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Abstrak :
Candida glabrata adalah spesies kedua yang terisolasi pada kandidiasis oral setelah Candida albicans. Nigella sativa (jintan hitam) dilaporkan memiliki efek antijamur. Tujuan penelitian ini adalah menganalisis efek antijamur ekstrak biji Nigella sativa terhadap viabilitas Candida glabrata. Candida glabrata ditambahkan ke dalam 96 microwell plate yang telah dilapisi saliva buatan kemudian dipajankan dengan ekstrak biji Nigella sativa 6.25%-50% dan amphotericin B 250 mg/ml. Dilakukan pengujian viabilitas Candida glabrata dengan uji MTT. Viabilitas Candida glabrata lebih rendah setelah pamajanan dengan ekstrak biji Nigella sativa dibandingkan kontrol negatif. Viabilitas Candida glabrata semakin menurun seiring dengan peningkatan konsentrasi ekstrak biji Nigella sativa. ......Candida glabrata is the second most frequently isolated species from Oral Candidiasis, after Candida albicans. Nigella sativa (black cumin) is reported has antifungal effect. This research was to analyze Nigella sativa antifungal effect Seeds’ extract to the Candida glabrata viability. Candida glabrata was added on 96-microwell plate that had been coated with artificial saliva and exposed to 6.25-50% Nigella sativa seeds’ extract and amphotericin B 250 mg/ml. Candida glabrata viability was determined by MTT assay. Candida glabrata viability was lower after exposed by Nigella sativa seeds’ extract than negative control. Candida glabrata viability was decreased with increasing Nigella sativa seeds’ extract concentrations.

Abstrak :
Latar belakang : Nigella sativa dilaporkan memiliki efek antijamur terhadap Candida albicans. Candida albicans adalah jamur yang menyebabkan kandidiasis oral. Tujuan : Menganalisis efektivitas antijamur ekstrak biji Nigella sativa terhadap viabilitas Candida albicans. Metode : Candida albicans ditambahkan pada 96-microwell plate yang telah dilapisi saliva buatan, kemudian dipaparkan ekstrak biji Nigella sativa dengan konsentrasi 6.25%-50% dan amphotericin B 1µl (250mg/ml) sebagai kontrol positif. Viabilitas Candida albicans dihitung dengan uji MTT. Hasil : Nilai optical density Candida albicans lebih rendah setelah pemberian ekstrak biji Nigella sativa dibandingkan dengan kelompok tanpa perlakuan. Kesimpulan : Viabilitas Candida albicans setelah dipaparkan ekstrak biji Nigella sativa turun dibandingkan dengan kelompok tanpa perlakuan dan viabilitas Candida albicans menurun seiring dengan peningkatan konsentrasi ekstrak biji Nigella sativa. ......Back ground : Nigella sativa has antifungal effect against Candida albicans. Candida albicans is a fungi that causes oral candidiasis. Objective : To analyze the antifungal effectiveness of the extract of Nigella sativa seed on the viability of Candida albicans. Methods : Candida albicans was added on 96-well plate that had lined been by artificial saliva and exposed by the extract of Nigella sativa seed 6.25%-50% and amphotericin B 1µl (250mg/µl) was used as positive control. The viability of Candida albicans was determined by MTT assay. Result : The optical density value of Candida albicans after exposed by the extract of Nigella sativa seed was lower than the negative control. Conclusion : The viability of Candida albicans after exposed by the extract of Nigella sativa seed was decreased than the negative control and viability of Candida albicans was decreased as increasing concentrations of the extract of Nigella sativa seed.

Abstrak :
[ABSTRAK
Penyakit diare masih merupakan masalah serius di Indonesia, terutama pada anak-anak. Salah satu patogen tersering penyebab diare adalah Escherichia coli, terutama ETEC. Penggunaan Nigella sativa untuk berbagai penyakit sudah diteliti, namun hasil penelitian terhadap Escherichia coli belum konklusif. Oleh karena itu dilakukan percobaan untuk mengetahui potensi antibakteri Nigella sativa Linn. terhadap Escherichia coli. Penelitia dilakukan di Laboratorium Mikrobiologi FKUI secara in vitro, menggunakan metode sumuran. Konsentrasi ekstrak N. sativa yang digunakan ialah 1000 mg/ml, 500 mg/ml, 250 mg/ml, 125 mg/ml, dan 62,5 mg/ml, dengan siprofloksasin sebagai kontrol positif dan akuades sebagai kontrol negatif. Percobaan dilakukan tiga kali dengan pengulangan masing-masing empat kali. Pada penelitian ini tidak ditemukan adanya efek antibakteri Nigella sativa Linn. terhadap Escherichia coli. Hal ini dapat disebabkan oleh karakteristik Nigella sativa di Indonesia

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ABSTRACT
Diarrhea is still a serious problem in Indonesia, especially in children. One of the most common pathogen causing diarrhea is Escherichia coli, particularly ETEC. The use of Nigella sativa for various diseases have been studied, but the results of a study of Escherichia coli has not been conclusive. Therefore an experiment is conducted to determine the antibacterial activity of Nigella sativa Linn. against Escherichia coli. The experiment is conducted at the Laboratory of Microbiology Faculty of Medicine in vitro, using agar dilution method. N. sativa extract concentration used was 1000 mg / mL, 500 mg / mL, 250 mg / mL, 125 mg / ml, and 62.5 mg / ml, with ciprofloxacin as a positive control and distilled water as a negative control. Experiments were performed three times with each repetition of four times. The study results show no antibacterial effects of Nigella sativa Linn. against Escherichia coli. It can be caused by the characteristics of Nigella sativa in Indonesia;Diarrhea is still a serious problem in Indonesia, especially in children. One of the most common pathogen causing diarrhea is Escherichia coli, particularly ETEC. The use of Nigella sativa for various diseases have been studied, but the results of a study of Escherichia coli has not been conclusive. Therefore an experiment is conducted to determine the antibacterial activity of Nigella sativa Linn. against Escherichia coli. The experiment is conducted at the Laboratory of Microbiology Faculty of Medicine in vitro, using agar dilution method. N. sativa extract concentration used was 1000 mg / mL, 500 mg / mL, 250 mg / mL, 125 mg / ml, and 62.5 mg / ml, with ciprofloxacin as a positive control and distilled water as a negative control. Experiments were performed three times with each repetition of four times. The study results show no antibacterial effects of Nigella sativa Linn. against Escherichia coli. It can be caused by the characteristics of Nigella sativa in Indonesia;Diarrhea is still a serious problem in Indonesia, especially in children. One of the most common pathogen causing diarrhea is Escherichia coli, particularly ETEC. The use of Nigella sativa for various diseases have been studied, but the results of a study of Escherichia coli has not been conclusive. Therefore an experiment is conducted to determine the antibacterial activity of Nigella sativa Linn. against Escherichia coli. The experiment is conducted at the Laboratory of Microbiology Faculty of Medicine in vitro, using agar dilution method. N. sativa extract concentration used was 1000 mg / mL, 500 mg / mL, 250 mg / mL, 125 mg / ml, and 62.5 mg / ml, with ciprofloxacin as a positive control and distilled water as a negative control. Experiments were performed three times with each repetition of four times. The study results show no antibacterial effects of Nigella sativa Linn. against Escherichia coli. It can be caused by the characteristics of Nigella sativa in Indonesia, Diarrhea is still a serious problem in Indonesia, especially in children. One of the most common pathogen causing diarrhea is Escherichia coli, particularly ETEC. The use of Nigella sativa for various diseases have been studied, but the results of a study of Escherichia coli has not been conclusive. Therefore an experiment is conducted to determine the antibacterial activity of Nigella sativa Linn. against Escherichia coli. The experiment is conducted at the Laboratory of Microbiology Faculty of Medicine in vitro, using agar dilution method. N. sativa extract concentration used was 1000 mg / mL, 500 mg / mL, 250 mg / mL, 125 mg / ml, and 62.5 mg / ml, with ciprofloxacin as a positive control and distilled water as a negative control. Experiments were performed three times with each repetition of four times. The study results show no antibacterial effects of Nigella sativa Linn. against Escherichia coli. It can be caused by the characteristics of Nigella sativa in Indonesia]