A. Bita

Bio: A. Bita is an academic researcher. The author has contributed to research in topics: Nalidixic acid & Ampicillin. The author has an hindex of 3, co-authored 4 publications receiving 51 citations.

An alternative treatment for Candida infections with Nigella sativa extracts

Abstract: Background Nigella sativa is a herb from the Mediterranean region with antidiabetic, bronchodilator, antioxidant, hepatoprotective, lipid lowering, anti-inflammatory and analgesic properties. Purpose This study aimed to reveal the antifungal activity of aqueous, methanolic and chloroform extracts obtained from the plant seeds, compared with the effect of traditional antifungals. Materials and methods Using standard mycological diagnostic methodology The authors isolated and identified 20 strains of Candida albicans from pathological products collected from patients hospitalised in different departments of the Craiova Emergency Hospital. Aqueous, methanolic and chloroform extracts were made from the seeds of Nigella sativa, in decreasing dilutions, in which Wattman filter paper discs were soaked and dried and then used to achieve the antifungal graph by using the Kirby-Bauer diffusion technique. Simultaneously, the testing was repeated using standard antifungal disks (Becton Dickinson) and the two sets of results compared. The antifungal effect was assessed by measuring the diameter of the inhibition zone, noting the concentration per disk. Results The results show that methanolic extracts of Nigella sativa have the strongest antifungal effect followed by the chloroform extracts. Aqueous extracts showed no antifungal activity. Conclusions The research shows treatment with natural products in a good light as an alternative for treating fungal infections. The authors envisage Nigella sativa extract enhancing the effect of conventional therapy.

Synergic antifungal and antibacterial activity of alcoholic extract of the species Robinia pseudoacacia L. (Fabaceae)

Abstract: Background Plant species Robinia pseudoacacia L. (Fabaceae) has been used as a medicinal plant since ancient times, as its infusions and extracts have antacid, antibacterial, purgative and emenagogic properties. The volatile oil of the flowers is also used in perfumery and cosmetics. Purpose Due to its high content of volatile oil phenolic compounds, flavonoids and tannins with antimicrobial properties, the present study proposed to investigate the antibacterial and antifungal effect of the species Robinia pseudoacacia. Materials and methods The dry powdered flowers, leaves, bark and seeds of Robinia pseudoacacia were subjected to extraction in a Soxhlet extractor with 90% ethanol. The alcoholic extract obtained in the concentration of 100 mg / ml, was tested using sterile discs of Whatman No. 1 filter paper, impregnated with 100 mg extract. Antibacterial and antifungal effects was evaluated by the Kirby-Bauer disc diffusion method, in accordance with the NCCLS / CLSI standard, using the following infectious agents isolated from patients and the corresponding reference strains: methicillin-resistant Staphylococcus aureus and methicillin-sensitive haemolytic S. epidermidis, Streptococcus pyogenes, Enterococcus, Enterobacter aerogenes, Escherichia coli, Salmonella choleraesuis, Klebsiella pneumoniae, Pseudomonas aeruginosa, Proteus, Candida albicans. Results Extracts from various different parts of the plant had different antibacterial activities. Extracts of flowers and seeds are efficient antibacterials for Gram positive cocci. Bark and leaf extracts were active against Escherichia coli, Pseudomonas, Proteus, Salmonella choleraesuis, Candida albicans. Conclusions These results prove the antimicrobial or antifungal properties of certain extracts of Robinia pseudoacacia L., which offers an alternative treatment with a natural product with synergistic effects with conventional antibacterial treatment.

Study concerning vulvovaginal candidiasis in women with diabetes

Abstract: Background Changes in glucidic metabolism characteristic of diabetes are a contributing factor in causing vulvovaginal candidiasis. Purpose The objective of this study was evaluating the prevalence of morbidity through vaginal candidiasis with Candida albicans in diabetic women and instituting of specific antifungal therapy. Materials and methods The study was conducted on 140 women (aged between 22-40 years) with diabetes, admitted in the Diabetes and Nutrition diseases clinic from Clinical Emergency Hospital of Craiova, Romania, from who were harvested blood and vaginal secretions. Blood sugar levels were determined by biochemical methods. The vaginal secretions were subjected to mycological diagnosis (Gram stain, isolation on Sabouraud media, identification by using chromogenic differential media specific for Candida). The isolates strains were subjected to fungal sensitivity test, using commercial kits: ATB Fungus 3 (BioMerieux, Marcy l’Etoile, France) and Candifast (EliTech France SAS) (5-Fluorocytosine, Amphotericin B, Fluconazole Itraconazole, Voriconazole, Econazole, Miconazole, Ketoconazole and Nystatin). The data was analysed using the Student9s t-test. Results The authors isolated 98 strains of Candida albicans, thus the morbidity by candidiasis was 70%, most of the patients had blood sugar levels between 130–180 mg/dl. The condition was more common in patients aged between 51-60 years (39.80%) and 41-50 years (31.63%). The results of antifungigram showed susceptibility to: Ketoconazole (95.92%), Econazole (89.80%), Fluconazole (85.71%) and Itraconazole (85.71%). Conclusions These results demonstrate the existence of a correlation between hyperglycaemia and vaginal candidiasis. Most of the vulvovaginal candidiases were treated successfully with new antifungal drugs. Although regarded as a banal infection by some, the increased incidence of vaginal candidiasis associated with diabetes raises additional issues regarding prevention and patient management.

Antimicrobial resistance of urinary Escherichia coli isolates

Abstract: Background Escherichia coli is the most common bacteria involved in the aetiology of the urinary tract infections (UTI). Purpose The aim of the study is to compare the susceptibility to antibacterial agents of Escherichia coli strains isolated from adults and children. Materials and methods The study was conducted between 1.01.2009-31.12.2010 on 192 patients divided in two groups. Group A-72 hospitalised children under 15 years with clinical signs of UTI. Group B – 120 adult outpatients who had presented various conditions of the reno-urinary tract. Urine samples were investigated using biochemical and microbiological (urine culture) methods. The authors used culture media to isolate specific bacterial species, whose identification was performed with API 20 E galleries. The antibiotic susceptibility test was performed on Mueller Hinton agar plates using the Kirby-Bauer disc diffusion method, according to NCCLS / CLSI – 2009 guidelines. Results The morbidity by UTIs in children was 40.90%, mostly in girls (54.4%), in the age group of 1-3 years (43.91%) and infants (37.16%). The isolated E. coli strains (65.2%) were resistant to Ampicillin (65.14%), Ciprofloxacin (30.12%), Cefuroxime (26.18%) and Nalidixic acid (14.92%). In adults the prevalence of UTIs was 43.33%, the infections were more common in women and in patients over 60 years. The isolated E. coli strains (55.77%) were resistant to Ampicillin (74.25%), Cefuroxime (39.29%), Ciprofloxacin (27.59%) and Nalidixic acid (24.14%). There was a significant difference in antibiotic resistance of the strains isolated from the two patient categories (Student9s T test, p=0.0168). Conclusions The tested strains of Escherichia coli involved in UTIs in adults had a higher resistance to antibiotics, compared with those isolated from children. It is recommended that the neonatologists, paediatricians and family physicians initiate therapy for these infections only after antibiotic susceptibility tests, in order to prevent selection of multidrug-resistant strains.

A review on therapeutic potential of Nigella sativa: A miracle herb

Abstract: Nigella sativa (N. sativa) (Family Ranunculaceae) is a widely used medicinal plant throughout the world. It is very popular in various traditional systems of medicine like Unani and Tibb, Ayurveda and Siddha. Seeds and oil have a long history of folklore usage in various systems of medicines and food. The seeds of N. sativa have been widely used in the treatment of different diseases and ailments. In Islamic literature, it is considered as one of the greatest forms of healing medicine. It has been recommended for using on regular basis in Tibb-e-Nabwi (Prophetic Medicine). It has been widely used as antihypertensive, liver tonics, diuretics, digestive, anti-diarrheal, appetite stimulant, analgesics, anti-bacterial and in skin disorders. Extensive studies on N. sativa have been carried out by various researchers and a wide spectrum of its pharmacological actions have been explored which may include antidiabetic, anticancer, immunomodulator, analgesic, antimicrobial, anti-inflammatory, spasmolytic, bronchodilator, hepato-protective, renal protective, gastro-protective, antioxidant properties, etc. Due to its miraculous power of healing, N. sativa has got the place among the top ranked evidence based herbal medicines. This is also revealed that most of the therapeutic properties of this plant are due to the presence of thymoquinone which is major bioactive component of the essential oil. The present review is an effort to provide a detailed survey of the literature on scientific researches of pharmacognostical characteristics, chemical composition and pharmacological activities of the seeds of this plant.

Black cumin (Nigella sativa) and its constituent (thymoquinone): a review on antimicrobial effects

Abstract: Nigella sativa seeds have wide therapeutic effects and have been reported to have significant effects against many ailments such as skin diseases, jaundice, gastrointestinal problems, anorexia, conjunctivitis, dyspepsia, rheumatism, diabetes, hypertension, intrinsic hemorrhage, paralysis, amenorrhea, anorexia, asthma, cough, bronchitis, headache, fever, influenza and eczema. Thymoquinone (TQ) is one of the most active constituent and has different beneficial properties. Focus on antimicrobial effects, different extracts of N. sativa as well as TQ, have a broad antimicrobial spectrum including Gram-negative, Gram-positive bacteria, viruses, parasites, schistosoma and fungi. The effectiveness of N. sativa seeds and TQ is variable and depends on species of target microorganisms. The present review paper tries to describe all antimicrobial activities that have been carried out by various researchers.

Prevalence of Candida albicans and non-albicans isolates from vaginal secretions: comparative evaluation of colonization, vaginal candidiasis and recurrent vaginal candidiasis in diabetic and non-diabetic women

Abstract: CONTEXT AND OBJECTIVE: Vulvovaginal candidiasis (VVC) is caused by abnormal growth of yeast-like fungi on the female genital tract mucosa. Patients with diabetes mellitus (DM) are more susceptible to fungal infections, including those caused by species of Candida. The present study investigated the frequency of total isolation of vaginal Candida spp., and its different clinical profiles - colonization, VVC and recurrent VVC (RVVC) - in women with DM type 2, compared with non-diabetic women. The cure rate using fluconazole treatment was also evaluated. DESIGN AND SETTING: Cross-sectional study conducted in the public healthcare system of Maringa, Parana, Brazil. METHODS: The study involved 717 women aged 17-74 years, of whom 48 (6.7%) had DM type 2 (mean age: 53.7 years), regardless of signs and symptoms of VVC. The yeasts were isolated and identified using classical phenotypic methods. RESULTS: In the non-diabetic group (controls), total vaginal yeast isolation occurred in 79 (11.8%) women, and in the diabetic group in 9 (18.8%) (P = 0.000). The diabetic group showed more symptomatic (VVC + RVVC = 66.66%) than colonized (33.33%) women, and showed significantly more colonization, VVC and RVVC than seen among the controls. The mean cure rate using fluconazole was 75.0% in the diabetic group and 86.7% in the control group (P = 0.51). CONCLUSION: We found that DM type 2 in Brazilian women was associated with yeast colonization, VVC and RVVC, and similar isolation rates for C. albicans and non-albicans species. Good cure rates were obtained using fluconazole in both groups.