scholarly journals Some cultural characteristics ofStaphylococcus aureusstrains from superficial skin infections

1958 ◽  
Vol 56 (2) ◽  
pp. 238-253 ◽  
Author(s):  
M. T. Parker

1. A collection of 1389 strains ofStaphylococcus aureusof human origin was examined by the following tests: phage typing, antibiotic resistance, ability to inhibit the growth ofCorynebacterium diphtheriae, the egg-yolk reaction and the serum opacity reaction.2. Nearly all strains ofStaph. aureusType 71 were penicillin resistant, inhibitedC. diphtheriae, gave a negative egg-yolk reaction, and produced a zone of opacity on horse-serum agar.3. The penicillin resistance of Type 71 strains is unlikely to have arisen as a result of the therapeutic use of penicillin, and is probably a natural characteristic of the type.4.Staph. aureusstrains which gave a negative egg-yolk reaction and a positive serum opacity reaction occurred almost exclusively in superficial lesions. The majority of them were members of Type 71, or were penicillin-resistant members of phage-group III. It is suggested that these organisms can cause superficial inflammation, but are usually unable to invade deeper tissues.I wish to thank Dr A. J. H. Tomlinson for valuable information about his unpublished work on impetigo. Thanks are also due to many colleagues who have provided cultures and clinical information, to Dr R. E. O. Williams for typing phages, and to Mr L. E. Simmons for technical assistance.

1964 ◽  
Vol 62 (2) ◽  
pp. 229-237 ◽  
Author(s):  
E. J. L. Lowbury ◽  
B. J. Collins

Staph. aureusfrom burns of in-patients were tested for egg yolk reaction during three periods; in 1958 and in 1960 approximately 80 % of the strains gave a negative reaction (EY-), but in 1962 only 36 % of the strains were egg yolk negative.Staphylococci of phage group III were more commonly EY- than those of other groups isolated from burns. Within each of groups I and III, however, there were patterns predominantly EY- and others predominantly egg yolk positive (EY+); in group I the majority of strains isolated in 1960 were of phage type 52 and EY-, while those isolated in 1962 were predominantly of phage type 80 or related patterns which were always EY+.Most of the staphylococci in burns were resistant to penicillin, tetracycline and erythromycin; within groups I and III, the staphylococci which were EY- were also more commonly resistant than EY+ strains to these three antibiotics.Most of the staphylococci from burns were mercuric chloride resistant (presumptive epidemic strains); of the mercuric chloride sensitive staphylococci, the proportion of EY+ strains was greater than that of EY- strains.


PEDIATRICS ◽  
1959 ◽  
Vol 24 (1) ◽  
pp. 40-42
Author(s):  
Fred E. Pittman ◽  
Calderon Howe ◽  
Louise Goode ◽  
Paul A. di Sant'Agnese

In this study, 198 strains of hemolytic, coagulase-positive Staph. aureus were recovered from 84 patients with cystic fibrosis of the pancreas and some of their relatives. The majority of the organisms fell into phage group III and were resistant in vitro to penicillin and other antibiotics. No single phage type seemed to be unduly prevalent in this group of patients with cystic fibrosis of the pancreas.


1973 ◽  
Vol 71 (1) ◽  
pp. 171-183 ◽  
Author(s):  
Anna Hambraeus

SUMMARYA one-year epidemiological investigation was made in an isolation ward for burned patients. The transmission of Staphylococcus aureus was mainly studied. In spite of the design of the ward the cross-infection rate was high. In all, 49 of 69 patients were infected 114 times. Twenty-six of the strains causing infection were found in a patient only, 10 in a member of the staff only and 23 in both patients and staff the week before they caused a new infection. There were three epidemic outbreaks caused by three strains of Staph. aureus all belonging to phage group III; one was resistant to methicillin. Environmental studies with settle plates showed that the number of staphylococci dispersed by a burned patient was often very high. In 8% of the observations in occupied bedrooms the air count of Staph. aureus was more than 1800 col./m.2 hr. However, the counts of Staph. aureus in the corridor and service areas were low. This seems to indicate a rather good protection against airborne transfer of bacteria. Other routes of infection were probably of greater importance.


2012 ◽  
Vol 36 (1) ◽  
pp. 51
Author(s):  
Julizar Julizar ◽  
Lili Irawati ◽  
Erlina Rustam

AbstrakPenyakit jantung koroner (PJK) merupakan penyebab utama kematian di berbagai belahan dunia termasuk di Indonesia. Salah satu pemicu terjadinya PJK adalah tingginya kadar kolesterol dalam darah. Buah mahkota dewa telah lama digunakan oleh masarakat untuk menurunkan kadar kolesterol dan mengobati berbagai penyakit kardiovaskuler.Telah dilakukan penelitian untuk melihat efek infus buah mahkota dewa terhadap pencegahan peningkatan kadar kolesterol pada tikus putih jantan yang diberi diet lemak tinggi (DLT). Penelitian ini menggunakan 30 ekor Rattus novergicus jantan yang berumur 2,5 – 3 bulan dengan berat badan 250 - 350 gram. Hewan coba dibagi secara acak atas lima kelompok dan diperlakukan sebagai berikut:Kelompok I diberi diet standar 555 global feed dan 1 ml aquades, kelompok II diberi diet lamak tinggi(DLT) yang terdiri dari 2% Kolesterol, 10% kuning telur itik, 18% lemak sapi dan 78% diet standar dan 1 ml aquades, kelompok III diberi DLT dan 1 ml infus yang mengandung 97 mg mahkota dewa., kelompok IV diberi DLT dan 1 ml infus yang mengandung 194 mg mahkota dewa, kelompok V diberi DLT dan 1 ml infus yang mengandung 388 mg mahkota dewa. Infus diberikan per oral setiap hari selama 56 hari. Diet dan air minum diberikan ad libitum.Pada hari ke 0, 14, 28, 42 dan 56 darah diambil melalui vena centralis ekor untuk ditentukan kadar kolesterol totalnya secara enzimatik menggunakan KIT kolesterol CHOD-PAP merk Diasys. Absorbans diukur dengan spektrofotometer Genesis 20 pada panjang gelombang 546 nm. Data dianalisis dengan GLM pengukuran berulang dan one-way anova.Hasil penelitian menunjukan : pemberian infus yang mengandung 97, 194 dan 388 mg mahkota dewa dapat mencegah peningkatan kadar kolesterol dibanding kontrol (-). Terdapat perbedaan yang signifikan (p<0,05) antara kelompok 194 dan 388 mg dengan kelompk 97 mg, dimana kelompok 194 dan 388 mg mencegah peningkatan lebih besar. Tidak terdapat perbedaan (p>0,05) antara kelompok yang mendapat 194 dengan kelompok yang mendapat 388 mg mahkota dewa.ARTIKEL PENELITIAN52Disarankan untuk meneliti efek pencegahan peningkatan pada profil lipid yang lain dan melihat efek penurunan infus mahkota dewa pada hewan coba yang hiperkolesterolemik.Kata kunci : Mahkota dewa, kolesterolAbstractCoronary heart disease (CHD) is the leading cause of death in many parts of the world including in Indonesia. One of the triggers of CHD are high blood cholesterol levels. The Crown of God (Phaleria macrocarpa) has long been used by people to lower cholesterol and treat various cardiovascular diseases. Has done research to observe the effect of infusion Phaleria to prevent an increase in cholesterol levels in male white rats fed a high fat diet (HFD). This study used 30 male Rattus novergicus old from 2.5 to 3 months with body weight 250-350 grams. Experimental animals were randomized over five groups and treated as follows:Group I was given a standard diet 555 of global feed and 1 ml aquades, group II were given a diet high fat (HFD) consisting of 2% cholesterol, 10% of duck egg yolk, beef 18% fat and 78% standard diet and 1 ml aquades, group III was given the DLT and 1 ml infusion containing 97 mg of crown gods., group IV were given DLT and 1 ml infusion containing 194 mg crown of god, group V were given HFD and 1 ml infusion containing 388 mg the crown of god. Infusion given orally every day for 56 days. Diet and drinking water provided ad libitum.On days 0, 14, 28, 42 and 56 blood was collected via the tail vein centralis for total cholesterol is determined enzymatically using cholesterol Chod-PAP KIT Diasys. Absorbance was measured with a spectrophotometer Genesis 20 at 546 nm wavelength. Data were analyzed by GLM repeated measurements and one-way ANOVA.The results showed: the infusion containing 97, 194 and 388 mg crown of god can prevent an increase in cholesterol levels compared to controls (-).There are significant differences (p <0.05) between groups 194 and 388 mg with 97 mg faction, which groups 194 and 388 mg prevent the increase is greater. No difference (p> 0.05) between the group receiving 194 with the group receiving 388 mg crown of gods.It is advisable to examine the effect of preventing an increase in other lipid profiles and observe the effect of decreasing infusion crown of gods on hypercholesterolemic animal.Key word : Phaleria macrocarpa, cholseterol


2017 ◽  
Vol 86 (2) ◽  
Author(s):  
T. Chang ◽  
J. W. Rosch ◽  
Z. Gu ◽  
H. Hakim ◽  
C. Hewitt ◽  
...  

ABSTRACTBacillus cereusremains an important cause of infections, particularly in immunocompromised hosts. While typically associated with enteric infections, disease manifestations can be quite diverse and include skin infections, bacteremia, pneumonia, and meningitis. Whether there are any genetic correlates of bacterial strains with particular clinical manifestations remains unknown. To address this gap in understanding, we undertook whole-genome analysis ofB. cereusstrains isolated from patients with a range of disease manifestations, including noninvasive colonizing disease, superficial skin infections, and invasive bacteremia. Interestingly, strains involved in skin infection tended to form a distinct genetic cluster compared to isolates associated with invasive disease. Other disease manifestations, despite not being exclusively clustered, nonetheless had unique genetic features. The unique features associated with the specific types of infections ranged from traditional virulence determinants to metabolic pathways and gene regulators. These data represent the largest genetic analysis to date of pathogenicB. cereusisolates with associated clinical parameters.


Medicina ◽  
2008 ◽  
Vol 44 (8) ◽  
pp. 593
Author(s):  
Žaneta Pavilonytė ◽  
Renata Kaukėnienė ◽  
Aleksandras Antuševas ◽  
Alvydas Pavilonis

Objective. To determine the prevalence of Staphylococcus aureus strains among hospitalized patients at the beginning of their hospitalization and during their treatment and the resistance of strains to antibiotics, and to evaluate epidemiologic characteristics of these strains. Patients and methods. Sixty-one patients treated at the Department of Cardiac, Thoracic and Vascular Surgery were examined. Identification of Staphylococcus aureus strains was performed using plasmacoagulase and DNase tests. The resistance of Staphylococcus aureus to antibiotics, b-lactamase production, phagotypes, and phagogroups were determined. The isolated Staphylococcus aureus strains were tested for resistance to methicillin by performing disc diffusion method using commercial discs (Oxoid) (methicillin 5 mg per disk and oxacillin 1 mg per disk). Results. A total of 297 Staphylococcus aureus strains were isolated. On the first day of hospitalization, the prevalence rate of Staphylococcus aureus strains among patients was 67.3%, and it statistically significantly increased to 91.8% on days 7–10 of hospitalization (P<0.05). During hospitalization, patients were colonized with Staphylococcus aureus strains resistant to cephalothin (17.6% of patients, P<0.05), cefazolin (14.6%, P<0.05), tetracycline (15.0%, P<0.05), gentamicin (37.7%, P<0.001), doxycycline (30.7%, P<0.001), and tobramycin (10.6%, P>0.05). Three patients (4.9%) were colonized with methicillin-resistant Staphylococcus aureus strains, belonging to phage group II phage type 3A and phage group III phage types 83A and 77; 22.6– 25.5% of Staphylococcus aureus strains were nontypable. During hospitalization, the prevalence rate of phage group II Staphylococcus aureus strains decreased from 39.6% to 5.7% (P<0.05) and the prevalence rate of phage group III Staphylococcus aureus strains increased to 29.5% (P<0.001). Conclusions. Although our understanding of Staphylococcus aureus is increasing, well-designed communitybased studies with adequate risk factor analysis are required to elucidate further the epidemiology of Staphylococcus aureus and methicillin-resistant Staphylococcus aureus. Surveillance of methicillin-resistant Staphylococcus aureus provides relevant information on the extent of the methicillin-resistant Staphylococcus aureus epidemic, identifies priorities for infection control and the need for adjustments in antimicrobial drug policy, and guides intervention programs.


2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Hannah Braungardt ◽  
Vineet K. Singh

Staphylococcus aureusis a well-known human pathogen with the ability to cause mild superficial skin infections to serious deep-tissue infections, such as osteomyelitis, pneumonia, and infective endocarditis. A key toS. aureusinfections and its pathogenicity is its ability to survive in adverse environments, especially at lower temperatures, by regulation of its cell membrane. Branched-chain fatty acids (BCFAs) and staphyloxanthin have been shown to regulate membrane fluidity and staphylococcal virulence. This study was conducted with the hypothesis that the simultaneous lack of BCFAs and staphyloxanthin will have a far greater implication on environmental survival and virulence ofS. aureus. Lack of a functional branched-chainα-keto acid dehydrogenase (BKD) enzyme because of a mutation in thelpdAgene led to a decrease in the production of BCFAs, membrane fluidity, slower growth, and poorin vivosurvival ofS. aureus. A mutation in thecrtMgene eliminated the production of staphyloxanthin but it did not affect membrane BCFA levels, fluidity, growth, orin vivosurvival. AcrtM:lpdAdouble mutant showed much slower growth and attenuation compared to individual mutants. The results of this study suggest that simultaneous targeting of the BCFA and staphyloxanthin biosynthetic pathways can be a strategy to controlS. aureusinfections.


Antibiotics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 694
Author(s):  
Solomon Abrha ◽  
Andrew Bartholomaeus ◽  
Wubshet Tesfaye ◽  
Jackson Thomas

Impetigo (school sores), a superficial skin infection commonly seen in children, is caused by the gram-positive bacteria Staphylococcus aureus and/or Streptococcus pyogenes. Antibiotic treatments, often topical, are used as the first-line therapy for impetigo. The efficacy of potential new antimicrobial compounds is first tested in in vitro studies and, if effective, followed by in vivo studies using animal models and/or humans. Animal models are critical means for investigating potential therapeutics and characterizing their safety profile prior to human trials. Although several reviews of animal models for skin infections have been published, there is a lack of a comprehensive review of animal models simulating impetigo for the selection of therapeutic drug candidates. This review critically examines the existing animal models for impetigo and their feasibility for testing the in vivo efficacy of topical treatments for impetigo and other superficial bacterial skin infections.


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