10 research outputs found
Timely effective antibiotic therapy and procedures for infectious source control significantly improved outcome.
<p>Administration of an effective antibiotic on the same day as the positive culture was taken significantly reduced all-cause mortality (p<0.001), as did undergoing a procedure for infectious source control (p<0.001).</p
Association between patient characteristics and outcome for 270 patients with <i>S. aureus</i> infection.
<p>Data are number (%) unless otherwise stated.</p>*<p><sup>1</sup>p value for the comparison between all-cause deaths and survivors.</p>*<p><sup>2</sup>Denominator for occupation is number of patients over the age of 16 years which is given in each square.</p>*<p><sup>3</sup>Past medical history of any underlying chronic medical conditions reported by the patient/relative or recorded in the medical notes.</p>*<p><sup>4</sup>Immunosuppression from HIV (5 untreated, 3 on anti-retroviral therapy), chemotherapy (nβ=β3), untreated leukaemia (nβ=β1), radiotherapy (nβ=β1) or immunosuppressive medication including prednisolone more than 30 mg/day for more than 1 week (nβ=β17).</p>*<p><sup>5</sup>Renal disease included end stage renal failure on long-term dialysis (nβ=β3; 2 on haemodialysis, 1 on peritoneal dialysis) and chronic renal failure (not on dialysis) due to diabetes mellitus (nβ=β14), systemic lupus erythematosus (nβ=β1), multiple myeloma (nβ=β1), glomerulonephritis (nβ=β1) or an unknown aetiology (nβ=β5).</p>*<p><sup>6</sup>Cardiac disease comprised congenital heart disease (nβ=β4), valvular heart disease including rheumatic heart disease (nβ=β8), ischaemic heart disease (nβ=β8), or arrhythmias including heart block requiring pacemaker (nβ=β4).</p>*<p><sup>7</sup>Lung disease comprised previously treated tuberculosis (nβ=β9), previous empyema (nβ=β1), lung cancer (nβ=β2), long-term tracheostomy (nβ=β1), chronic obstructive pulmonary disease (nβ=β2) or asthma (nβ=β1).</p
The range of sites of infection in patients and outcome associated with each clinical presentation.
*<p><sup>1</sup>p value for the comparison between all-cause deaths and survivors.</p>*<p><sup>2</sup>Site of deep abscesses were muscle (nβ=β20), retroperitoneal space (nβ=β7), parotid gland (nβ=β7), liver (nβ=β3), lung (nβ=β2), epidural space (nβ=β2), eye (nβ=β2), oropharynx (nβ=β2) and spleen (nβ=β1).</p>*<p><sup>3</sup>Other skin and soft tissue infections includes: necrotising fasciitis (nβ=β9), bedsore(s) (nβ=β6), pustules and carbuncles (nβ=β5), infected wound from trauma (nβ=β3), infected wound from tophi (nβ=β2), gangrene (nβ=β2), cellulitis (without other skin or soft tissue lesion) (nβ=β2) and infection of exfoliated skin following a severe drug reaction (nβ=β2).</p>*<p><sup>4</sup>Orthopaedic material includes: internal fixation metalwork (nβ=β8) and a hip replacement (nβ=β1).</p>*<p><sup>5</sup>Intravenous devices were peripheral cannulas (nβ=β4), central catheters (nβ=β3) and an umbilical catheter (nβ=β1).</p>*<p><sup>6</sup>Endocarditis from transthoracic echocardiographic evidence of vegetations (nβ=β7); 1 case clinically but died prior to echocardiogram.</p>*<p><sup>7</sup>Other infections include: urinary tract infection (nβ=β3), tenosynovitis (nβ=β2), Lemierre's syndrome (nβ=β1) and corneal ulcer (nβ=β1).</p>*<p><sup>8</sup>Post-operative infections include: mediastinitis (nβ=β4; 3 following mitral valve replacement and 1 after coronary artery bypass graft), meningitis from infected bone flap surgical wound (nβ=β1) and abdominal wound (nβ=β1).</p
Higher all-cause mortality associated with methicillin-resistant <i>S. aureus</i> (MRSA) but not with Panton-Valentine Leukocidin (PVL).
<p>Patients infected by MRSA had a greater all-cause mortality compared with patients infected by methicillin-susceptible <i>S. aureus</i> (MSSA) (p<0.001). Conversely, patients infected by PVL gene-positive <i>S. aureus</i> had a lower all-cause mortality compared with patients infected by PVL gene-negative <i>S. aureus</i> (p<0.001), an association that remained after adjustment for MRSA (pβ=β0.001).</p
Significant risk factors for mortality from <i>S. aureus</i> infection from multiple logistic regression analysis.
*<p><sup>1</sup>95% confidence intervals.</p>*<p><sup>2</sup>p value from Likelihood ratio test.</p
Detection of purified CPS by antigen-capture ELISA.
<p>mAb 3C5 was used in the capture phase of the ELISA at the concentrations listed. Following a wash and blocking step, purified CPS was serially diluted across the microtiter plate at the concentrations listed. The wells were then washed and HRP-labeled mAb 3C5 was used in the indicator phase to detect captured CPS. The ELISA was performed in triplicate and mean values are plotted.</p
Prototype Active Melioidosis Detect (AMD) LFI.
<p>(A) Schematic of LFI components. (B) <i>B. pseudomallei</i> strain Bp82 colony grown on an agar plate was picked and suspended in 2 drops of lysis buffer. The lysate was added to the sample pad followed by three drops of LFI chase buffer (top LFI). The LFI was imaged following a 15 min run time. The same test condition were used with a colony of <i>E. coli</i> (bottom LFI).</p
Calculation of mAb 3C5 affinity for CPS.
<p>A BIAcore X100 instrument was used to determine the affinity of mAb 3C5 for CPS. Biotinylated CPS was immobilized on the surface of a streptavidin sensor chip. Samples (two-fold serial dilution of mAb 3C5 [333β5.2 nM]) were injected over the sensor surface for 60 s, after which the mAb was allowed to passively dissociate for 120 s (left panel). The dissociation constant (K<sub>D</sub>) was determined using the steady-state model in BIAevaluation software (right panel).</p
Active Melioidosis Detect analytical reactivity and specificity.
<p>*Indicates strains that were tested for reactivity against mAb 3C5 via western blot.</p
Prototype AMD LFI for detection of <i>B. pseudomallei</i> CPS in melioidosis patient samples.
<p>(A) Preliminary testing of a variety of archived patient samples from Australia and Thailand. (B) Detection of CPS in melioidosis patient urine samples (filtered) listed in <a href="http://www.plosntds.org/article/info:doi/10.1371/journal.pntd.0002727#pntd-0002727-t002" target="_blank">Table 2</a>. Urine (50 Β΅l) was combined with 100 Β΅l of chase buffer and applied to the sample pad. Note that samples that were positive by antigen-capture immunoassay (<a href="http://www.plosntds.org/article/info:doi/10.1371/journal.pntd.0002727#pntd-0002727-t002" target="_blank">Table 2</a>) were also positive by LFI and the levels of CPS detected between both assays are congruent.</p