonas fluorescens) have been identified and their sensitivity to antibiotics has also been determined. After the grinding cycle, the microbiological characterization of the samples on ground material and leachate revealed 100% of bacterial presence, the microorganisms (Escherichia coli and Klebsiella pneumoniae) were identified. The results show that hospital waste encloses multi-resistant pathogenic bacteria before and after their treatment, which raises a big question mark on the quality and effectiveness of the treatment of MPW.