A new point-of-care test for the rapid antimicrobial susceptibility assessment of uropathogens.

Bacterial resistance to antimicrobials is considered a major issue worldwide. This condition may account for treatment failure of urinary tract infections, which are among the most common infections both in community and healthcare settings. Therapy against uropathogens is generally administered empirically, possibly leading to unsuccessful therapy, recurrence and development of antibiotic resistance. The reduction in analytical time to obtain antimicrobial susceptibility test (AST) results could play a key role in reducing the cost of healthcare, providing information about antibiotic efficacy and thus preventing from either exploiting new and expensive antibiotics unnecessarily or using obsolete and ineffective ones. A more rational choice among treatment options would hence lead to more effective treatment and faster resolution. In this paper we evaluated the performance of a new Point Of Care Test (POCT) for the rapid prediction of antimicrobial susceptibility in urine samples performed without the need of a laboratory or specialized technicians. 349 patients were enrolled in two open-label, monocentric, non-interventional clinical trials in partnership with an Emergency Medicine ward and the Day Hospital of two large healthcare facilities in Rome. Antibiogram was carried out on 97 patients. Results from analysis of urine samples with the POCT were compared with those from routine AST performed on culture-positive samples, displaying high accuracy (>90%) for all tested antimicrobial drugs and yielding reliable results in less than 12 hours from urine collection thus reducing analytical and management costs.

A new point-of-care test for the rapid detection of urinary tract infections.

Urinary tract infections (UTIs) are among the most common infections in all age groups. Fast and accurate diagnosis is essential to ensure a timely and effective therapy. Alongside with reference culture-based methods, several point-of-care tests (POCTs) for early detection of UTIs have been developed, but they have not been significantly implemented in current clinical practice. The Micro Biological Survey (MBS) POCT is a simple test developed by MBS Diagnostics Ltd. (London, UK) for the detection and management of UTIs. The present study has been undertaken to investigate the potentials and limits of the MBS POCT. A total of 349 patients were enrolled in two open-label, monocentric, non-interventional clinical trials in collaboration with an Emergency Medicine department and the outpatient clinic of two hospitals in Rome. Results of urine analysis using the MBS POCT were compared with those of the routine culture-based tests for UTI diagnosis performed by the hospital laboratory. The MBS POCT provided fast results revealing high bacterial count UTIs (≥ 105 CFU/ml) with 97% accuracy, 92% sensitivity, 100% specificity, 99% PPV, and 96% NPV within a 5-h analytical time threshold.

The use of discharge haemoglobin and NT-proBNP to improve short and long-term outcome prediction in patients with acute heart failure.

AIMS: To examine the prognostic value of admission (A) and discharge (D) haemoglobin (Hb) and its relationship with N-terminal pro-hormone B-type natriuretic peptide (NT-proBNP) in patients hospitalised for acute heart failure (AHF). The outcomes of interests were rehospitalisation or death after one, six or twelve months after discharge. METHODS: 317 hospitalised AHF patients (74.7±9.4 years) were enrolled in two academic centres in Belgrade and Rome. Laboratory analyses, including NT-proBNP were assessed at admission, and Hb also at discharge. Patients were divided into two groups according to the presence of anaemia. Follow-up contact was made by telephone. Statistical analyses were performed using SPSS software version 21.0. RESULTS: According to A and DHb levels (<120 g/l for women and <130 g/l for men), anaemia was present in 55% and 62% of patients, respectively ( P=0.497). Lower DHb was associated with the rehospitalisation risk after one (OR=0.96, P=0.004), six (OR=0.97, P<0.001) and 12 months (OR=0.97, P<0.001). For every g/l decrease of DHb, the risk of rehospitalisation after one year was increased by 3.3%. In the first six months, DHb contributed to increased risk of death (OR=0.97, P=0.005), but NT-proBNP showed greater power (OR=2.1, P<0.001). CONCLUSIONS: In AHF patients discharge anaemia is a strong predictor for short and long-term rehospitalisation, while NT-proBNP seems to be a better predictor for mortality. Discharge Hb and NT-proBNP should be assessed together in order to detect the patients with higher risk of future death and rehospitalisation.

Diagnostic and prognostic utilities of multimarkers approach using procalcitonin, B-type natriuretic peptide, and neutrophil gelatinase-associated lipocalin in critically ill patients with suspected sepsis.

BACKGROUND: We investigated the diagnostic and prognostic utilities of procalcitonin (PCT), B-type natriuretic peptide (BNP), and neutrophil gelatinase-associated lipocalin (NGAL) in critically ill patients with suspected sepsis, for whom sepsis was diagnosed clinically or based on PCT concentrations. METHODS: PCT, BNP, and NGAL concentrations were measured in 340 patients and were followed up in 109 patients. All studied biomarkers were analyzed according to the diagnosis, severity, and clinical outcomes of sepsis. RESULTS: Clinical sepsis and PCT-based sepsis showed poor agreement (kappa = 0.2475). BNP and NGAL showed significant differences between the two groups of PCT-based sepsis (P = 0.0001 and P < 0.0001), although there was no difference between the two groups of clinical sepsis. BNP and NGAL were significantly different according to the PCT staging and sepsis-related organ failure assessment subscores (P < 0.0001, all). BNP and PCT concentrations were significantly higher in the non-survivors than in the survivors (P = 0.0002) and showed an equal ability to predict in-hospital mortality (P = 0.0001). In the survivors, the follow-up NGAL and PCT concentrations were significantly lower than the initial values (148.7 ng/mL vs. 214.5 ng/mL, P < 0.0001; 0.61 ng/mL vs. 5.56 ng/mL, P = 0.0012). CONCLUSIONS: PCT-based sepsis diagnosis seems to be more reliable and discriminating than clinical sepsis diagnosis. Multimarker approach using PCT, BNP, and NGAL would be useful for the diagnosis, staging, and prognosis prediction in the critically ill patients with suspected sepsis.