Enrico Valletta

Dr. Enrico Valletta

orcid

Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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12 June 2023 in Antibiotics
Verified
Journal Article
Open access
PDF file
GAGiovanni Autore
Giovanni Autore
LBLuca Bernardi
Luca Bernardi
FGFilippo Ghidini
Filippo Ghidini
CSClaudio La Scola
Claudio La Scola
ABAlberto Berardi
Alberto Berardi
TGThe UTI-Ped-ER Study Group
The UTI-Ped-ER Study Group
Background: Urinary tract infection (UTI) represents one of the most common infectious diseases and a major cause of antibiotic prescription in children. To prevent recurrent infections and long-term complications, low-dose continuous antibiotic prophylaxis (CAP) has been used. However, the efficacy of CAP is controversial. The aim of this document was to develop updated guidelines on the efficacy and safety of CAP to prevent pediatric UTIs. Methods: A panel of experts on pediatric infectious diseases, pediatric nephrology, pediatric urology, and primary care was asked clinical questions concerning the role of CAP in preventing UTIs in children. Overall, 15 clinical questions were addressed, and the search strategy included accessing electronic databases and a manual search of gray literature published in the last 25 years. After data extraction and narrative synthesis of results, recommendations were developed using the Grading of Recommendations, Assessment, Development, and Evaluations (GRADE) methodology. Results: The use of CAP is not recommended in children with a previous UTI, with recurrent UTIs, with vesicoureteral reflux (VUR) of any grade, with isolated hydronephrosis, and with neurogenic bladder. CAP is suggested in children with significant obstructive uropathies until surgical correction. Close surveillance based on early diagnosis of UTI episodes and prompt antibiotic therapy is proposed for conditions in which CAP is not recommended. Conclusions: Our systematic review shows that CAP plays a limited role in preventing recurrences of UTI in children and has no effect on its complications. On the other hand, the emergence of new antimicrobial resistances is a proven risk.

17 April 2023 in Children
Verified
Journal Article
Open access
PDF file
Melodie Olivia AricòMelodie Olivia Aricò
Melodie Olivia Aricò
EVEnrico Valletta
Enrico Valletta
DCDésirée Caselli
Désirée Caselli
Antibiotics account for over 10% of the overall drug expense of the National Health System in Italy in 2021. Their use in children is of particular interest on one side, because acute infections are very common in children, while they build their immunologic library of competence; on the other side, although many acute infections are expected and turn out to be of viral origin, caregivers will often ask the family doctor or primary care attending to reassure them by prescribing antibiotic treatment, although it may often be unnecessary. The inappropriate prescription of antibiotics in children may likely be a source not only of undue economic burden for the public health system but also of increasing development of antimicrobial resistance (AMR). Based on those issues, the inappropriate use of antibiotics in children should be avoided to reduce the risks of unnecessary toxicity, increase in health costs, lifelong effects, and selection of resistant organisms causing undue deaths. Antimicrobial stewardship (AMS) describes a coherent set of actions that ensure an optimal use of antimicrobials to improve patient outcomes while limiting the risk of adverse events including AMR. The aim of this paper is to spread some concept of good use of antibiotics for pediatricians or every other physician involved in the choice to prescribe, or not, antibiotics in children. Several actions could be of help in this process, including the following: (1) identify patients with high probability of bacterial infection; (2) collect samples for culture study before starting antibiotic treatment if invasive bacterial infection is suspected; (3) select the appropriate antibiotic molecule based on local resistance and narrow spectrum for the suspected pathogen(s); avoid multi-antibiotic association; prescribe correct dosage; (4) choose the best route of administration (oral vs. parenteral) and the best schedule of administration for every prescription (i.e., multiple administration for beta lactam); (5) schedule clinical and laboratory re-evaluation with the aim to consider therapeutic de-escalation; (6) stop antibiotic administration as soon as possible, avoiding the application of “antibiotic course”.

12 September 2025 in Infectious Disease Reports
Verified
Journal Article
Open access
PDF file
Melodie Olivia AricòMelodie Olivia Aricò
Melodie Olivia Aricò
FAFrancesco Accomando
Francesco Accomando
DTDaniela TROTTA
Daniela TROTTA
GMGiulia Marozzi
Giulia Marozzi
AMAnthea Mariani
Anthea Mariani
Maurizio AricòMaurizio Aricò
Maurizio Aricò
Background/Objectives: Respiratory syncytial virus (RSV) bronchiolitis remains a leading cause of hospitalization in infants. In the 2024–2025 season, passive newborn immunization with nirsevimab, a long-acting anti-RSV monoclonal antibody, was introduced for the first time in Italy. However, the immunization campaign was not uniformly implemented on a regional basis due to supply and organizational difficulties. The aim of the study was to assess the real-world impact of nirsevimab prophylaxis during the 2024–2025 bronchiolitis season in four regions of Italy. Methods: This multicenter observational study included infants <12 months hospitalized for bronchiolitis across four Italian centers. Hospitalizations due to RSV and non-RSV bronchiolitis were compared across the 2023–2024 and 2024–2025 seasons, in relation to the timing and coverage of nirsevimab’s introduction in each of the four regions. Results: Early and widespread nirsevimab administration was associated with a significant reduction in RSV hospitalizations and severity of disease. Centers located in regions that had delayed implementation of immunization observed higher RSV burden and intensive care unit admissions. Admissions for non-RSV bronchiolitis remained stable. Conclusions: Timely and universal administration of nirsevimab significantly reduced RSV hospitalizations and severity, while delayed implementation resulted in limited benefit. These findings support early and uniform prophylaxis to mitigate health disparities and seasonal pressure on pediatric healthcare systems.

13 October 2023 in Pediatric Reports
Verified
Journal Article
Open access
PDF file
Melodie Olivia AricòMelodie Olivia Aricò
Melodie Olivia Aricò
DWDiana Wrona
Diana Wrona
GLGiovanni Lavezzo
Giovanni Lavezzo
EVEnrico Valletta
Enrico Valletta
In treating acute bronchiolitis in infants, the decision to use continuous positive airway pressure (CPAP) often involves infant referral from the pediatric ward to the pediatric intensive care unit (PICU). We present our experience of CPAP use in a general pediatric ward, aiming to reduce the pressure on the PICU in recent outbreaks of bronchiolitis. Clinical data of patients less than 12 months of age and admitted for bronchiolitis from 1 October 2021 to 31 March 2023 were retrospectively collected. Of 82 infants admitted for bronchiolitis, 16 (19%) were treated with nasal CPAP (nCPAP group); of the remaining 66, 21 (26%) were treated with a low-flow nasal cannula (LFNC) only, 1 (1%) was also treated a with high-flow nasal cannula (HFNC), 12 (15%) were treated with an HFNC only, and 41 (50%) were treated without oxygen support (no-nCPAP group). Overall, coinfection with RSV and SARS-CoV-2 was observed in three patients and SARS-CoV-2 infection was observed in two patients. None of them required any type of oxygen support. Only 3/16 (19%) infants in the nCPAP group were referred to the PICU due to worsening clinical conditions despite nCPAP support. In our experience of treating epidemic bronchiolitis, nCPAP can be safely managed in a general pediatric ward, thus reducing the burden of admissions to the PICU. Training and regular updating of the pediatric staff, careful monitoring of the patient, and close cooperation with the PICU were instrumental for our team.

1 August 2025 in Acta Paediatrica
Verified
Journal Article
Closed access
MAMaurizio Aricò
Maurizio Aricò
EVEnrico Valletta
Enrico Valletta
LSLiborio Stuppia
Liborio Stuppia
MFMartina Fornaro
Martina Fornaro
MAMelodie O. Aricò
Melodie O. Aricò
DCDesiree Caselli
Desiree Caselli

23 August 2025 in Vaccines
Verified
Journal Article
Open access
PDF file
Susanna EspositoSusanna Esposito
Susanna Esposito
VFValentina Fainardi
Valentina Fainardi
MCMaria Elena Capra
Maria Elena Capra
Melodie Olivia AricòMelodie Olivia Aricò
Melodie Olivia Aricò
ALAngela Lanzoni
Angela Lanzoni
SPSerafina Perrone
Serafina Perrone
Background: Respiratory syncytial virus (RSV) bronchiolitis remains a leading cause of hospitalization in infants, particularly those with risk factors such as prematurity or chronic diseases. Nirsevimab, a long-acting monoclonal antibody, has recently been approved for RSV prevention. However, parental acceptance of this novel immunoprophylaxis is crucial for effective implementation. The aim of this study was to investigate parental acceptance of nirsevimab prophylaxis for RSV among eligible neonates in Emilia-Romagna, Italy, and to identify factors influencing decision making. Methods: A prospective, multicenter observational study enrolled 1042 parents of neonates eligible for nirsevimab prophylaxis according to regional criteria. Parents completed a semi-structured questionnaire during pre-immunization counseling, exploring knowledge, attitudes, perceived risks, information sources, and willingness to accept prophylaxis. Statistical analysis assessed associations between parental characteristics and acceptance rates. Results: Among the 1042 respondents, 87.0% (n = 907) expressed willingness to administer nirsevimab to their child, while 2.2% (n = 23) refused and 8.8% (n = 92) were undecided. Higher acceptance was significantly associated with awareness of RSV risks (72.1% vs. 41.7%, p < 0.01), belief in nirsevimab’s high efficacy (46.2% vs. 18.3%, p < 0.01), and lower concern over side effects (10.6% vs. 27.8%, p < 0.01). Trust in primary care pediatricians and the healthcare system was also notably higher among accepting parents (p < 0.001). Willingness to pay declined with a hypothetical EUR 250 cost but remained higher among the acceptance group (71.0% vs. 50.4%, p < 0.001). Conclusions: Parental acceptance of nirsevimab in Emilia-Romagna was high, though significant gaps in knowledge and concerns about safety persist. Targeted educational strategies that clarify the nature, efficacy, and safety of nirsevimab—alongside maintaining cost-free access—are essential to support the successful implementation of RSV prophylaxis programs.