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Klin Padiatr 2013; 225(02): 55-56
DOI: 10.1055/s-0033-1334959
Editorial
© Georg Thieme Verlag KG Stuttgart · New York

Nosocomial infections in Very preterm neonates – Improvements by further scientific research or discussions in talk shows?

Hospitalinfektionen bei sehr unreifen Frühgeborenen: Verbesserungen durch wissenschaftliche Forschung oder Diskussionen in Talk-Shows?
L. Gortner
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Publikationsdatum:
22. März 2013 (online)

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Nosocomial sepsis in very preterm neonates (gestational age < 32 weeks) has considerable implications in terms of acute mortality or life-threatening morbidity and the risk of long-term sequelae [5] [11] [19] [20]. During the past decade, nosocomial gram-negative translocation sepsis and necrotizing enterocolitis have been researched extensively with the aim to identify molecular, immunologic and clinical risk factors [17]. Molecular factors, such as polymorphisms in genes controlling local immunity and cell-to-cell-communication [17], immunologic risk factors including quantitative and qualitative specifics in complement components and innate immunity [10] as well as phagocytic activity and immunoglobulines [5] among others, have been identified as contributing factors in the development of the nosocomial sepsis. New and highly specific and sensitive diagnostic tools have been developed in order to identify neonates with sepsis early on [12]. Furthermore, in large clinical trials additional risk factors have been identified, those include, among others, vascular access for providing parenteral nutrition as well as babies who were born with a low birth weight following impaired intrauterine growth (IUGR – Intrauterine Growth Restriction) [7] [15]. Even the colonization with causative agents of nosocomial sepsis has been proven to be associated with the degree of neonatal immaturity and birth weight [14].

One major step in understanding the pathophysiology of nosocomial sepsis and necrotizing enterocolitis was the finding that microbial translocation from the neonatal intestine could explain a major part of the pathogenesis of necrotizing enterocolitis as well as nosocomial gram-negative translocation sepsis [17]. It has been shown that the immaturity of the local immune system within the intestine, cell-to-cell-communication and cell-mediated immunity are key players in the high susceptibility of very preterm neonates for developing gram negative sepsis [10] [17].

On the basis of our improved knowledge, a number of immunologic interventions were investigated in carefully controlled clinical trials, such as the administration of hematologic growth factors (GM-CSF and G-CSF) and intravenous and oral immunoglobulines, among others. So far, none of these concepts proved to be effective in reducing neither necrotizing enterocolitis nor nosocomial sepsis [5] [6] [9].

However, it had been clear for more than 2 decades that breast milk may reduce the frequency of nosocomial sepsis and necrotizing enterocolitis. This also has recently been proven for the administration of lactoferrin [13] and probiotics [8]. The adoption of a standardized nutritional regimen in very preterm neonates has further been shown to reduce above-mentioned complications [16].

Additionally, a decline of nosocomial infections was achieved through the implementation of programs for quality improvement through improved catheter care [11]. Moreover, national programs for quality control in neonatal care with respect to nosocomial infections (NEO-KISS program, Germany) [12] were also able to impact on the reduction of the severity of infections.

It is also known from registers in other settings that outcomes can be improved [18]. Registers, when using similar criteria, enable the scientific community to compare mortality and morbidity rates of e. g. nosocomial sepsis in very low birth weight neonates, who were cared for in different geographical regions: For example, the reported rates of nosocomial infections from a large German national network (German Neonatal Network, GNN) were recently reported to be between 9 and 10% and compared with the data from the Vermont-Oxford Network mainly enrolling neonates from North America, which was reported to be between 17 and 18%. Definitions of nosocomial infections and enrollment criteria, i. e., birth weight categories, were identical in both registers.

However, how do those improvements in the better understanding of the pathophysiology of nosocomial infections and the related progress in the field of neonatology translate into the German public perception in print and electronic media? During the past decade, a number of series of nosocomial infections attracted a considerable public interest in Germany. Public awareness has increased considerably during the last 3 years in particularly through the clusters of infections in various neonatal intensive care units in Berlin, Charité [2], Bremen [3] and in Mainz [1].

The leitmotif of all discussions in the public on nosocomial infections appears to be poor hygiene and public opinion seems to indicate that high numbers of infections could be prevented by improving hygienic measures, thereby ignoring the high risk state of very preterm neonates and the above outlined complex pathophysiology [4]. Through the press, it further has been suggested that several thousands of deaths could be readily prevented by improving basic hygienic measures in neonatal intensive care units [4].

Thus, there seems to be an increasing gap in the progress we were able to achieve with respect to understanding and preventing nosocomial infections in very preterm neonates and the public perception. This appears to be compounded by willful ignorance and sensational press. The longing for oversimplification along with aforementioned factors threatens the care for severely sick and susceptible neonates in German neonatal intensive care units by affecting the atmosphere of trust. Thus, German neonatology went from being the darling of the press to be the whipping boy. No parallels to this development have been reported from other developed countries.

It is the strong hope of the editor that the substantial progress that had been made by reducing nosocomial translocation sepsis in very preterm neonates will continue, e. g. by a targeted use of lactoferrin, probiotics and immune modulation. This in turn will enable us to further improve neonatal outcome with respect to mortality and long-term morbidity secondary to nosocomial infections. An objective dialogue between the German scientific neonatal community and investigative journalists is mandatory in order to regain a climate of confidence in German neonatal intensive care units, which got lost during the past decade secondary to above-mentioned events. The responsibility of media does not end in the quote of the viewers or the company’s profit.