Test Method for Evaluating the Bacterial Filtration Efficiency (BFE) of Medical Face Mask Materials, Using a Biological Aerosol of Staphylococcus aureus

ABSTRACT Celery plants (Apium graveolens L.) and teak plants (Tectona grandis Linn.f) are plants that contain flavonoids, tannins, and saponins and has antibacterial activity against Staphylococcus aureus. This study aims to test the antibacterial effectiveness of combination of celery and teak leaf cream and evaluate cream with parameters of physical tests (organoleptic, homogeneity, pH, spreadability, adhesion) and physical stability with cycling test method. This study used an experimental laboratory method by making 5 variations concentration of extracts. Celery and teak leaf extract was extracted by maceration method. Antibacterial test used the wells method. Results of the evaluation of physical tests for organoleptic test (odor: a typical combination of extracts;color: brown;shape: semi-solid), homogeneity test (homogeneous), average of pH test is 6.02, dispersion test is 4.27 cm, adhesion test is 18.42 seconds. Based on the results of this study, concluded that the combination of celery leaf and teak leaf extract can be formulated into a cream. The cream of combination of celery and teak leafs extract are bacteriostatic and has antibacterial activity with an average diameter for formulation I 13.4 mm, formulation II 9.23 mm, formulation III 16.23 mm, formulation IV 11 mm, and formulation V 12.06 mm. Keywords : Celery (Apium graveolens L.), Teak (Tectona grandis Linn.f), Antibacterial, Cream. ABSTRAK Tanaman seledri (Apium graveolens L.) dan tanaman jati (Tectona grandis Linn.f) merupakan tanaman yang mengandung flavonoid, tanin dan saponin dan memiliki aktivitas antibakteri terhadap Staphylococcus aureus. Penelitian ini bertujuan untuk menguji aktivitas antibakteri sediaan krim kombinasi ekstrak daun seledri dan daun jati serta mengevaluasi sediaan krim dengan parameter uji sifat fisik (uji organoleptik, uji homogenitas, uji pH, uji daya sebar, uji daya lekat) dan stabilitas fisik dengan metode cycling test. Penelitian ini menggunakan metode eksperimental laboratorium dengan membuat 5 variasi konsentrasi ekstrak. Ekstrak diperoleh dengan cara maserasi. Uji antibakteri dilakukan dengan metode sumuran. Hasil evaluasi sifat fisik untuk uji organoleptik (bau: khas kombinasi ekstrak;warna:coklat;bentuk:setengah padat), uji homogenitas (susunan homogen), rata-rata uji pH 6,02, daya sebar 4,27 cm, daya lekat 18,42 detik. Berdasarkan hasil penelitian disimpulkan bahwa kombinasi ekstrak daun seledri dan daun jati dapat diformulasikan menjadi sediaan krim. Sediaan krim kombinasi ekstrak daun seledri dan daun jati bersifat bakteriostatik dan memiliki aktivitas antibakteri dengan diameter rata-rata untuk formula I 13,4 mm, formula II 9,23 mm, formula III 16,23 mm, formula IV 11 mm, dan formula V 12,06 mm. Kata Kunci : Seledri (Apium graveolens L.), Jati (Tectona grandis Linn.f), Antibakteri, Krim

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Antibiotic Susceptibility Pattern of Nosocomial Isolates of Staphylococcus aureus in a Tertiary Care Hospital, Nepal

Journal of Nepal Medical Association ◽

10.31729/jnma.190 ◽

2009 ◽

Vol 48 (175) ◽

Cited By ~ 1

Author(s):

Bidya Shrestha ◽

B M Pokhrel ◽

T M Mohapatra

Keyword(s):

Staphylococcus Aureus ◽

Methicillin Resistant Staphylococcus Aureus ◽

Tertiary Care ◽

Test Method ◽

University Teaching ◽

Clinical Samples ◽

Resistance Pattern ◽

Care Hospital ◽

Biochemical Tests ◽

Methicillin Resistant

Introduction: Methicillin resistant Staphylococcus aureus (MRSA), the most common cause ofnosocomial infection has been a major cause of morbidity and mortality around the world. They arenormally resistant to most of the antibiotics used in clinical practice. This study has been carried outto fi nd out the resistance pattern among S. aureus.Methods: During November 2007 to June 2008, clinical samples from patients with nosocomialinfection were processed for culture and sensitivity following standard methodology in microbiologylaboratory, Tribhuvan University teaching hospital, Kathmandu, Nepal.Results: Among 149 Staphylococcus aureus isolates, highest resistance was observed against Penicillin(91.94%) followed by Fluoroquinolone (61.74%), Erythromycin (52.94%), Gentamicin (46.98%),Cotrimoxazole (42.95%), Tetracycline (40.94%) and others, whereas susceptibility was observedmaximum against Chloramphenicol (94.85%) followed by Rifampicin (92.61%), Tetracycline(59.06%), Cotrimoxazole (57.04%), and others. None of the isolates were resistant to Vancomycinand Teicoplanin. Of these isolates 44.96 % of the isolates were Methicillin resistant S. aureus (MRSA).Resistance to Penicillin, Fluoroquinolone, Erythromycin, Gentamicin, Co-trimoxazole and Tetracyclinewere associated signifi cantly with MRSA isolates (X2= 8.779, p<0.05, X2= 74.233, p<0.05, X2= 84.2842,p<0.05, X2= 108.2032, p<0.05, X2= 88.1512, p<0.05 and X2= 79.1876, p<0.05 respectively). Althoughmost of the Methicillin sensitive S. aureus (MSSA) isolates were susceptible to both Rifampicinand Chloramphenicol, only Rifampicin susceptibility was signifi cantly associated with them (X2=10.1299, p<0.05). Among three Biochemical tests for the detection of β lactamase detection namelychromogenic, iodometric and acidimetric test, chromogenic test method had highest sensitivity andspecifi city.Conclusions: Since MRSA comprised a greater part of S. aureus isolates and were multi-resistant,patients infected by such strains should be identifi ed and kept in isolation for hospital infectioncontrol and treated with second line of drug like vancomycin.Key Words: β lactamase, methicillin resistant Staphylococcus aureus,methicillin sensitive Staphylococcus aureus, resistance pattern

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