scholarly journals Uji pigmen dan deteksi kapsul polisakarida pada Staphylococcus aureus isolat asal broiler PIGMENT TEST AND DETECTION OF POLISAKARIDA CAPSULES ON Staphylococcus aureus ISOLAT BROILER

2019 ◽  
Vol 20 (3) ◽  
pp. 369
Author(s):  
Khusnan Khusnan ◽  
Dwi Kusmanto
Keyword(s):  
Staphylococcus Aureus ◽  
Soft Agar ◽  
Pigment Production ◽  
Test Method ◽  
Production Test ◽  
Orange Pigment ◽  
Production Type ◽  
Polysaccharide Capsule ◽  
Polymerase Chain ◽  
Polysaccharide Capsules

Staphylococcus aureus is a pathogenic bacterium causing disease in humans and animals. In broilers it cause septicemia, tendosinovitis, dermatitis, endocarditis, wound infections and arthritis and bumblefoot. The ability of Staphylococcus aureus to cause disease depends on the virulence factors they bear. The purpose of this research is to investigate  the distribution of pigment production type and the existence of genes of polysaccharide capsule phenotype and genotype as determinant factor of virulence of bacteria on 15 isolates of Staphylococcus aureus from broiler. Pigment production test showed that 86.7% of isolates producing yellow pigment and 13.3% isolates produce orange pigment. The detection of polysaccharide capsules was phenotypically performed with hydrophobicity test with serum soft agar medium (SSA) showed 53.3% isolate grow compact and 46,7% isolate grown difuse and hydrophobicity test by salt aggregation test method (SAT) showed 66,7% hydrophil and 33.3% are hydrophobic. Genotype detection of polysaccharide capsule genes by polymerase chain reaction (PCR) showed 66.7% detected cap5 (amplicon 361bp) and 33.3% detected cap8 (173bp ampliole). The type of pigment production and the presence of polysaccharide capsules are some of the virulent factors in Staphylococcus aureus.

scholarly journals The small molecule ZY-214-4 may reduce the virulence of Staphylococcus aureus by inhibiting pigment production

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Jingyi Yu ◽  
Lulin Rao ◽  
Lingling Zhan ◽  
Bingjie Wang ◽  
Qing Zhan ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Survival Rate ◽  
Small Molecule ◽  
Quantitative Polymerase Chain Reaction ◽  
Inhibitory Effect ◽  
Pigment Production ◽  
Silkworm Larvae ◽  
Pigment Synthesis ◽  
Polymerase Chain ◽  
Oxidant Sensitivity

Abstract Background In recent years, clinical Staphylococcus aureus isolates have become highly resistant to antibiotics, which has raised concerns about the ability to control infections by these organisms. The aim of this study was to clarify the effect of a new small molecule, ZY-214-4 (C19H11BrNO4), on S. aureus pigment production. Results At the concentration of 4 μg/mL, ZY-214-4 exerted a significant inhibitory effect on S. aureus pigment synthesis, without affecting its growth or inducing a toxic effect on the silkworm. An oxidant sensitivity test and a whole-blood killing test indicated that the S. aureus survival rate decreased significantly with ZY-214-4 treatment. Additionally, ZY-214-4 administration significantly reduced the expression of a pigment synthesis-related gene (crtM) and the superoxide dismutase genes (sodA) as determined by real-time quantitative polymerase chain reaction (RT-qPCR) analysis. ZY-214-4 treatment also improved the survival rate of S. aureus-infected silkworm larvae. Conclusions The small molecule ZY-214-4 has potential for the prevention of S. aureus infections by reducing the virulence associated with this bacterium.

Staphylococcus aureus Nasal Carriage in Medical Students of Universiti Teknologi MARA

2017 ◽  
Vol 2 (1) ◽  
pp. 29 ◽  
Author(s):  
Zaini Mohd Zain ◽  
Muhammad Fikri Johari ◽  
Nurul Shahirah Mohd Husin ◽  
Nurul Syamimi Rozman ◽  
Athirah Ab Rashid ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Medical Students ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Nasal Carriage ◽  
Tissue Necrosis ◽  
Mannitol Salt Agar ◽  
Microbiological Techniques ◽  
Polymerase Chain ◽  
Low Prevalence ◽  
Panton Valentine Leukocidin

Introduction: To determine the prevalence of methicillin-resistant Staphylococcus aureus (MRSA) nasal carriage and detection of S. aureus leukotoxins among medical students of Universiti Teknologi MARA. Methods: Both sides of the anterior nares of 136 volunteers, comprising 68 preclinical and 68 clinical medical students, were swabbed and immediately cultured onto mannitol salt agar for growth of S. aureus. Standard microbiological techniques were conducted to identify and confirm the S. aureus colonies and susceptibility test against oxacillin were conducted by using Kirby-Bauer method to determine their resistance to methicillin. Polymerase chain reaction was performed for detection of leukotoxins, i.e., Panton-Valentine Leukocidin (PVL) and -haemolysin genes. Results: Nineteen students (14%) consisting of 10 preclinical (14.7%) and 9 clinical (13.2%) were nasal carriers of S. aureus. However, none of the S. aureus isolates were MRSA. No PVL gene was detected but eight of them were positive for -haemolysin gene. Conclusion: There were no MRSA nasal carriers among the medical students, but a low prevalence of S. aureus nasal carriers was detected. These carriers do not pose as high risk because none of the strains of S. aureus possess both the -haemolysin toxin and the PVL toxin that are associated with tissue necrosis.

Development of a Multiplex Polymerase Chain Reaction Assay for Detection and Differentiation of Staphylococcus aureus in Dairy Products†

2001 ◽  
Vol 64 (5) ◽  
pp. 664-668 ◽  
Author(s):  
SUDHIR TAMARAPU ◽  
JOHN L. McKILLIP ◽  
MARYANNE DRAKE
Keyword(s):  
Staphylococcus Aureus ◽  
Polymerase Chain Reaction ◽  
Multiplex Pcr ◽  
Dairy Products ◽  
Multiplex Polymerase Chain Reaction ◽  
Skim Milk ◽  
Cheddar Cheese ◽  
Polymorphism Analysis ◽  
Chain Reaction ◽  
Polymerase Chain

A multiplex polymerase chain reaction (PCR) assay was developed for the detection and differentiation of enterotoxigenic Staphylococcus aureus in dairy products. A solvent extraction procedure was successfully modified for extraction of S. aureus DNA from 10 ml of artificially contaminated skim milk or 20 g cheddar cheese. Primers targeting the enterotoxin C gene (entC) and thermostable nuclease gene (nuc) were used in the multiplex PCR. PCR products were confirmed using restriction fragment length polymorphism analysis. DNA was consistently quantified and amplified by uniplex PCR from 10 CFU/ml of S. aureus in skim milk or 10 CFU/20 g cheddar cheese. The sensitivity of the multiplex PCR was 100 CFU/ml of skim milk or 100 CFU/20 g cheddar cheese. The developed methodology allows presumptive identification and differentiation of enterotoxigenic S. aureus in less than 6 h.

scholarly journals FORMULASI SEDIAAN KRIM KOMBINASI EKSTRAK DAUN SELEDRI (Apium graveolens L.) DAN DAUN JATI (Tectona grandis Linn.F) SEBAGAI ANTIBAKTERI TERHADAP Staphylococcus aureus

PHARMACON ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 259
Author(s):  
Riska Tuloli ◽  
Hosea Jaya Edi ◽  
Imam Jayanto
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Leaf Extract ◽  
Tectona Grandis ◽  
Test Method ◽  
Apium Graveolens ◽  
Homogeneity Test ◽  
Cycling Test ◽  
Physical Tests ◽  
Dispersion Test

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

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

2009 ◽  
Vol 48 (175) ◽  
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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