Breeding effects on durum wheat traits detected using GWAS and haplotype block analysis

Introduction

The recent boosting of genomic data in durum wheat (Triticum turgidum subsp. durum) offers the opportunity to better understand the effects of breeding on the genetic structures that regulate the expression of traits of agronomic interest. Furthermore, the identification of DNA markers useful for marker-assisted selection could also improve the reliability of technical protocols used for variety protection and registration.

Methods

Within this motivation context, 123 durum wheat accessions, classified into three groups: landraces (LR), ancient (OC) and modern cultivars (MC), were evaluated in two locations, for 34 agronomic traits, including UPOV descriptors, to assess the impact of changes that occurred during modern breeding.

Results

The association mapping analysis, performed with 4,241 SNP markers and six multi-locus-GWAS models, revealed 28 reliable Quantitative Trait Nucleotides (QTNs) related to plant morphology and kernel-related traits. Some important genes controlling flowering time and plant height were in linkage disequilibrium (LD) decay with QTNs identified in this study. A strong association for yellow berry was found on chromosome 6A (Q.Yb-6A) in a region containing the nadh-ubiquinone oxidoreductase subunit, a gene involved in starch metabolism. The Q.Kcp-2A harbored the PPO locus, with the associated marker (Ku_c13700_1196) in LD decay with Ppo-A1 and Ppo-A2. Interestingly, the Q.FGSGls-2B.1, identified by RAC875_c34512_685 for flag leaf glaucosity, mapped less than 1 Mb from the Epistatic inhibitors of glaucousness (Iw1), thus representing a good candidate for supporting the morphological DUS traits also with molecular markers. LD haplotype block approach revealed a higher diversity, richness and length of haploblocks in MC than OC and LR (580 in LR, 585 in OC and 612 in MC), suggesting a possible effect exerted by breeding programs on genomic regions associated with the agronomic traits.

Discussion

Our findings pave new ways to support the phenotypic characterization necessary for variety registration by using a panel of cost-effectiveness SNP markers associated also to the UPOV descriptors. Moreover, the panel of associated SNPs might represent a reservoir of favourable alleles to use in durum wheat breeding and genetics.

Not all plant-based diets are associated with benefits on mortality: the Moli-sani Study

Background

Vegetarians diets are characterized by the absence of some animal foods (e.g. red and processed meats), and a high consumption of plant-based foods. However, plant-based foods can include foods with varying nutritional value and health effects. We examined the association of three different pro-vegetarian (PVG) food patterns defined as general (gPVG), healthful (hPVG) and unhealthful (uPVG), with the risk of all-cause and cardiovascular disease (CVD) mortality in Italians.

Methods

Longitudinal analysis on 22,912 men and women (mean age 55±12 y) from the Moli-sani Study (2005-2010) followed up for 11.2 y (median). Food intake was assessed by a 188-item FFQ. A provegetarian food pattern (FP) was constructed by assigning positive scores to plant foods and reverse scores to animal foods. A healthful and an unhealthful pro-vegetarian FP, which distinguished between healthy (e.g. fruits, vegetables, legumes) and less-healthy plant foods (e.g. fruit juices, potatoes, sugary beverages), were also built up.

Results

In multivariable-adjusted analyses controlled for known risk factors, higher adherence to a gPVG was associated with lower all-cause (HR = 0.83; 95%CI 0.73-0.94) but not CVD mortality (HR = 0.90; 0.72-1.12). Increasing adherence to a hPVG was associated with reduced all-cause mortality risk (HR = 0.82; 0.72-0.95) as well as lower risk of CVD mortality (HR = 0.75; 0.59-0.95). Finally, the uPVG was directly associated with both all-cause (HR = 1.17; 1.03-1.33) and CVD mortality risks (HR = 1.23; 0.99-1.53).

Conclusions

A general pro-vegetarian food pattern was associated with longer survival in Italians. Preferring healthful vegetarian foods provided protection against CVD mortality too. Consistently, a large dietary share of unhealthful vegetarian foods, mostly highly processed, was associated with increased risk mortality. Thus the quality of the plant food consumed is paramount to achieve diet-related benefits on mortality.

Key messages

• A pro-vegetarian food pattern was associated with longer survival but preferring healthful vegetarian foods provided protection against CVD mortality too.

• The quality of the plant food consumed is paramount to achieve diet-related benefits on mortality.

Ultra-processed food consumption and survival in older Italians from the Moli-sani Study

Background

Ultra-processed food (UPF) is a major public health concern being reportedly associated with increased risk of non-communicable diseases and lower survival. However, most of the epidemiological evidence has been almost exclusively provided by research conducted in populations of youths or middle-aged adults. We tested the hypothesis that a large dietary share of UPF could be a risk factor also for vulnerable groups, as older adults (≥65 years).

Methods

Longitudinal analysis on 5,215 men and women (mean age 72±5 y) from the Moli-sani Study (2005-2010, Italy) followed up for 10.9 y (median). Food intake was assessed by a 188-item FFQ. UPF was defined using the NOVA classification according to degree of processing, and categorized as quartiles of the ratio (%) between UPF (g/d) and total food consumed (g/d; weight ratio). The overall nutritional quality of the diet was measured by the Food Standard Agency nutrient profiling system dietary index (FSAm-NPS DI).

Results

UPF contributed to 8% (min-max 0.0-58.4%) of the total food eaten daily and represented 14.4% (0.0-70.0%) of daily energy intake. In multivariable-adjusted analyses controlled for known risk factors, higher intake of UPF (Q4, ≥10.2% of total food), as opposed to the lowest (Q1, UPF<4.3%), was associated with increased all-cause mortality (Hazard ratio [HR]=1.19; 95%CI 1.03-1.39); these results remained unchanged after adjustment for the FSAm-NPS DI (HR = 1.21; 95%CI, 1.04-1.41). A linear dose-response relationship of 1% increment in UPF intake with all-cause mortality was also observed (p = 0.017; p for non-linearity=0.85).

Conclusions

A large dietary share of UPF was associated with lower survival in older Italians consuming relatively low amounts of these foods. Expanding on previous studies on different age groups, these findings provide further justification to advise people to limit consumption of UPF even at older age.

Key messages

• A large dietary share of ultra-processed food was associated with lower survival in older Italians consuming relatively low amounts of these foods.

• These findings provide further justification to advise people to limit consumption of ultra-processed food even at older age.

V-015 ROBOTIC TARUP: TECHNICAL DETAILS AND INNOVATIVE METHOD OF FIXATION

Aim

With the recent evolution of minimally invasive hernia repairing techniques, robotic platform has exponentially gained consensus in the field of abdominal wall surgery, leading to the placement of retromuscolar synthetic meshes avoiding the need of extensive tissue dissection as the open approach.

Our aim was to describe the introduction of Robotic Transabdominal Retromuscular Umbilical Prosthetic Hernia Repair (TARUP) at a referral centre for advanced mini-invasive surgery, by reporting the preliminary experience and the technical aspects of the procedure.

Material & Methods

We present a case of a 3 cm umbilical defect associated to supraumbilical diastasis in a young man undergoing TARUP with the Da Vinci Xi system. The robotic boom was placed on the patient's right side, with three trocars on the anterior axillary line. The outline for the mesh was marked by centering the hernia defect with transcutaneous needles to delineate the extent of dissection corresponding to mesh area. Intra-abdominal pressure was of 8–12 mmHg. A retromuscolar plane was created starting from the incision of the ipsilateral posterior rectus sheat. The hernia content was reduced. The junction between the anterior and posterior rectus fascia was incised to cross-over the linea alba and continue the dissection controlaterally. A 15×15 cm polypropylene mesh was positioned in the retrorectus space and fixed with cyanoacrylic glue tack.

Results

Intervention lenght was of 100 minutes. No intra- or post-operative complications occurred.

At present, no early recurrences were observed.

Conclusions

Robotic TARUP represents a safe and reproducible alternative in selected cases where retromuscolar mesh is preferred.

V-016 PARAHIATAL HERNIA: A RARE CASE OF DIAPHRAGMATIC HERNIA ROBOTICALLY REPAIRED

Aim

Parahiatal hernia is a rare type of diaphragmatic hernia, consisting in a adjacent but separated defect, lateral to the oesophageal hiatus and crus. It's not so familiar for surgeons, preoperative diagnosis is unlikely to be confirmed, and it is mostly found incidentally during intervention, leading to a complex and difficult repair.

We present a case of parahiatal hernia robotically treated with the aim of emphasizing how robotic system can successfully help surgeons in performing even unexpected confusing and challenging anatomic dissections and procedures.

Material and Methods

A 65-year-old woman underwent robotic parahiatal hernia repair at our Institution. Four robotic trocars were positioned along the transverse umbilical line with the additional Air-seal port at the periumbilical left side for assistant's use.

Dissection and isolation of both parahiatal defect and crural musculature were performed; the defect was closed with not absorbable barbed suture, conventional iatoplasty was also performed and a biosynthetic mesh was placed and fixed as a reinforcement.

Results

The duration of the intervention was of 100 minutes. No. intr- or post-operative complications occurred. Blood loss were inferior than 100 millilitres. The patient started oral intake at the second post-operative day and after discharged.

At six months no recurrences were detected.

Conclusions

Parahiatal hernia are rare entities of which surgeons should be aware. Robotic treatment is safe and feasible and it represents a good tool for a successful management.

V-023 R-TAPP AS A TRAINING MODEL IN ROBOTIC SURGERY

Aim

The main aim of the project will be evaluating the effectiveness of an experimental structured didactic program in robotic surgery in filling the training gap caused by the pandemic. We intend to evaluate how establishing a training pathway could improve young surgeons’ robotic skills and implement their participation in robotic procedures during the COVID-19 pandemic. We will also evaluate the learning curve of robotic transabdominal preperitoneal inguinal hernia repair (TAPP) for young surgeons with limited experience as first operators at the dual console.

Matherials and Methods

We designed an experimental stepwise training program in robotic surgery that starts from a first step of theoretical and laboratory lessons, followed by a second phase of bedside assistance training, and finally the completion of low complexity procedures by the trainees proctored at the dual console by senior surgeons. Robotic TAPP was selected as training model. The performance of each trainee will be registered in an evaluation data sheet and Learning scores will be recorded by the tutor with the evaluation of 6 corner steps of the procedure.

Results

Preliminary results showed improved technical skills and increased team spirit and wellbeing.

Conclusions

TAPP is a good training model because involves technical steps useful for more complex procedures. The robotic dual console represent an extraordinary training tool and a structured training program positively impacts technical skills and could help filling the training gap caused by the pandemic.

616 Addressing Challenges to Enable Better Use of Routinely Collected Clinical Photographs: Evaluating the Largest Cleft Dataset for Machine Learning Analysis

Aim

Orofacial clefts are the most common congenital anomaly to affect the craniofacial region. Surgical repair is usually performed in infancy; however, there are concerning inequalities in access to and quality of surgical care. Scoring aesthetic results after surgery is crucial when determining the success of a repair. A reliable and accurate scoring system utilising large numbers of unstandardised 2-dimentional (2D) photographs of ethnically diverse patients, which is inexpensive, widely accepted and easily applicable, does not exist. Artificial Intelligence (AI) has been applied in various surgical specialities with beneficial results; however, its advantages have not yet been harnessed in cleft care.

We aimed to evaluate the potential use of routinely collected 2D photographs of patients with an orofacial cleft and determine if non-standardised data could be used for machine learning (ML) analysis in cleft research.

Method

A database comprising over 5 million photographs, collected over 20 years, and developed by the international non-governmental organisation Smile Train, was described, and analysed using RStudio and Microsoft Excel.

Results

Description and analysis of the dataset demonstrated that it is the largest and most ethnically inclusive and diverse dataset that currently exists. Preliminary AI analysis confirmed that ML could be used to analyse the data.

Conclusion

The quality of routinely collected data presents challenges for use in research. Addressing such challenges helps ensure that findings are more representative of global burden of disease and will deliver outcomes that are more relevant to a diverse global population. Evidence based minimum standards to optimise future data collection have been identified.

O-222 Surveillance of scientific research integrity in medically assisted reproduction: a systematic review of the retracted literature

Study question

How many retracted papers are there in the medically assisted reproduction (MAR) literature and, more importantly, what are their particulars?

Summary answer

Article retraction within MAR literature is increasing and the most common reasons for retraction are errors in data and duplicate publications.

What is known already

Article retraction accounts for one of the most serious consequences of research misconduct. Articles may be subject to retraction whenever the findings are found to be unreliable, redundant, plagiarised or the authors are found to have performed unethical research or hidden

Trial registration number

N/A

P-774 Risks management in a donor program: application of Failure Mode and Effect Analysis from gamete matching to gamete thawing

Study question

Is failure mode and effects analysis (FMEA) a useful and effective method of risk assessment in a gamete donor program?

Summary answer

The analysis of the potential failures, their causes and effects significantly improved the safety strategies previously adopted in our gamete donor program.

What is known already

At present, in Italy, the donation of fresh gametes is possible, but almost unmanageable due to the lack of donors and the refund to donors forbidden by law. As a result, many IVF Italian Centers established agreements with foreign gametes cryo-banks in order to meet the huge demand for donation treatments. The exchange of personal sensitive data and gametes between the sending and receiving centers represents a crucial aspect in a donor cycle. Each stage of this process, from gamete request to gamete thawing, is not error-free. FMEA represents a strategy to identify and mitigate potential failures before they occur.

Study design, size, duration

Fifty-eight oocyte and 4 sperm donation cycles were performed at our IVF facility from September 2019 to January 2021. Gametes came from a single Spanish cryo-bank. FMEA represents a proactive risk evaluation tool useful to identify real or potential failures and to develop actions to minimize risks. FMEA was conducted, in January 2021, by a team consisting of 2 gynaecologists, 3 embryologists and 2 quality managers and repeated 8 months later.

Participants/materials, setting, methods

Processes were analyzed to identify and score the potential failure modes using the risk priority number (RPN) scoring system. The calculation has been obtained by multiplying 3 factors: severity, occurrence and detectability scored from 1-5. After calculating the criticality of each failure mode, an action plan was prepared and then effectiveness of new process was monitored. Finally, FMEA was repeated and the improved RPN after the corrective actions was calculated.

Main results and the role of chance

In our gamete donation program, we mapped four phases: gamete request, donor-recipient matching, gamete delivery and gamete thawing. All the steps presented multiple failures and 11 different potential failure modes had been identified. Failure modes as the incorrect transcription of the recipient data, the acceptance of a donor proposal not well-matched with recipients and the receipt of gametes unsuitable for the couple correlate to high-risk scores with 30 RPN. These events may have severe consequences such as an incorrect matching between donor and recipient, and the subsequent birth of a child from a mismatched donor. Although gamete request, donor-recipient matching and receiving gametes phases are mainly characterized by document checking, the introduction of witnessing by another physician or embryologist, reduced the risk by 50%. Therefore, the introduction of double checking by a second operator represents an essential control measure to avoid errors.

Limitations, reasons for caution

This study is influenced by the general limitations of the FMEA approach, such as different personal experiences and skills of the participants since failures may be unrecognized, underestimated or overstated.

Wider implications of the findings

Performing a risk assessment in a donor program represents a valid strategy to mitigate risks of incorrect matching and loss of traceability. Since errors in data record and acceptance of donor proposal may cause important down streaming consequences, the double witnessing is strongly encouraged.

Trial registration number

NA

Clinical standards for the diagnosis, treatment and prevention of TB infection

BACKGROUND: Tuberculosis (TB) preventive therapy (TPT) decreases the risk of developing TB disease and its associated morbidity and mortality. The aim of these clinical standards is to guide the assessment, management of TB infection (TBI) and implementation of TPT.METHODS: A panel of global experts in the field of TB care was identified; 41 participated in a Delphi process. A 5-point Likert scale was used to score the initial standards. After rounds of revision, the document was approved with 100% agreement.RESULTS: Eight clinical standards were defined: Standard 1, all individuals belonging to at-risk groups for TB should undergo testing for TBI; Standard 2, all individual candidates for TPT (including caregivers of children) should undergo a counselling/health education session; Standard 3, testing for TBI: timing and test of choice should be optimised; Standard 4, TB disease should be excluded prior to initiation of TPT; Standard 5, all candidates for TPT should undergo a set of baseline examinations; Standard 6, all individuals initiating TPT should receive one of the recommended regimens; Standard 7, all individuals who have started TPT should be monitored; Standard 8, a TBI screening and testing register should be kept to inform the cascade of care.CONCLUSION: This is the first consensus-based set of Clinical Standards for TBI. This document guides clinicians, programme managers and public health officers in planning and implementing adequate measures to assess and manage TBI.

Moderate partially skimmed milk consumption is associated with reduced mortality risk

Background

Data on milk and other dairy products intake with health outcomes are inconsistent. We investigated the association of milk and total dairy consumption with the risk of all-cause and cause-specific mortality in a Mediterranean population.

Methods

We performed a longitudinal analysis on 22,889 men and women (mean age 55.4±11.7 y; 52.3% women), from the Moli-sani Study cohort (enrollment 2005-2010) followed-up for a median of 11 years. Dietary data were collected through a 188-item food frequency questionnaire. Total dairy consumption (g/d) was calculated as the sum of milk (whole and partially-skimmed, g/d), yogurt (whole and partially skimmed, g/d) and cheese (fresh and hard, g/d). Hazard ratio (HRs) with 95% confidence interval (CI) were calculated by multivariable Cox regression, modelled by spline curves.

Results

In multivariable-adjusted analysis controlled for sociodemographic, clinical and dietary factors, cheese, yogurt or whole milk intake were not associated with either all-cause or cause-specific mortality (p for overall association >0.38), as well as was total diary intake (p > 0.18). On the contrary, non-linear J-shaped curves were observed for the association of partially skimmed milk intake with all-cause and cancer mortality (p value for total and non-linear association=0.0072 and 0.035, and 0.097 and 0.049, respectively; magnitude of the relative reduction =16% and 18% at nadir of 128 and 114 g/d, respectively). A linear association between partially skimmed milk intake and CVD mortality was observed (p for association =0.047; p for non-linearity= 0.41), with HR = 0.82 (95%CI: 0.68-0.98) at 125 g/d and a window of statistically significant protection ranging from 100 to 250 g/d.

Conclusions

In a large Mediterranean population of adults, consumption of 1 standard cup of partially skimmed milk was associated with lower all-cause, cancer and CVD mortality. Other dairy sources were not associated with mortality.

Key messages

In a large Mediterranean population, total dairy intake did not predict mortality. Daily consumption of 1 standard cup of partially skimmed milk lowers the risk of all-cause, cardiovascular and cancer mortality.

Ultra-processed food consumption modifies the association of Nutri-Score with all-cause mortality

Background

The Nutri-Score front-of-pack label rates foods according to their nutritional quality while the NOVA classification is focused on degree of processing; both systems separately predicted mortality in epidemiological contexts. We evaluated whether ultra-processed food (UPF) modifies the association of the Nutri-Score with mortality.

Methods

Longitudinal analysis on 22,549 Italian men and women (mean age 54±12 y) from the Moli-sani Study (2005-2010) followed for 11.2 y. Food intake was assessed by a food frequency questionnaire. The Food Standards Agency nutrient profiling system (FSAm-NPS) score, used to derive the Nutri-Score, was calculated for each food based on its amount of energy, saturated fat, sugar, sodium, fibre, protein, fruits, vegetables, legumes and nuts per 100 g of product. The FSAm-NPS dietary index was calculated for each participant as an energy weighted mean of the FSAm-NPS score of all foods consumed, and increased values indicate lower nutritional quality. UPF intake was the proportion (%) of UPF in the total weight of food consumed (g/d) and categorized as low/high (below/above the population median, respectively).

Results

In a multivariable analysis, 1-SD increase in the FSAm-NPS index led to increased risk of all-cause (HR = 1.07; 95%CI 1.02-1.13) and CVD mortality (HR = 1.08; 1.00-1.18). UPF intake was an effect modifier since the association of FSAm-NPS index with mortality was confined to individuals with high UPF intake (HR = 1.14; 1.05-1.25) but not in those with low UPF (HR = 1.00; 0.93-1.07; p for interaction=0.034). Similar findings were reported for CVD mortality (HR = 1.14;0.99-1.31 and HR = 1.01;0.90-1.13 for high and low UPF consumers, respectively; p for interaction=0.18).

Conclusions

Higher mortality risk associated with a NutriScore revealing nutrient-poor food intake is limited to individuals also reporting high UPF intake. Food labelling systems should account for food processing in addition to nutritional content.

Key messages

Ultra-processed food modifies the association between the 5-color Nutri-Score front-of-pack label with all-cause mortality in an Italian general population. Food labelling systems, that are conceived to help consumers make healthier food choices, should also account for food processing in addition to nutritional content.

P–031 The effect of ejaculatory abstinence period on embryological and clinical outcomes in ICSI cycles: A retrospective analysis of 3,353 cycles

Study question

Does ejaculatory abstinence period in male affect embryological and pregnancy outcomes following fresh embryo transfers in ICSI cycles?

Summary answer

Shorter ejaculatory abstinence period is associated with lower triploid zygotes rate per ICSI cycle but it does not affect clinical outcomes after fresh embryo transfers.

What is known already

Lower sperm quality may negatively impact on fertilisation rate and embryo morphokinetic parameters after ICSI and the effect of the ejaculatory abstinence period before semen collection on seminal parameters and sperm quality has been widely reported. However, the impact of ejaculatory abstinence on clinical outcomes is still controversial. WHO (World Health Organization) guideline recommended that abstinence period should be 2–7 days. Even so, there are no larger prospective trials determining the optimal timing for ejaculatory abstinence period for infertile couples.

Study design, size, duration

This is a single center retrospective observational study of 3,353 fresh cycles from January 2017 to December 2020. Semen analysis was done according to the WHO criteria. Exclusion criteria for this study were frozen gametes and cycles with no retrieved oocytes. Primary outcomes were fertilization rate and triploid zygotes rate. Secondary outcomes were blastulation rate, ongoing pregnancy rate and live birth rate per fresh embryo transfer.

Participants/materials, setting, methods

The correlation between ejaculatory abstinence and continuous outcomes was evaluated by Spearman’s correlation analysis in order to detect potential non-linear associations. Generalized linear model and logistic regression were used, respectively for continuous and binary outcomes, in order to adjust for confounders such as female age, male age, number of retrieved oocytes, percentage of mature oocytes, infertility causes, seminal volume, sperm concentration and total progressive sperm motility. A p value <0.05 was considered significant.

Main results and the role of chance

The male mean age was 40.3±5.5 and mean duration of abstinence was 2.9±1.7 days. The mean age of female patients was 38.2±4.0. Higher ejaculatory abstinence period was associated with a higher sperm concentration (Spearman p = 3.1x10–6) but not with a higher total sperm progressive motility. Even so, no significant correlation with EA were observed when considering fertilization rate, blastulation rate, ongoing pregnancy and live birth rate per transfer in analyzed cycles. Triploid zygote rate was positively associated with a higher ejaculatory abstinence period. For the ejaculatory abstinence period of 1 day (n = 64), 2 days (n = 1523), 3 days (n = 1032), 4 days (n = 408), 5 days (n = 174), 6 days (n = 47) and ≥7 days (n = 105) the mean triploid rate was 2.4%, 2.4%, 2.5%, 4.1%, 3.6%, 5.4% and 4.3%, respectively (Spearman p = 9x10–3). Triploid zygote rate was independent of semen volume, concentration and total progressive motility.

Limitations, reasons for caution

This is a large observational study with a retrospective data collection. Despite our methodological approach, the presence of biases related to retrospective design can not be excluded and it may be a reason for caution.

Wider implications of the findings: Our results demonstrate that ejaculatory abstinence period do not affect blastulation, ongoing pregnancy and live birth rates. The current findings discourage an abstinence time longer than 3 days due to its association with a higher abnormal fertilization rate.

Trial registration number

Not applicable

Outcome of treatment of MDR-TB or drug-resistant patients treated with bedaquiline and delamanid: Results from a large global cohort

The World Health Organization (WHO) recommends countries introduce new anti-TB drugs in the treatment of multidrug-resistant tuberculosis. The aim of the study is to prospectively evaluate the effectiveness of bedaquiline (and/or delamanid)- containing regimens in a large cohort of consecutive TB patients treated globally. This observational, prospective study is based on data collected and provided by Global Tuberculosis Network (GTN) centres and analysed twice a year. All consecutive patients (including children/adolescents) treated with bedaquiline and/or delamanid were enrolled, and managed according to WHO and national guidelines. Overall, 52 centres from 29 countries/regions in all continents reported 883 patients as of January 31st 2021, 24/29 countries/regions providing data on 100% of their consecutive patients (10-80% in the remaining 5 countries). The drug-resistance pattern of the patients was severe (>30% with extensively drug-resistant -TB; median number of resistant drugs 5 (3-7) in the overall cohort and 6 (4-8) among patients with a final outcome). For the patients with a final outcome (477/883, 54.0%) the median (IQR) number of months of anti-TB treatment was 18 (13-23) (in days 553 (385-678)). The proportion of patients achieving sputum smear and culture conversion ranged from 93.4% and 92.8% respectively (whole cohort) to 89.3% and 88.8% respectively (patients with a final outcome), a median (IQR) time to sputum smear and culture conversion of 58 (30-90) days for the whole cohort and 60 (30-100) for patients with a final outcome and, respectively, of 55 (30-90) and 60 (30-90) days for culture conversion. Of 383 patients treated with bedaquiline but not delamanid, 284 (74.2%) achieved treatment success, while 25 (6.5%) died, 11 (2.9%) failed and 63 (16.5%) were lost to follow-up.

The role of pharmacogenetics for antithrombotic therapy management: new achievements and barriers yet to overcome

BACKGROUND

Pharmacogenetics investigates the response to pharmacological treatments based on individual genetic background. Actually, numerous pharmacogenetic tests help to predict the response to drugs used in different medical areas, contributing to the so-called personalized medicine.

OBJECTIVE

This review aims to update the available data on the genotype-guided treatment with both the anticoagulant and antiplatelet agents. Moreover, it shed light on the pitfalls still contrasting the implementation of cardiovascular pharmacogenetics.

METHODS

A review of the literature on the studies investigating the effects of the genotype-guided anticoagulant and antiplatelet treatment was performed.

RESULTS

Considering the large use of antithrombotic drugs, pharmacogenetics has particular importance in this field. Several polymorphisms influence the response to both anticoagulant and antiplatelet agents, and tests, based on their identification, are now available.

CONCLUSIONS

Recent randomized clinical trials demonstrated that pharmacogenetics might successfully contribute to optimizing the antiplatelet therapy also in patients particularly complicated to treat. However, despite accumulating evidence on the utility and feasibility of some pharmacogenetics tests, several barriers still contrast their implementation into clinical practice.

Lifestyle and Mediterranean diet adherence in a cohort of Southern Italian patients with Multiple Sclerosis

BACKGROUND/OBJECTIVES

Several studies supported the beneficial effects of the Mediterranean diet (MeDi) on chronic diseases. In Multiple Sclerosis (MS), the MeDi might interfere with systemic inflammatory state, gut microbiota, and comorbidities. The Med Diet Score (MDS) estimates the adherence to the MeDi and the cardiovascular (CV) risk. Aims of our study were i) to photograph lifestyle and diet habits of a southern Italy cohort of people with MS (pwMS), and ii) to investigate the impact of the MeDi on MS clinical outcomes.

SUBJECTS/METHODS

We conducted a multi-center, cross-sectional study, enrolling 435 consecutive consenting pwMS, attending the outpatient clinics for routine follow-up visits. Participants underwent a clinical examination and a 29-item self-administered questionnaire on life and dietary habits. Disease phenotype, Expanded Disability Status Scale (EDSS), MS Severity Score (MSSS), waist circumference (WC), Body Mass Index (BMI), therapies, and comorbidities, were updated. MDS was assessed and correlated with current and retrospective clinical data.

RESULTS

75.8% of respondents were interested in nutrition, 72.8% were non-smokers, 52.9% performed physical activity, and 45.6% used food supplements. MDS was higher in pwMS with normal WC (p = 0.031), and inversely correlated with MSSS (p = 0.013) and EDSS (p = 0.012) at survey time. MDS did not correlate with the total number of relapses (before and after diagnosis) (p = 0.372). Metabolic comorbidities were associated with an increased 10-year CV risk (r = 0.85, p = 0.002).

CONCLUSION

Our findings suggest a putative beneficial effect of the MeDi on WC, MS course and disability. Given the role of chronic systemic inflammation in maintenance of autoimmunity and secondary neurodegeneration, both involved in long-term disability, we may suppose a beneficial effect of the MeDi on MS long-term disability outcomes, probably mediated by a modulation of the gut microbiota and the low-grade chronic systemic inflammation.

In vitro activity of aztreonam/avibactam against a global collection of Klebsiella pneumoniae collected from defined culture sources in 2016 and 2017

OBJECTIVES

This study reports on the activity of aztreonam/avibactam (ATM-AVI) against a collection of Klebsiella pneumoniae collected in 2016 and 2017.

METHODS

Non-duplicate K. pneumoniae isolates were collected from four regions (Africa/Middle East, n = 785; Asia-Pacific, n = 1433; Europe, n = 4236; Latin America, n = 1499) and five culture sources (blood, n = 902; intra-abdominal, n = 992; urinary tract, n = 2148; skin and skin structure, n = 1409; lower respiratory tract, n = 2502). MICs were determined at a central laboratory using Clinical and Laboratory Standards Institute (CLSI) broth microdilution methodology. Susceptibility was determined using European Committee on Antimicrobial Susceptibility Testing (EUCAST) breakpoints.

RESULTS

For all culture sources, against all K. pneumoniae, the highest rates of susceptibility were seen for amikacin (>84%), ceftazidime/avibactam (>94%), colistin (>92%) and meropenem (>83%), and >99.9% of isolates were inhibited at an ATM-AVI MIC of ≤4 mg/L. Among meropenem-resistant (MEM-R, n = 583) and meropenem-resistant metallo-β-lactamase-negative (MEM-R-MBLN; n = 469) isolates, susceptibility was highest to ceftazidime/avibactam (79.9% and 99.4%, respectively) and colistin (67.2% and 62.7%, respectively). All MEM-R-MBLN isolates from blood, intra-abdominal, urinary tract and skin and skin structure sources, and all but one isolate from respiratory sources, were inhibited at an ATM-AVI MIC of ≤2 mg/L. Against the meropenem-resistant metallo-β-lactamase positive (MEM-R-MBLP; n = 114) isolates, susceptibility to colistin was between 75.0% (urinary tract isolates) and 93.3% (lower respiratory tract isolates). All MEM-R-MBLP isolates were inhibited at an ATM-AVI MIC of ≤0.5 mg/L.

CONCLUSIONS

ATM-AVI is active against K. pneumoniae isolates from a range of culture sources across Africa/Middle East, Asia-Pacific, Europe and Latin America. ATM-AVI also has activity against MEM-R-MBLN and MEM-R-MBLP isolates.

Pediatric urticaria in the Emergency Department: epidemiological characteristics and predictive factors for its persistence in children

Summary

Introduction. Acute urticaria (AU) in children is a common clinical manifestation responsible for admission to the emergency department (ED). We aimed to analyze the epidemiological characteristics of AU in children and to identify predictors of both severity and progression. Material and methods. We evaluated 314 children admitted to the ED with a diagnosis of AU. We analyzed information concerning its onset, duration, severity, possible triggering factors, and the persistence of symptoms after 1, 3, and 6 months. Results. The most common etiological factors were infections (43.9%); in up to 32.4% of cases, AU was considered as idiopathic. AU was significantly most common in males and pre-school children. At the 6-month follow-up, 9.5% of children presented a persistence of urticaria, mainly those with contact (44.4%) or idiopathic (30.4%) forms. Conclusions. The AU etiology identified by history in the ED may be a significant predictor of persistence after a first attack of AU.

Deep-sequencing of Solanum commersonii small RNA libraries reveals riboregulators involved in cold stress response

Among wild species used in potato breeding, Solanum commersonii displays the highest tolerance to low temperatures under both acclimated (ACC) and non-acclimated (NACC) conditions. It is also the first wild potato relative with a known whole genome sequence. Recent studies have shown that abiotic stresses induce changes in the expression of many small non-coding RNA (sncRNA). We determined the small non-coding RNA (sncRNAome) of two clones of S. commersonii contrasting in their cold response phenotypes via smRNAseq. Differential analysis provided evidence that expression of several miRNAs changed in response to cold stress conditions. Conserved miR408a and miR408b changed their expression under NACC conditions, whereas miR156 and miR169 were differentially expressed only under ACC conditions. We also report changes in tasiRNA and secondary siRNA expression under both stress conditions. Our results reveal possible roles of sncRNA in the regulatory networks associated with tolerance to low temperatures and provide useful information for a more strategic use of genomic resources in potato breeding.

P4543Steatosis in explanted heart of type 2 diabetic patients with end-stage heart failure: progression of intra-myocytes fat accumulation in non-diabetic heart implanted in diabetic patients

Background

How metabolic impairment leads to cardiac dysfunction in diabetics is unknown. A recent theory, derived mainly from rodent models, involves lipid over-storage to cardiomyocytes. Previous human study demonstrated cardiac steatosis on explanted hearts of diabetics with heart failure. However, this study did not provide any evidence about the effects of diabetes milieu on implanted non-diabetic heart.

Purpose

We evaluated intramyocyte lipid infiltration in explanted heart of type 2 diabetics with end-stage heart failure. Moreover, we studied the effects of diabetic milieu on myocyte lipid infiltration and cardiac function of non-diabetic implanted hearts in type 2 diabetics one year after heart transplantation (HTx).

Methods

We conducted a prospective study with a follow-up of 12 months on 88 patients over 18 years of age underwent first HTX. Patients with pre-HTx diabetes duration for at least 6 months were included in the study. Patients with endomyocardial biopsy (EMB) considered positive for rejection, according to International Society for Heart Lung Transplantation (ISHLT), and with post-HTx diabetes were excluded from the study. All patients underwent immunosuppression induction according ISHLT indications. All patients were followed applying internationally accepted patient evaluations (echocardiography and metabolic control) and EMB schedules. EBM from patients without rejection evidences were evaluated for intramyocyte lipid infiltration with oil red-O staining (Or-O).

Results

The patients were divided in diabetics (44%, age 51.6±7.2 y, diabetes duration 11±3 y) and no-diabetics (56%, 52.1±10.9 y). The patients were matched on the basis of eligibility for a HTx. Seven patients (3 diabetics and 4 no-diabetics) died in hospital. 5 (11%) patients developed post- HTx diabetes. No differences were seen in rejection (12% vs. 10%), infection (9% vs. 10%), renal dysfunction (9% vs. 8%) or mortality (7% vs. 8%). Therefore, the study population included 23 no-diabetics and 22 diabetics. After 1 year, we evidenced an impairment of both sx and dx ventricular function as showed by a significantly reduction of ejection fraction and TAPSE in diabetic patients (Figure-A). Although diastolic function not show significant differences among groups, the E/e' ratio showed lower reduction in diabetics. Or-O evidenced that 91% of diabetic and only 2 of no-diabetic explanted hearts (9%) showed intramyocyte lipid infiltration (Figure-B). Moreover, Or-O of EMB, for monitoring heart transplant during 1 year, evidenced a progressive intramyocyte lipid infiltration in 18 diabetics (81%), whereas none of no-diabetics showed intramyocyte lipid infiltration.

Conclusions

Our data show that almost all of the explanted diabetic hearts had intramyocyte lipid infiltration. More interesting, we observed that healthy heart transplanted in recipients with pretransplant diabetes were affected early by metabolic disorders leading to intramyocyte lipid infiltration.

Prejudices towards people with intellectual disabilities: reliability and validity of the Italian Modern and Classical Prejudices Scale

BACKGROUND

Prejudices and negative attitudes towards intellectual disabilities (IDs) may hinder social inclusion of ID individuals, limiting their well-being. This study investigated the psychometric characteristics of the Italian Modern and Classical Prejudices Scale (MCPS-IT) towards people with ID and the effects of gender, age and socio-economic status (SES) on prejudices.

METHOD

The MCPS-IT was administered to 474 adults (69% women, age range 18-70 years, M = 33.13) in conjunction with a questionnaire evaluating socio-demographic information (SES), the contact and the education about ID people and the social dominance orientation.

RESULTS

Results confirmed that Italian MCPS has a two-factor structure that measures in a reliable and valid way prejudice towards people with ID. Multivariate analyses of variance confirmed a weak gender difference in both scales and age differences in modern scale. No SES differences were found.

CONCLUSION

The Italian MCPS represents a valid scale that can be used to monitor the social context of people with ID.

Factors interfering with parenthood decision-making in an Italian sample of people with multiple sclerosis: an exploratory online survey

BACKGROUND

Little is known about the influence of multiple sclerosis (MS) diagnosis on parenthood attitude in people with MS (pwMS).

OBJECTIVE

To investigate the impact of diagnosis, clinical features and external disease-related influences on parenthood decision-making in Italian pwMS.

METHODS

A web-based survey was posted on SMsocialnetwork.com to investigate clinical status, parenthood desire, influences on family planning, pregnancy outcomes, abortions and adoptions of pwMS.

RESULTS

33/395 respondents never wanted to become parent because of MS ("anti-parenthood after diagnosis"). 362 declared to be in favor of parenthood. 51% pwMS having a child by the survey time had already received the MS diagnosis at first childbirth. The frequency of a second child in pwMS after diagnosis was 38% compared to 67% in people without yet MS diagnosis. 16% of pwMS were discouraged to become parent after diagnosis, mainly by medical personnel. In 71% of respondents, diagnosis did not delay the decision to become parent and only 39% were counseled by treating physician to plan pregnancy. Patients' distribution according to the clinical phenotype (exclusively relapsing vs exclusively progressive) showed a higher proportion of progressive patients in the "anti-parenthood after diagnosis" subgroup.

CONCLUSION

MS diagnosis impacted dramatically on the life project of 7% of pwMS that decided not to have children because of the disease and in pro-parenthood pwMS impacted especially on having the second child. Only a minority was counseled to plan pregnancy. A worse disease course driving to a progressive phenotype at survey time might have negatively impacted on parenthood desire.

Fake news, influencers and health-related professional participation on the Web: A pilot study on a social-network of people with Multiple Sclerosis

BACKGROUND

Over the last few decades, patients have increasingly been searching for health information on the Internet. This aspect of information seeking is important, especially for people affected by chronic pathologies and require lifelong treatment and management. These people are usually very well informed about the disease but are nonetheless vulnerable to hopes of being cured or saved, often amplified by misinformation, myths, legends, and therapies that are not always scientifically proven. Many studies suggest that some individuals prefer to rely on the Internet as their main source of information, often hindering the patient-doctor relationship. A professional approach is imperative to maintain confidentiality, honesty, and trust in the medical profession.

OBJECTIVE

we aimed to examine, in a medically supervised Italian web community (SMsocialnetwotk.com) dedicated to people with Multiple Sclerosis (pwMS), the posts shared by users and to verify the reliability of contents of posts shared by users pinpointed as Influencers through an online questionnaire.

METHODS

we grouped the posts published on SMsocialnetwork from April to June 2015 into those with medical content (scientifically correct or fake news), and those related to social interactions. Later, we gave a questionnaire to the community asking to identify the three users/Influencers providing the most reliable advice for everyday life with MS and the three users/Influencers providing the most useful information about MS treatments.

RESULTS

308 posts reported scientific and relevant medical information, whereas 72 posts included pieces of fake news. 1420 posts were of general interest. Four out of the 6 Influencers had written only posts with correct medical information (3 were pwMS, 1 was a Neurologist) and never any fake news. The remaining 2 appointed Influencers (2 pwMS) had written only posts about general interests.

CONCLUSION

the identification of fake news and their authors has shown that the latter are never appointed as Influencers. SMsocialnetwork.com acted as a "web safe environment" where the Influencers contributed by sharing only correct medical information and never fake news. We speculate that the presence of neurologists and psychologists supervising the information flow might have contributed to reduce the risk of fake news spreading and to avoid their acquisition of authoritative meaning.

Hexavalent vaccines: characteristics of available products and practical considerations from a panel of Italian experts

Combination vaccines represent a valuable technological innovation in the field of infectious disease prevention and public health, because of their great health and economic value from the individual, societal, and healthcare system perspectives. In order to increase parents' and healthcare professionals' confidence in the vaccination programs and maintain their benefits to society, more information about the benefits of innovative vaccination tools such as combination vaccines is needed. Purpose of this work is an examination of available hexavalent vaccines, that protect against Diphtheria, Tetanus, Pertussis, Poliomyelitis, Hepatitis B and Haemophilus influenzae type b infections. From the epidemiological updates of vaccine preventable diseases to the vaccine development cycle, from the immunogenicity of antigenic components to the safety and co-administration with other vaccines, several aspects of available hexavalent vaccines are discussed and deepened. Also a number of practical considerations on schedules, age of employment, strategies for vaccination recovery, vaccination in at-risk births are issued, based on the recommendations of Italian Ministry of Health, Italian Society of Pharmacology (SIF), Italian Society for Pediatrics (SIP), Italian Federation of Family Paediatricians (FIMP) and Italian Society of Hygiene, Preventive Medicine and Public Health (SItI).

Identifying neuropathic pain in patients with multiple sclerosis: a cross-sectional multicenter study using highly specific criteria

BACKGROUND

Pain is a common and heterogeneous complication of multiple sclerosis (MS). In this multicenter, cross sectional study, we aimed at investigating the prevalence of pain in MS using highly specific criteria for distinguishing the different types of pain.

MATERIALS AND METHODS

After a structured interview, in patients with pain, clinical examination and DN4 questionnaire were used for distinguishing neuropathic and nociceptive pain. In subjects with neuropathic pain, the Neuropathic Pain Symptom Inventory was used for differentiating neuropathic pain symptoms.

RESULTS

We enrolled 1249 participants (832 F, 417 M, mean age 33.9 years, mean disease duration 8 years, mean EDSS 3.2); based on clinical evaluation and DN4 score 429 patients (34.34%) were classified with pain (470 pain syndromes): 286 nociceptive pain syndromes and 184 neuropathic pain syndromes. Multivariate analysis showed that pain was associated with age, gender and disease severity and that neuropathic pain was distinctly associated with EDSS.

CONCLUSIONS

Our study, providing definite information on the prevalence, characteristics and variables associated with neuropathic pain due to MS, shows that a more severe disease course is associated with a higher risk of neuropathic pain. Our findings might, therefore, provide a basis for improving the clinical management of this common MS complication.

The skin prick test

The skin prick test (SPT) is the most common test for the diagnosis of allergy. SPT is performed by pricking the skin, usually in the volar surface of the forearm, with a lancet through a drop of an allergen extract and is usually the first choice test in the diagnostic workup for allergic diseases because of its reliability, safety, convenience and low cost. SPT is minimally invasive and has the advantage of testing multiple allergens in 15 to 20 min. In children, SPT is far less disturbing than venipuncture and is used to obtain a sample of serum to measure specific IgE through in vitro tests. There is a good correlation (about 85-95%) between SPT and in vitro tests. Globally, SPT is an excellent diagnostic tool, with a positive predictive value ranging from 95-100%. SPTs can identify sensitivity to inhalants, foods, some drugs, occupational allergens, hymenoptera venom and latex. However, the relevance of such sensitivity to allergens should always be carefully interpreted in the light of the clinical history, because sensitization and clinical allergy may not coincide. In regards to safety, though the reports of systemic reactions, and particularly anaphylaxis, are very rare, in vitro IgE tests should be preferred if previous severe reactions emerge from the patient’s clinical history.

Impact of nasopharyngeal microbiota on the development of respiratory tract diseases

Knowledge of whether and how respiratory microbiota composition can prime the immune system and provide colonisation resistance, limiting consecutive pathobiont overgrowth and infections, is essential to improving the prevention and therapy of respiratory disorders. Modulation of dysbiotic ecosystems or reconstitution of missing microbes might be a possible measure to reduce respiratory diseases. The aim of this review is to analyse the role of nasopharyngeal microbiota in the development of respiratory tract disease in paediatric-age subjects. PubMed was used to search for all studies published over the last 15 years using the following key words: "microbiota" or "microbioma" and "nasopharyngeal" or "respiratory" or "nasal" and "children" or "paediatric" or "infant". Analysis of the literature showed that respiratory microbiota can regulate health and disease development in the respiratory tract. Like the gut microbiota, the respiratory microbiota is established at birth, and early respiratory microbiota composition determines bacterial succession patterns and respiratory health in children. Protective and dangerous bacteria have been identified, and this can be considered the base for developing new approaches to diseases that respond poorly to traditional interventions. Reconstitution of missing microbes can be achieved by the administration of pre- and probiotics. Modulation of respiratory microbiota by favouring colonisation of the upper respiratory tract by beneficial commensals can interfere with the proliferation and activity of resident pathobionts and is a possible new measure to reduce the risk of disease. However, further studies are needed because a deeper understanding of these and related issues can be transferred to clinical practice.

Birmingham epidermolysis severity score and vitamin D status are associated with low BMD in children with epidermolysis bullosa

Bone status impairment represents a complication of generalized forms of epidermolysis bullosa (EB); however, the prevalence and the main determinants of this event in localized forms remain poorly defined. Birmingham epidermolysis bullosa severity (BEBS) score and 25-hydroxyvitamin D levels are strongly associated with low bone mass, suggesting that vitamin D may play a potential beneficial role in bone health. Further longitudinal studies are needed in order to confirm this hypothesis.

INTRODUCTION

Bone status impairment represents a complication of generalized forms of EB; thus, we aimed to estimate the prevalence of low bone mass, to examine mineralization differences in various EB subtypes and to identify the most important determinants of bone impairment in children with either generalized or localized EB.

METHODS

An observational study of 20 children (11 males; mean age ± standard deviation, 11.7 ± 3.9 years) with EB was performed. Clinical history, physical examination, laboratory studies, X-ray of the left hand and wrist for bone age, and dual energy X-ray absorptiometry scans of the lumbar spine were obtained. Areal bone mineral density (aBMD Z-scores) and bone mineral apparent density were related to the BEBS score.

RESULTS

Areal BMD Z-score (mean -1.82 ± 2.33, range, -7.6-1.7) was reduced (<-2 SD) in 8 patients (40%), whereas aBMD Z-score adjusted for bone age was low in 7 patients (35%). BEBS score and 25-hydroxyvitamin D serum levels were the most important elements associated with aBMD (P = 0.0001 and P = 0.016, respectively). A significant correlation between the aBMD Z-score and area of skin damage, insulin-like growth factor-1, C-reactive protein, and sodium serum levels was also found.

CONCLUSIONS

Low aBMD can be considered a systemic complication of EB, primarily associated with BEBS score and 25-hydroxyvitamin D levels. Therefore, longitudinal evaluation of bone status is ongoing in these patients to define whether vitamin D supplementation would prevent, or at least reduce, bone status impairment.

Current and future trends in antibiotic therapy of acute bacterial skin and skin-structure infections

In 2013 the US Food and Drug Administration (FDA) issued recommendations and guidance on developing drugs for treatment of skin infection using a new definition of acute bacterial skin and skin-structure infection (ABSSSI). The new classification includes cellulitis, erysipelas, major skin abscesses and wound infection with a considerable extension of skin involvement, clearly referring to a severe subset of skin infections. The main goal of the FDA was to better identify specific infections where the advantages of a new antibiotic could be precisely estimated through quantifiable parameters, such as improvement of the lesion size and of systemic signs of infection. Before the spread and diffusion of methicillin-resistant Staphylococcus aureus (MRSA) in skin infections, antibiotic therapy was relatively straightforward. Using an empiric approach, a β-lactam was the preferred therapy and cultures from patients were rarely obtained. With the emergence of MRSA in the community setting, initial ABSSSI management has been changed and readdressed. Dalbavancin, oritavancin and tedizolid are new drugs, approved or in development for ABSSSI treatment, that also proved to be efficient against MRSA. Dalbavancin and oritavancin have a long half-life and can be dosed less frequently. This in turn makes it possible to treat patients with ABSSSI in an outpatient setting, avoiding hospitalization or potentially allowing earlier discharge, without compromising efficacy. In conclusion, characteristics of long-acting antibiotics could represent an opportunity for the management of ABSSSI and could profoundly modify the management of these infections by reducing or in some cases eliminating both costs and risks of hospitalization.

Recommendations for the diagnosis of pediatric tuberculosis

Tuberculosis (TB) is still the world's second most frequent cause of death due to infectious diseases after HIV infection, and this has aroused greater interest in identifying and managing exposed subjects, whether they are simply infected or have developed one of the clinical variants of the disease. Unfortunately, not even the latest laboratory techniques are always successful in identifying affected children because they are more likely to have negative cultures and tuberculin skin test results, equivocal chest X-ray findings, and atypical clinical manifestations than adults. Furthermore, they are at greater risk of progressing from infection to active disease, particularly if they are very young. Consequently, pediatricians have to use different diagnostic strategies that specifically address the needs of children. This document describes the recommendations of a group of scientific societies concerning the signs and symptoms suggesting pediatric TB, and the diagnostic approach towards children with suspected disease.

Nutritional status, metabolic state and nutrient intake in children with bronchiolitis

Nutrition has a coadjuvant role in the management of children with acute diseases. We aimed to examine nutritional status, macronutrient requirements and actual macronutrient delivery in bronchiolitis. The nutritional status was classified according to WHO criteria and resting energy expenditure (MREE) was measured using an indirect calorimeter. Bland-Altman analysis was used to examine the agreement between MREE and estimated energy expenditure (EEE) with standard equations. Based on the ratio MREE/EEE in relation to Schofield equation on admission, we defined the subjects' metabolic status. A total of 35 patients were enrolled and 46% were malnourished on admission, and 25.8% were hypermetabolic, 37.1% hypometabolic and 37.1% normometabolic. We performed a 24-h recall in 10 children and 80% were overfed (AEI: MREE >120%). Mean bias (limits of agreement) with MREE was 8.9 (-73.9 to 91.8%) for Schofield; 61.0 (-41 to 163%) for Harris-Benedict; and 9.9 (-74.4 to 94.2%) for FAO-WHO equation. Metabolism of infants with bronchiolitis is not accurately estimated by equations.

Clostridium difficile infection in children: epidemiology and risk of recurrence in a low-prevalence country

Clostridium difficile infection (CDI) is increasingly found in children worldwide, but limited data are available from children living in southern Europe. A 6-year retrospective study was performed to investigate the epidemiology, clinical features, treatment, and risk of recurrence in Italy. Data of children with community- and hospital-acquired CDI (CA-CDI and HA-CDI, respectively) seen at seven pediatric referral centers in Italy were recorded retrospectively. Annual infection rates/10,000 hospital admissions were calculated. Logistic regression was used to investigate risk factors for recurrence. A total of 177 CDI episodes was reported in 148 children (83 males, median age 55.3 months), with a cumulative infection rate of 2.25/10,000 admissions, with no significant variability over time. The majority of children (60.8 %) had CA-CDI. Children with HA-CDI (39.2 %) had a longer duration of symptoms and hospitalization (p = 0.003) and a more common previous use of antibiotics (p = 0.0001). Metronidazole was used in 70.7 % of cases (87/123) and vancomycin in 29.3 % (36/123), with similar success rates. Recurrence occurred in 16 children (10.8 %), and 3 (2 %) of them presented a further treatment failure. The use of metronidazole was associated with a 5-fold increase in the risk of recurrence [odds ratio (OR) 5.18, 95 % confidence interval (CI) 1.1-23.8, p = 0.03]. Short bowel syndrome was the only underlying condition associated with treatment failure (OR 5.29, 95 % CI 1.17-23.8, p = 0.03). The incidence of pediatric CDI in Italy is low and substantially stable. In this setting, there is a limited risk of recurrence, which mainly concerns children treated with oral metronidazole and those with short bowel syndrome.

Acute otitis media with spontaneous tympanic membrane perforation

The principal aim of this review is to present the current knowledge regarding acute otitis media (AOM) with spontaneous tympanic membrane perforation (STMP) and to address the question of whether AOM with STMP is a disease with specific characteristics or a severe case of AOM. PubMed was used to search for all studies published over the past 15 years using the key words "acute otitis media" and "othorrea" or "spontaneous tympanic membrane perforation". More than 250 articles were found, but only those published in English and providing data on aspects related to perforation of infectious origin were considered. Early Streptococcus pneumoniae infection due to invasive pneumococcal strains, in addition to coinfections and biofilm production due mainly to non-typeable Haemophilus influenzae, seem to be precursors of STMP. However, it is unclear why some children have several STMP episodes during the first years of life that resolve without complications in adulthood, whereas other children develop chronic suppurative otitis media. Although specific aetiological agents appear to be associated with an increased risk of AOM with STMP, further studies are needed to determine whether AOM with STMP is a distinct disease with specific aetiological, clinical and prognostic characteristics or a more severe case of AOM than the cases that occur without STMP. Finally, it is important to identify preventive methods that are useful not only in otitis-prone children with uncomplicated AOM, but also in children with recurrent AOM and those who experience several episodes with STMP.

Anti-bacterial effect of essential oil from Xanthium strumarium against shiga toxin-producing Escherichia coli

Shiga toxin-producing Escherichia coli (STEC) serotype O157:H7 is one of the most important human pathogenic microorganisms, which can cause life-threatening infections. Xanthium strumarium L. is a plant with anti-bacterial activity against gram-negative and gram-positive bacteria. This study aims to demonstrate in vitro efficacy of the essential oil (EO) extracted from Xanthium strumarium L. against E. coli O157:H7. Using the agar test diffusion, the effect of Xanthium strumarium L. EO (5, 10, 15, 30, 60, and 120 mg/mL) was verified at each of the four different growth phases of E. coli O157:H7. Cell counts of viable cells and colony forming unit (CFU) were determined at regular time points using Breed's method and colony counting method, respectively. No viable cell was detectable after the 1 hour-exposure to X. strumarium EO at 30, 60, and 120 mg/mL concentrations. No bacterial colony was formed after 1 h until the end of the incubation period at 24 h. At lower concentrations, the number of bacteria cells decreased and colonies could be observed only after incubation. At the exponential phase, the EO at 15 mg/mL was only bacteriostatic, while from 30 mg/mL started to be bactericidal. X. strumarium EO antibacterial activity against Shiga toxin-producing E. coli O157:H7 is dependent on EO concentration and physiological state of the microorganisms tested. The best inhibitory activity was achieved during the late exponential and the stationary phases.

Dalbavancin for the treatment of paediatric infectious diseases

To review the topics of interest related to the use of dalbavancin in paediatric patients. PubMed was used to search for all of the studies published over the last 15 years using the key word "dalbavancin". A total of 36 manuscripts were selected, and due to the limited pediatric experience a further research was performed in order to identify clinical trials ongoing. Three studies that concerned children were found in clinicaltrials.gov. This review considers also the manuscripts published on the adult population in order to highlight the gaps requiring further research at pediatric age. Dalbavancin has emerged as a promising agent against resistant Gram-positive invasive infections. It is approved in the United States and Europe for the treatment of adult patients with acute bacterial skin and skin structure infections (SSTIs). Compared to other available antibiotics that are active against multi-resistant bacteria, the advantages of dalbavancin include a lower potential for drug interactions and the possibility of fewer required doses due to a longer half-life. Pharmacokinetic characteristics of dalbavacin are attractive for its clinical impact, especially for children who may avoid prolonged hospitalization and central venous access. However, further studies are needed to establish its appropriate paediatric dosage before it can be licensed for use in newborns and children. For younger patients, at a time when infections due to multidrug-resistant Gram-positive pathogens are increasing, dosage, efficacy and safety data for dalbavancin are needed to ensure the highest antimicrobial efficacy while also minimizing the risk of adverse events.