Objective / Purpose: Bacteria causes one of the most common types of chronic mastitis. The most common causative organisms of mastitis include: Staphylococci, Streptococci and coliforms. The scope of this work was to research the antibacterial effects of Piper nigrum extracts against mastitis pathogens, and its antioxidant capacity. Materials and Methods: In our study, 2 Staphylococcus aureus and 5 Coagulase Negative Staphylococcus were used for experiments. Additionally, Piper nigrum were collected from Mugla herbalists in Turkey. The plant extracts were tested by disc diffusion assay for antibacterial activity. The antioxidant activities of plant extracts were also determined by ABTS [2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)] method. Results: The methanol extract of plant showed maximum inhibition zone against 2 bacteria. MIC values of extracts are 6500 μg/mL. The value found in ABTS method is highly effective (75.7%). Discussion/Conclusion: As a result, the in vitro studies indicate that the extracts of Piper nigrum have significant antibacterial and antioxidant activities. In addition to, the plant extracts could be used in treating mastitis caused by the test bacteria.

Objective: Microorganisms have an easier entry into the sportsman's epidermis, and these make diseases on athletes. The main scope of the study is to search the lack of information about the biological activities of Mentha piperita extracts against bacteria isolated from soccer player's shoes. Materials and Methods: The bacteria were isolated from soccer player's shoes from Balikesir Spor soccer team after the competition. The plant extracts were tested by disc diffusion assay for antibacterial activity. In addition, the different extracts of plant were screened by ABTS decolorization assay for antioxidant activity. Results: The highest inhibition zone in bacteria were determined on Staphylococcus sp. BFT12 (21 mm). MIC value was determined as 3250 µg/mL. The highest antioxidant activity of the plant was determined from aqueous extract of plant. This scavenging activity is about 88%. Discussion/Conclusion: The extracts of the plant have high antibacterial and antioxidant potential.

Plants are an important source of substances which are claimed to induce biological activities. Although there are a few studies on antimicrobial and antioxidant activities of this plant, antimutagenic activity has not been studied and there is no study in Turkey. Antibacterial activities of Syzygium aromaticum against oral pathogens have not been reported until today. The scope of this work was to investigate the biological activities of S. aromaticum different extracts. The various extracts were screened for antibacterial activity. The bacteria were isolated from oral flora by traditional methods. The plant extracts were tested by Kirby-Bauer method. Other antibacterial activities tests are MIC (minimum inhibitory concentration) and MBC (minimum bactericidal concentration). In addition to, the antioxidant activities of plant extracts were screened by the stable DPPH (2, 2-diphenyl-1-picrylhydrazyl hydrate) free-radical. The antimutagenicity of the plant extracts were determined by Ames test using Salmonella typimurium strains. The highest antibacterial activity was determined as 20 mm inhibition zone from methanol extracts. The highest DPPH scavenging activity was found as 82% from aqueous extract. S. aromaticum extracts have antibacterial, antioxidant and antimutagenic potentials. Our results support the use of this plant in traditional medicine and show that some of the plant extracts possess compounds with good biological activities. INTRODUCTION: Dental caries are one of the public health concerns for several reasons. Teeth affected with dental caries are sources of infection, which can cause an inflammation of dental pulp, periodonteum and gums. If left untreated, this disease gradually leads to teeth loss, which causes chewing difficulties and aesthetic problems 1. It remains one of the most widespread diseases of the mankind. In developing countries, dental caries is often at epidemic proportions, especially among the poor.