LISBON – A shift toward broader-spectrum antibiotics and increasing antibiotic resistance has led to high levels of mortality and neurodevelopmental impacts in surviving babies, according to a large international study conducted on four continents.
Results of the 3-year study were presented at this week’s European Congress of Clinical Microbiology & Infectious Diseases (ECCMID).
The observational study, NeoOBS, conducted by the Global Antibiotic Research and Development Partnership (GARDP) and key partners from 2018 to 2020, explored the outcomes of more than 3,200 newborns, finding an overall mortality of 11% in those with suspected neonatal sepsis. The mortality rate increased to 18% in newborns in whom a pathogen was detected in blood culture.
More than half of infection-related deaths (59%) were due to hospital-acquired infections. Klebsiella pneumoniae was the most common pathogen isolated and is usually associated with hospital-acquired infections, which are increasingly resistant to existing antibiotic treatments, said a report produced by GARDP to accompany the results.
The study also identified a worrying trend: Hospitals are frequently using last-line agents such as carbapenems because of the high degree of antibiotic resistance in their facilities. Of note, 15% of babies with neonatal sepsis were given last-line antibiotics.
Pediatrician Julia Bielicki, MD, PhD, senior lecturer, Paediatric Infectious Diseases Research Group, St. George’s University of London, and clinician at the University of Basel Children’s Hospital, Switzerland, was a coinvestigator on the NeoOBS study.
In an interview, she explained that, as well as reducing mortality, the research is about managing infections better to prevent long-term events and improve the quality of life for survivors of neonatal sepsis. “It can have life-changing impacts for so many babies,” Dr. Bielicki said. “Improving care is much more than just making sure the baby survives the episode of sepsis – it’s about ensuring these babies can become children and adults and go on to lead productive lives.”
Also, only a minority of patients (13%) received the World Health Organization guidelines for standard of care use of ampicillin and gentamicin, and there was increasing use of last-line agents such as carbapenems and even polymyxins in some settings in low- and middle-income countries. “This is alarming and foretells the impending crisis of a lack of antibiotics to treat sepsis caused by multidrug-resistant organisms,” according to the GARDP report.
There was wide variability in antibiotic combinations used across sites in Bangladesh, Brazil, China, Greece, India, Italy, Kenya, South Africa, Thailand, Uganda, and Vietnam, and often such use was not supported by underlying data.
Dr. Bielicki remarked that there was a shift toward broad-spectrum antibiotic use. “In a high-income country, you have more restrictive patterns of antibiotic use, but it isn’t necessarily less antibiotic exposure of neonates to antibiotics, but on the whole, usually narrow-spectrum agents are used.”
In Africa and Asia, on the other hand, clinicians often have to use a broader-spectrum antibiotic empirically and may need to switch to another antibiotic very quickly. “Sometimes alternatives are not available,” she pointed out.
“Local physicians are very perceptive of this problem of antibiotic resistance in their daily practice, especially in centers with high mortality,” said Dr. Bielicki, emphasizing that it is not their fault, but is “due to the limitations in terms of the weapons available to treat these babies, which strongly demonstrates the growing problem of antimicrobial resistance affecting these babies on a global scale.”
Tim Jinks, PhD, Head of Drug Resistant Infections Priority Program at Wellcome Trust, commented on the study in a series of text messages to this news organization. “This research provides further demonstration of the urgent need for improved treatment of newborns suffering with sepsis and particularly the requirement for new antibiotics that overcome the burden of drug-resistant infections caused by [antimicrobial resistance].”
“The study is a hugely important contribution to our understanding of the burden of neonatal sepsis in low- and middle- income countries,” he added, “and points toward ways that patient treatment can be improved to save more lives.”