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Candidiasis is the most opportunistic infection with a high rate of recurrent infection. Salvia macrosiphon has an antibacterial effect; however, its antifungal effect was not studied. This study aimed to investigate the chemical composition of essential oil from leaves of Salvia macrosiphon and its antifungal activity compared with fluconazole.

Salvia macrosiphon leaves, a native plant of Kogiluyeh and Boyerahmad province, were collected from Zagros Heights and used in this study. Then, the essential oil of this plant was tested for antibacterial and antifungal properties and compared with fluconazole.  The chemical composition of the essential oil was analyzed by GC/MS (Gas Chromatography Mass Spectrometry), and the antifungal activity of the plant's essential oil was compared with that of fluconazole.

The results of GC-MS analysis proved the presence of at least 29 compounds in the essential oil of Salvia macrosiphon. Amon these constitute butyl benzoate (49.16%), n-hexyl benzoate (7%), and isopatolenol (4.83%) were the main compounds. The minimum inhibitory concentration (MIC) of the essential oil (µl/ml) of Salvia macrosiphon and fluconazole (μg/ml) were 0.44 and 0.7 for Candida albicans, 0.056 and 0.7 for C. glabrata, and 0.1 and 0.088 for C. parapsilosis, respectively. Also, statistical analysis demonstrated a significant difference between the mean of fluconazole and essential oil in total Candida isolates (p=0.001).

The essential oil of Salvia macrosiphon has stronger antifungal activity than fluconazole.

In machine learning, models are derived from labeled training data where labels signify classes and features define sample attributes. However, noise from data collection can impair the algorithm’s performance. Blanco, Japón, and Puerto proposed mixed-integer programming (MIP) models within support vector machines (SVM) to handle label noise in training datasets. Nonetheless, it is imperative to underscore that their models demonstrate an observable escalation in the number of variables as sample size increases. The nonparallel support vector machine (NPSVM) is a bi-nary classification method that merges the strengths of both SVM and twin SVM. It accomplishes this by determining two nonparallel hyperplanes by solving two optimization problems. Each hyperplane is strategically po-sitioned to be closer to one of the classes while maximizing its distance from the other class. In this paper, to take advantage of NPSVM’s fea-tures, NPSVM-based relabeling (RENPSVM) MIP models are developed to deal with the label noises in the dataset. The proposed model adjusts observation labels and seeks optimal solutions while minimizing compu-tational costs by selectively focusing on class-relevant observations within an ϵ-intensive tube. Instances exhibiting similarities to the other class are excluded from this ϵ-intensive tube. Experiments on 10 UCI datasets show that the proposed NPSVM-based MIP models outperform their counter-parts in accuracy and learning time on the majority of datasets.

Lamiaceae family are compromised the majority of species of the family have essence that was used for the nutritional, cosmetic, and pharmaceutical industry. This study aimed to investigate the chemical composition of essential oil from aerial parts of Bollota aucheri with its antibacterial and antifungal activity of it compared with fluconazole.

This clinical laboratory research was conducted on the flowering aerial parts of B. aucheri that were collected during 2020-2021 from Zagros mountains in Kohgiluyeh and Boyer-Ahmad province, Iran. The essential oil of this plant was tested for antibacterial and antifungal properties and compared with fluconazole.  The chemical composition of the essential oil was analyzed by GC/MS (Gas Chromatography Mass Spectrometry) and the antifungal activity of the plant essential oil was compared with fluconazole.

Generally, β-Caryophyllene was the main compound of B. aucheri essential oil. The minimum inhibitory concentration (MIC) of the essential oil of the fruit of B. aucheri and fluconazole were 0.078µl/ml and 1µl/ml for Candida albicans, 0.078µl/ml and 0.5µl/ml for C. glabrata, and 0.078µl/ml and 0.178µl/ml for C. parapsilosis, respectively.

The essential oil of B. aucheri could be used as a bactericidal and fungal alternative to antibiotics against microorganisms. Antifungal activity of B. aucheri essential oil is stronger than fluconazole.

Because of the increasing prevalence of fungal infections and antifungal resistance, researchers are seeking new antifungal medications and alternatives. This study aimed to assess the antifungal and anti-biofilm propertie of Myrtus communis L. essential oil and effect of hydroalcoholic extract on Candida species isolated from clinical specimens.

A total of 65 Candida species isolated from clinical samples were evaluated in this study. The chemical composition of the essential oil was analyzed by gas chromatography-mass spectrometry (GC-MS). Besides, the antifungal and biofilm activity of M. communis against Candida isolates was compared with that of fluconazole

A total of 22 compounds, displaying 99.88% of the Myrtus Communis leaves OE, were identified and the major components were found to be α-pinene (51.22%), eucalyptol (16.88%), linalool (15.92%), and linalool acetate (4.03%). The main components of fruit EO were nonadecane (44.00%), heneicosane (19.60%), α-pinene (12.80%), and eucalyptol (10.08%). The minimum inhibitory concentration (MIC) of the hydroalcoholic extract of M. communis was lower against C. parapsilosis compared to C. albicans and C. glabrata. Biofilm formation in different Candida strains was inhibited at M. communis essential oil concentrations of 2.5-0.0156µl/mL.

M. communis exhibited considerable antifungal effects against Candida species. Also, the inhibitory effect of M. communis essential oil against C. albicans biofilm formation was higher than that of fluconazole.

 Teucrium polium is a medicinal plant that is used due to its antispasmodic and antimicrobial properties. This study aimed to evaluate the effect of the essential oil of T. polium against fungal, bacterial strains, and Giardia lamblia.

 In this clinical laboratory study, Teucrium polium was collected from the Dena mountain area in Yasuj, Iran. Essential oil was prepared from plant powder. Clinical Aspergillus species were isolated from otomycosis patients. For Candida species, the researchers used clinical isolates with otomycosis and vaginitis origin. 33 Aspergillus strains, 49 Candida species, and 33 non-albicans species were used as samples. The samples were collected and cultured on Sabouraud dextrose agar and identified based on PCR-sequencing analysis. Different concentrations of essential oil were assessed by broth microdilution method against clinical fungi and bacterial isolates. Also, anti-Giardia activity of this essential oil was investigated at different times and concentrations. Chemical analysis of the essential oil was done by Gas Chromatography–Mass Spectrometry.

 The inhibitory effect of essential oil of T. polium on Candida and Aspergillus strains was varied and dependent on species. Generally, the effect of essential oil on non-albicans species was better than C. albicans isolates. Also, essential oil had an inhibitory effect on E. coli and Klebsiella but did not affect methicillin-resistant Staphylococcus aureus. Its effect on Giardia isolates was dependent on time and concentration. Oxygenated monoterpenes are the major compound of T. polium.

 Teucrium polium essential oil has a considerable inhibitory effect on different strains of microorganisms.

Adenoid hypertrophy is one of the childhood complications in which bacteria are involved in its etiology. The aim of the present study was to determine the relative abundance of biofilms and genes associated with biofilm formation in Staphylococcus aureus isolates and also to determine the genotypic patterns of S. aureus isolates from adenoids and tonsils of children with adenoid hypertrophy by Spa typing method.

The present cross-sectional study was conducted on 86 pair isolates of S. aureus collected from adenoid and tonsil of children with adenoid hypertrophy. Phenotypic method used for assessing of biofilm production in S. aureus isolates and the presence of icaA,icaD,fnbA and clfA genes evaluated using polymerase chain reaction method. The spa typing method was apllied for typing of isolated. Data were analyzed using descriptive statistics method and SPSS software.

S. aureus isolated from adenoids and tonsils were positive in 49 (57%) and 40 (46.5%) biofilms, respectively. In 47 cases, pairs of isolates from the adenoids and tonsils were similar in terms of biofilm production. In the present study, 4 types of spa types were identified in S. aureus including t081 type, the most dominant type in 67.5%, t701 in 11.6%, t2419 in 9.3% and t4870 in 8.2% of adenoid isolates. In total, 79.45% of adenoid and tonsil isolates had similar typing. highest frequency of genes was related to fnbA, which was detected in adenoids in 64% and in tonsils in 41.9% of isolates.

Due to the relative frequency of biofilm formation, biofilm is of moderate importance in the establishment of Staphylococcus aureus in the tonsils and adenoids of patients. Moreover, the role of fnbA gene in biofilm formation was higher than other studied genes. High spa similarity Staphylococcus aureus isolates isolated from the adenoids and tonsils indicate the initial colonization of bacteria in the tonsils and then act as a source of infection for the adenoids.