Infection In Preterm Neonates Research Articles

Cost-utility analysis of palivizumab for preventing respiratory syncytial virus in preterm neonates and infants in Colombia

AimPalivizumab has proven effective in reducing hospitalizations, preventing severe illness, improving health outcomes, and reducing healthcare costs for infants at risk of respiratory syncytial virus (RSV) infection. We aim to assess the value of palivizumab in preventing RSV infection in high-risk infants in Colombia, where RSV poses a significant threat, causing severe respiratory illness and hospitalizations.MethodsWe conducted a decision tree analysis to compare five doses of palivizumab with no palivizumab. The study considered three population groups: preterm neonates (≤ 35 weeks gestational age), infants with bronchopulmonary dysplasia (BPD), and infants with hemodynamically significant congenital heart disease (CHD). We obtained clinical efficacy data from IMpact-RSV and Cardiac Synagis trials, while we derived neonatal hospitalization risks from the SENTINEL-1 study. We based hospitalization and recurrent wheezing management costs on Colombian analyses and validated them by experts. We estimated incremental cost-effectiveness ratios and performed 1,000 Monte Carlo simulations for probabilistic sensitivity analyses.ResultsPalivizumab is a dominant strategy for preventing RSV infection in preterm neonates and infants with BPD and CHD. Its high efficacy (78% in preventing RSV in preterm infants), the substantial risk of illness and hospitalization, and the high costs associated with hospitalization, particularly in neonatal intensive care settings, support this finding. The scatter plots and willingness-to-pay curves align with these results.ConclusionPalivizumab is a cost-saving strategy in Colombia, effectively preventing RSV infection in preterm neonates and infants with BPD and CHD by reducing hospitalizations and lowering healthcare costs.

Handling of human milk to prevent acquired cytomegalovirus infection in Japanese neonatal intensive care units: The first nationwide survey.

Human milk (HM) has been proven to provide immunological and nutritional advantages to neonates; however, acquired cytomegalovirus (CMV) infection can be associated with raw HM. In Japan, there are no standardized guidelines concerning HM handling. This cross-sectional survey was performed to reveal specific trends in HM handling in neonatal intensive care units (NICUs) in Japan. A questionnaire was sent to 255 NICUs participating in the Japanese Neonatologist Association in May 2020. It involved HM handling practices, such as maternal screening, pasteurization, storage, and the workforce. Of 255 NICUs, 174 (67.8%) responded to the survey. Maternal CMV screening was carried out in 37 units (22.2%), and CMV inactivation in HM was performed in 44 units (26.5%). For CMV inactivation, a freeze-thawing method was employed in about 90% of units. In 70% of units providing CMV inactivation, CMV inactivation was conducted regardless of bodyweight and corrected gestational age of infants until the infants' discharge. Acquired CMV infection in preterm neonates was observed in 43 units (25.7%) in the survey period. A wide range of HM handling practices are used in Japanese NICUs. A national guideline for handling HM in NICUs should be created to promote the infection control of CMV.

Bacillus cereus Invasive Infections in Preterm Neonates: an Up-to-Date Review of the Literature.

Bacillus cereus group species are widespread, Gram-positive, spore-forming environmental bacteria. B. cereus sensu stricto is one of the major causes of food poisoning worldwide. In high-risk individuals, such as preterm neonates, B. cereus infections can cause fatal infections. It is important to note that the phenotypic identification methods commonly used in clinical microbiology laboratories make no distinction between B. cereus sensu stricto and the other members of the group (Bacillus anthracis excluded). As a result, all the invasive infections attributed to B. cereus are not necessarily due to B. cereus sensu stricto but likely to other closely related species of the B. cereus group. Next-generation sequencing (NGS) should be used to characterize the whole genome of the strains belonging to the B. cereus group. This could confirm whether the strains involved in previously reported B. cereus invasive infections preferentially belong to formerly known or emerging individual species. Moreover, infections related to B. cereus group species have probably been overlooked, since their isolation in human bacteriological samples has for a long time been regarded as an environmental contaminant of the cultures. Recent studies have questioned the emergence or reemergence of B. cereus invasive infections in preterm infants. This review reports our current understanding of B. cereus infections in neonates, including taxonomical updates, microbiological characteristics, bacterial identification, clinical features, host-pathogen interactions, environmental sources of contamination, and antimicrobial resistance.

Bloodstream Infections in Preterm Neonates and Mortality-Associated Risk Factors

To investigate the association of early (±4hours after onset of bloodstream infection) clinical and laboratory variables with episode-related mortality (<7days). This 2-site retrospective study included 142 neonates born at <35weeks of gestational age with positive blood/cerebrospinal fluid (CSF) culture at >72hours of age from organisms other than coagulase-negative Staphylococcus. Early variables were compared between those with bloodstream infection-related mortality and survivors. Multivariable analysis was conducted for the primary outcome, and the area under the curve (AUC) was estimated for relevant variables. The neonates who died were of lower gestational age at disease onset. After adjusting for relevant variables, lowest mean blood pressure (MBP) (aOR, 0.10; 95% CI, 1.02-1.19) and highest base deficit (aOR, 1.18; 95% CI, 1.06-1.32) were independently associated with mortality. The AUC was 0.87 (95% CI, 0.78-0.96) for base deficit, increasing to 0.91 (95% CI, 0.83-0.99) with the addition of MBP. Low MBP and high base deficit within ±4hours of bloodstream infection onset identify preterm neonates at risk of mortality.

Persistent microbial contamination of incubators despite disinfection.

In neonatal intensive care units (NICUs), hygiene and disinfection measures are pivotal to protect neonates from nosocomial infections. This study aimed to evaluate the efficacy of the classical incubators disinfection procedure and to follow-up neonates housed in the incubators for the development of late-onset sepsis (LOS). In a tertiary NICU, 20 incubators were monitored for bacterial contamination at three times: before disinfection, after disinfection, and 24 h after turning on and housing a new neonate. Clinical data of neonates housed in these incubators were retrieved from the medical records. All 20 incubators were contaminated at the 3 times of the study, mainly on mattresses and balances. Coagulase-negative Staphylococci, Enterococcus, and Bacillus-resisted disinfection while enterobacteria and Staphylococcus aureus were eradicated. After 24 h, the bacterial colonisation was similar to the one observed before disinfection. The bacteria isolated on incubators were also found on the caregivers' hands. During the study, two preterm neonates developed a LOS involving a bacterial species that has been previously isolated in their incubator. Pathogenic contaminants persist on incubators despite disinfection and represent a risk for subsequent infection in preterm neonates. Improvements are needed concerning both the disinfection process and incubator design. Procedures of disinfection that are usually recommended in NICUs do not allow for totally eradicating bacteria from incubators. Preterm neonates are housed in incubators colonised with potentially pathogenic bacteria. The control of nosocomial infections in NICUs requires further researches concerning mechanisms of bacterial persistence and ways to fight against environmental colonisation.

Bacillus cereus Induces Severe Infections in Preterm Neonates: Implication at the Hospital and Human Milk Bank Level.

Human breast milk (HBM) is a source of essential nutrients for infants and is particularly recommended for preterm neonates when their own mother’s milk is not available. It provides protection against infections and decreases necrotizing enterocolitis and cardiovascular diseases. Nevertheless, HBM spoilage can occur due to contamination by pathogens, and the risk of a shortage of HBM is very often present. B. cereus is the most frequent ubiquitous bacteria responsible for HBM being discarded. It can contaminate HBM at all stages, from its collect point to the storage and delivery. B. cereus can induce severe infection in newborns with very low birth weight, with sometimes fatal outcomes. Although the source of contamination is rarely identified, in some cases, HBM was suspected as a potential source. Even if the risk is low, as infection due to B. cereus in preterm infants should not be overlooked, human milk banks follow strict procedures to avoid contamination, to accurately identify remaining bacteria following pasteurization and to discard non-compliant milk samples. In this review, we present a literature overview of B. cereus infections reported in neonates and the suspected sources of contamination. We highlight the procedures followed by the human milk banks from the collection of the milk to its microbiological characterization in Europe. We also present improved detection and decontamination methods that might help to decrease the risk and to preserve the public’s confidence in this vital biological product for infants whose mothers cannot breastfeed.

The Effect of Single-Room Care Versus Open-Bay Care on the Incidence of Bacterial Nosocomial Infections in Pre-Term Neonates: A Retrospective Cohort Study.

IntroductionNosocomial infections (NIs) are a major source of iatrogenic harm in neonatal intensive care units (NICUs). The influence of the infrastructure of NICUs on NIs is not well documented. This study aims to examine the effect of single-room units (SRU) versus open-bay units (OBU) on the incidence of NIs, including central-line-associated bloodstream infections (CLABSI), in preterm neonates.MethodsAll preterm neonates (< 32 weeks gestational age) admitted to our NICU were included. Two study periods were compared: one prior to (May 2015–May 2017) and one following (May 2017–May 2019) transition from OBU to SRU. Incidence density (number of infections per 1000 patient-days) and cumulative incidence (number of infections per 100 neonates) for NIs were calculated. CLABSIs were calculated per 1000 central-line days. U chart analysis was performed to determine special-cause variation in quarterly CLABSI and NI rates. Multivariate competing risk regression was performed to identify independent NI risk factors.ResultsOf the 712 included infants, 164 (23%) infants acquired ≥ 1 NIs. No differences were found in incidence density (13.68 vs. 12.62, p = 0.62) or cumulative incidence of NI (23.97 vs. 22.02, p = 0.59) between OBU and SRU. CLABSIs showed a similar non-significant reduction after the move (14.00 vs. 10.59, p = 0.51). U chart analysis did not identify unit transition as a potential source of special-cause variation for CLABSI and NI. Competing risks regression analysis revealed longer duration of invasive mechanical ventilation as a significant risk factor for NI (subhazards ratio: 1.03 per day on ventilation, p = 0.01).ConclusionSingle-rooms are not associated with a significant reduction in NIs in the NICU. This study therefore does not add evidence that could support the transition to SRUs if based only on a large multimodal infection control strategy. Recommendations to build SRUs would require a wider justification, also taking into account other SRU benefits.Supplementary InformationThe online version contains supplementary material available at 10.1007/s40121-020-00380-9.

The Predictive Value of Procalcitonin and High-Sensitivity C-Reactive Protein for Early Bacterial Infections in Preterm Neonates

Introduction: Evidence on the reliability of using procalcitonin (PCT) and high-sensitivity C-reactive protein (hs-CRP) as diagnostic markers for early-onset neonatal bacterial infections is still insufficient because of their physiological elevation during the early neonatal period. This study aimed to assess the respiratory influence of serum PCT and hs-CRP levels and evaluate their predictive value for bacterial infections during the first 72 h of life in preterm neonates. Methods: The preterm neonates enrolled in this single-center retrospective cohort study were categorized into 3 groups: reference, infection-unlikely respiratory failure, and probable bacterial infection; their serum PCT and hs-CRP levels were assessed. Subsequently, age-specific 95th percentile curves were plotted and the median and cutoff PCT and hs-CRP levels for predicting bacterial infections at birth and 7–18, 19–36, and 37–72 h after birth were determined. Moreover, the analysis of PCT and hs-CRP with a neonatal sequential organ failure assessment (nSOFA) score was performed in very low birth weight neonates. Results: Serum PCT levels were influenced by respiratory failure. A significant difference was found in the median PCT and hs-CRP levels among the 3 groups at each time point. PCT sensitivities for predicting bacterial infection were slightly higher than those of hs-CRP in each time frame during the first 72 h of life. In both PCT and hs-CRP, there was no significant difference between infants with nSOFA scores of >4 and those with nSOFA scores of ≤4. Discussion/Conclusion: Age-specific evaluation showed that PCT has better predictive value than hs-CRP for early-onset bacterial infections in preterm neonates.

Severe COVID-19 during pregnancy and the subsequent premature delivery

Severe COVID-19 during pregnancy and the subsequent premature delivery

Fungal cutaneous microbiome and host determinants in preterm and term neonates.

The neonatal cutaneous mycobiome has not been characterized in preterm infants. Invasive fungal infections in preterm neonates are associated with high mortality. The immaturity of the preterm skin predisposes neonates to invasive infection by skin colonizers. We report the clinical and host determinants that influence the skin mycobiome. Skin swabs from the antecubital fossa, forehead, and gluteal region of 15 preterm and 15 term neonates were obtained during the first 5 weeks of life. The mycobiome was sequenced using the conserved pan-fungal ITS2 region. Blood samples were used to genotype immune modulating genes. Clinical metadata was collected to determine the clinical predictors of the abundance and diversity of the skin mycobiome. The neonatal mycobiome is characterized by few taxa. Alpha diversity of the mycobiome is influenced by antibiotic exposure, the forehead body site, and the neonatal intensive care unit (NICU) environment. Beta diversity varies with mode of delivery, diet, and body site. The host determinants of the cutaneous microbiome include single-nucleotide polymorphisms in TLR4, NLRP3,CARD8, and NOD2. The neonatal cutaneous mycobiome is composed of few genera and is influenced by clinical factors and host genetics, the understanding of which will inform preventive strategies against invasive fungal infections.

Fungal Ecology in a Tertiary Neonatal Intensive Care Unit after 16 Years of Routine Fluconazole Prophylaxis: No Emergence of Native Fluconazole-Resistant Strains.

We analyzed the fungal ecology of a neonatal intensive care unit (NICU) over a period of 20 consecutive years following the introduction of routine fluconazole prophylaxis for all very low birth weight (VLBW; <1,500 g at birth) preterm babies. The aim was to detect the possible appearance of any ecological shifts toward the emergence of native fluconazole-resistant (NFR) fungal species. This was a retrospective analysis of clinical and microbiological data of VLBW preterm neonates admitted to a large tertiary NICU in Italy from 1997 to 2016 and surviving more than 3 days. Colonization and infection incidence rates, both for fluconazole-sensitive Candida spp and NFR Candida spp, were calculated for each year. We compared the first 4-year period without prophylaxis (1997-2000) with the last 16-year period with use of routine fluconazole prophylaxis (2000-2016). Overall, the incidence of fungal colonization significantly decreased after the introduction of prophylaxis (from 43.4% to 16.5%) as well as the systemic fungal infection incidence (from 16% to 3.7%). The proportion of colonization and infection by NFR Candida spp, on the other hand, did not increase, remaining stable throughout the 16 years of exposure to fluconazole. During the prophylaxis period, 42 of 1,172 VLBW neonates were colonized by NFR species (3.6%), and of them 11 developed a systemic infection (0.9%). During the preprophylaxis period, colonization by these particular species affected 11 of 285 VLBW neonates (3.8%), and a systemic infection involved 4 neonates (1.4%). Fluconazole prophylaxis is effective in decreasing Candida colonization and systemic infections in preterm neonates in NICU and did not cause emergence or shifts toward NFR Candida spp over a 16-year surveillance period.

Prevalence of early onset neonatal septicemia in babies born to mother with pre-eclampsia

Context: Pregnancy induced hypertension (PIH) is one of the important risk factor for preterm delivery. Neutropenia and thrombocytopenia are well recognized neonatal sequelae to maternal hypertension in pregnancy. Preeclampsia-associated neutropenia is a risk factor for an increased incidence of infection in preterm neonates. Methods & material: 87 neonates born to mother with preeclampsia were included with aim to find prevalence of EOS and their haematological profile. Diagnostic work up includes complete blood count, CRP, blood culture and sensitivity (C/S) and other relevant investigations according to cases. Result: Out of 87 neonates, 7 neonates had EOS (8%) with blood culture proven bacterial sepsis, Klebsiella pneumonia (57.14%) was commonest organism isolated followed by E. Coli (28.57%) and Enterococci (14.28%). About 32 (36.76%) mothers had severe hypertension and 55(68.22%) mothers had mild to moderate preeclampsia. About 60(68.79%) neonates were born preterm. 40 (45%) neonates had neutropenia. 38 (43.65%) babies had thrombo-cytopenia. All 7 septic babies had neutropenia and thrombocytopenia. Conclusion: Early onset septicemia is more common in babies born to mother with preeclampsia due to associated Prematurity, Neutropenia and Thrombocytopenia. Hence preventive measures should focus on recognition of these high risk neonates with prompt laboratory screening for sepsis and early institution of empirical antibiotics based on local data.

Central Line-Associated Blood Stream Infections and Non–Central Line-Associated Blood Stream Infections Surveillance in Canadian Tertiary Care Neonatal Intensive Care Units

To determine if the reported reduction in hospital-acquired infections is due to reduced central line-associated blood stream infections (CLABSI) or non-CLABSIs. A retrospective cohort study design was used to describe the change in organism pattern and incidence of hospital-acquired infections (CLABSIs and non-CLABSIs) in neonates <33weeks of gestation admitted to tertiary neonatal intensive care units in the Canadian Neonatal Network between January 1, 2010, and December 31, 2016. Hospital-acquired infection was diagnosed when a pathogenic organism was isolated from blood or cerebrospinal fluid in a neonate with suspected sepsis. CLABSI was diagnosed when a central venous catheter was present at the time or removed in the 2days before a hospital-acquired infection diagnosis. Cochran-Armitage and Mann-Kendall trend tests and linear regression models were used for statistical analyses. Of 28 144 eligible neonates from 30 Canadian Neonatal Network neonatal intensive care units, 3306(11.7%) developed hospital-acquired infections. There was a significant decrease in the rate of hospital-acquired infections (14.2% in 2010 and 9.2% in 2016; P<.01), and the rate of both CLABSIs and non-CLABSIs (P<.01) over the study period concomitant with a significant decrease in the duration of central line use (P=.01). The rates of meningitis also decreased during the study period (1.2% in 2010 and 0.9% in 2016; P<.01). Infections owing to gram-positive cocci significantly decreased, but infections owing to gram-negative organisms remained unchanged. Although there was a significant decrease in CLABSIs and non-CLABSIs, hospital-acquired infections in preterm neonates remained high. Infections owing to gram-negative organisms remained unchanged and are a target for future preventative efforts.

Laktoferyna: wielokierunkowe działanie w profilaktyce i leczeniu zakażeń u noworodków urodzonych przedwcześnie

Laktoferyna: wielokierunkowe działanie w profilaktyce i leczeniu zakażeń u noworodków urodzonych przedwcześnie

Effect of Enteral Lactoferrin Administration on Invasive Fungal Infections in Preterm Neonates

Effect of Enteral Lactoferrin Administration on Invasive Fungal Infections in Preterm Neonates

Palivizumab for prophylaxis of respiratory syncytial virus infections in preterm neonates.

Recent data indicate that the number of children cared for respiratory syncytial virus (RSV) infections in hospitals is in the range of 50,000 to 100,000 per year in the United States 3. Major risk factors include apart from prematurity specifically below 29 weeks, congenital heart defects, Down syndrome and further congenital anomalies. The American Academy of Pediatrics recommended in 2014 a restriction of Palivizumab prophylaxis to preterm infants of &lt;29 weeks of gestation and those with a high-risk course postnatally and higher gestational ages apart from specific indications resulting from congenital anomalies including congenital heart defects 1.

Pulmonary hemorrhage due to Coxsackievirus B infection—A call to raise suspicion of this important complication as an end-stage of enterovirus sepsis in preterm twin neonates

BackgroundPrematurity is an important risk factor for the fulminate form of neonatal enteroviral infection. Pulmonary hemorrhage is a morbid complication that should be anticipated and managed aggressively due to its fatal outcome. ObjectiveTo emphasize the significance of pulmonary hemorrhage as a complication of severe enterovirus infection in preterm neonates. Study designThis report is a description of the clinical history, medical management and clinical outcomes of two pairs of preterm twin newborns (30 weeks and 36 weeks) with fulminant infection due to Coxsackievirus B (CBV) infection. ResultsMaternal fever was reported in both deliveries and it was a factor in the decision for urgent cesarean section of the 30-week twins. Three of the four infants failed to survive. Their clinical course involved multiple organ system failure complicated with profound disseminated intravascular coagulopathy and pulmonary hemorrhage. Pulmonary bleeding leading to hypovolemic shock and respiratory failure was the direct cause of death in two cases. ConclusionsThis small series of preterm neonates with the diagnosis of CBV sepsis highlights the importance of correct diagnosis of maternal enterovirus infection in order to extend pregnancy and allow the fetus time to passively acquire protective antibodies. This report emphasizes the morbid complication of pulmonary hemorrhage as a result of enterovirus infection that should be anticipated and managed aggressively due to its potentially fatal outcome. Moreover, evaluation and observation of the asymptomatic twin is recommended in order to detect early signs of infection and deterioration in that sibling as well.

Duration and intensity of fluconazole for prophylaxis in preterm neonates: a meta-analysis of randomized controlled trials.

BackgroundThe currently available evidence shows fluconazole is an effective prophylaxis treatment against invasive fungal infections in preterm neonates in neonatal intensive care units (NICUs). However, the duration and dosing of this prophylaxis treatment remain controversial. Thus, a meta-analysis and systematic review are necessary.MethodsPubMed and EMBASE were systematically searched with no restrictions. All relevant citations that compared prophylactic fluconazole and no prophylaxis were considered for inclusion. Pooled effect estimates were obtained through fixed- and random-effects meta-analyses, and a meta-regression was used to explore the sources of heterogeneity in the data.ResultsFive independent randomized controlled clinical trials (RCTs) involving 1006 preterm neonates were identified. Compared with no prophylaxis, the overall combined relative risks (RRs) of invasive fungal infection with the 28- and 42-day durations of prophylactic fluconazole were 0.80 (95 % CI 0.48–1.35, p = 0.4048) and 0.30 (95 % CI 0.15–0.58, p = 0.0004), respectively. The fluconazole dose had no significant impact on the RR of invasive fungal infections. The RR of mortality presented no significant differences between prophylactic fluconazole and no prophylaxis (RR 0.82, 95 % CI 0.60 to 1.12, p = 0.2093).ConclusionsProphylaxis with fluconazole for 42 days was found to be superior to no prophylaxis as a strategy for preventing invasive fungal infection in preterm infants in NICUs except in terms of mortality. The dosing regimen of prophylactic fluconazole may have no impact on the outcome; however, due to the limitations of the available data, further research is needed.

Significant Reduction of Catheter-associated Blood Stream Infections in Preterm Neonates After Implementation of a Care Bundle Focusing on Simulation Training of Central Line Insertion.

Central line-associated blood stream infections (CLABSIs) are common problems in neonatal intensive care units (NICUs). Implementation of catheter care bundles has been shown to reduce CLABSI rates. We developed a care bundle aiming at establishing a uniform central line insertion technique and improving teaching practices focusing on simulation-based techniques. The purpose of this study was to assess the impact of this care bundle on CLABSI rates in very low birth weight infants (VLBWI). In September 2010, a CLABSI prevention bundle was introduced in our NICU, consisting of simulation-based standardization and education of a peripherally inserted central catheter insertion technique. Data of all VLBWI admitted to our NICU during 2010-2012 were analyzed. Diagnosis of CLABSI required a positive blood culture in the presence of a central venous catheter and clinical signs of infection. Five hundred twenty-six VLBWI admitted during the study period were included into the analysis. CLABSI rates decreased significantly from 13.9 in 2010 to 9.5 in 2011 and 4.7 in 2012 (P < 0.0001). This significant reduction was true for the overall population and for subgroups separated by birth weight. Distribution of blood culture pathogens revealed a constant absolute and relative decline of infections with coagulase-negative staphylococci from 2010 (n = 43/50, 86%) to 2012 (n = 12/18, 67%), as opposed by a slight increase of Staphylococcus aureus infections (n = 1/50, 2% in 2010 versus n = 2/18, 11% in 2012). Our data provide evidence of a potential effect of simulation-based training of central line placement in decreasing CLABSI rates in VLBWI and encourage its implementation into care bundles.

Probiotic supplementation for preventing invasive fungal infections in preterm neonates--a systematic review and meta-analysis.

Invasive fungal infections (IFI) are associated with significant health burden in preterm neonates. The objective of this study was to systematically review effect of probiotic supplementation (PS) for preventing IFI in preterm neonates. We searched Cochrane Central Register of Controlled Trials, Medline, Embase, Cumulative Index of Nursing and Allied Health Literature, and proceedings of the Pediatric Academic Society meetings in August 2014. Study selection was performed on randomised controlled trials (RCT) of PS in neonates born <37 weeks. Primary outcome of this study was IFI (Isolation of fungus in blood/body fluids) and secondary outcome was fungal gut colonisation. Information on IFI/colonisation was available in 8 of 27 RCT. Meta-analysis (fixed effects model) showed that PS reduced the risk of IFI (RR: 0.50, 95% CI: 0.34, 0.73, I(2) = 39%). Results were not significant with random effects model (RR: 0.64, 95%, CI: 0.30, 1.38, P = 0.25, I(2) = 39%). Analysis after excluding the study with a high baseline incidence (75%) of IFI showed that PS had no significant benefits (RR: 0.89; 95% CI: 0.44, 1.78). Of the five studies reporting on fungal gut colonisation, three reported benefits of probiotics; two did not. Current evidence is limited to derive firm conclusions on the effect of PS for preventing IFI/gut colonisation in preterm neonates.