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Otostegia integrifolia Benth (O. integrifolia) is the endogenous medicinal plant of Ethiopia mostly used for the treatment of Stomach ache, tonsillitis, hypertension, malaria, ascariasis, and lung diseases. The current study was focused on phytochemical analysis and evaluation of the antibacterial activity of O. integrifolia Benth leave extracts against selected human bacterial pathogen by the agar well diffusion and microtube broth dilution method. Plant leaves were extracted with less polar to high polar solvents such as petroleum ether, chloroform, acetone, and ethanol. Phytochemical investigation was carried out for the identification of secondary metabolites responsible for antibacterial activity. In vitro antibacterial potential of O.integrifolia Benth leaf organic extracts against human pathogenic gram-negative (E. coli, K. pneumonia, V. cholera) and positive bacteria (B.subtilis, E. faecalis, S.aureus) were assessed by agar well diffusion, and bacterial inhibitory concentration of effective plant extracts was determined by 96 well plate broth dilution assay. Among all the tested organic leaf extracts, the acetone leaf extract of O.integrifolia Benth exhibited a promising broad spectrum of in vitro antibacterial activity against all tested multiple drug-resistant bacteria pathogens with significant MIC values of K.pneumoniae (2.144µg/ml), V. cholera (2.025µg), B.substilis (2.604 µg), and S.aureus (3.028 µg), respectively. The significant antibacterial activity of acetone leaf extracts of O. integrifolia Benth was due to the existence of flavonoids and phenolic compounds. The current studies demonstrated that the broad-spectrum antibacterial activity of acetone leaf extracts of O.integrifolia Benth might be helpful for the isolation of novel potent antibacterial agents against infectious bacterial pathogens without any side effects.

Calpurnia aurea is a medicinal plant belonging to the family of Fabaceae. Traditionally in Ethiopia the leaves have been used for the treatment of diarrhea, leishmaniasis, swelling, cough and snake bite. Based on the traditional use the leaves of C. aurea might be a promising source for development of anti-inflammatory agents. The objective of the current research was  to explore the 5- Lipooxygenase (5-LOX), Cyclooxygenase-1 & Cyclooxygenase-2 (COX-1 & COX-2) inhibitory activity of inflammatory enzymes of organic leaves crude  extract of C. aurea and its phytochemical analysis. The dried leaves powder of the C. aurea (100 g) was extracted with successive soxhlet extraction by solvents of low polarity (Petroleum ether) to a high polar solvent (Ethanol). These organic leaf extracts C. aurea were assessed for the in vitro anti-inflammatory activity by 5- Lipooxygenase, Cyclooxygenase-1 & Cyclooxygenase-2 inhibitory activities by ELISA method and further subjected to phytochemical screening. The ethanolic  leaves extract of C.aurea showed significant 5-LOX inhibitory activity of 51.07% at 100 µg/ml with IC50 of 95.30µg/ml and the C.aurea leaves acetone extract showed the  selective COX-2 index (2.35) inhibitory activity with an IC50 of 200.75μg/ml. The current work revealed that the C. aurea leaf acetone extract (CALAC) is  shows potential source for the isolation and development of 5-LOX and COX-2 dual inhibitory compounds for management of inflammatory related diseases and inflammatory cancers.

Acacia etbaica Schweinf belongs to the family Fabaceae widely distributed in Africa and various parts of this plant such as bark, leaves, flowers and roots are widely used as a folk medicine for curing of various ailments.This study was aimed to screen the phytoconstituents and evaluate the antibacterial activity of leaf extract of A. etbaica against selected multidrug resistant Enterobacteriaceae family. Leaves of A. etbaica were extracted with petroleum ether, chloroform, acetone, and ethanol by sequential soxhlet extraction. Phytochemical screening of organic leaf extract of A.etbaica was carried out for the detection of phytoconstituents accountable for antibacterial activity. In vitro antibacterial activities of A.etbaica leaf extracts against selected Enterobacteriaceae family gram‑positive bacteria such as (B.subtilis, E.faecalis,S.aureus)and gram-negative (E. coli, K. pneumonia, V. cholera) were evaluated by agar well diffusion. The antibacterial potential of acetone and ethanol leaf extracts of A.etbaica were determined by 96 well plate broth dilution assay. Among the tested organic leaf extracts, both acetone and ethanolic leaf extract of A.etbaica showed a potentially broad spectrum of in vitro antibacterial activity against tested multiple drug resistant Enterobacteriaceae family gram-positive pathogens such as B.subtilis, E. faecalis , and S.aureus and gram-negative bacterial strains E. coli, K. Pneumonia and V. Cholera with significant MIC values. The significant antibacterial activity of both acetone and ethanolic leaf extracts of A.etbaica was due to the subsistence of secondary metabolites phytoconstituents such as flavonoids and phenolic compounds.