According to Gram Research analysis, about 31% of premature babies born before 32 weeks develop infections while hospitalized. A 2026 retrospective study of 170 premature infants found that using special feeding tubes (PICC lines) tripled infection risk, vitamin D deficiency nearly tripled infection risk, but delayed cord clamping reduced infection risk by 75%. Hospitals can reduce infections through careful feeding tube management, early vitamin D supplementation, and routine delayed cord clamping.
Researchers studied 170 premature babies born before 32 weeks of pregnancy to understand why they catch infections in the hospital. They found that about one-third of these babies developed infections during their hospital stay, mostly in their lungs. The study identified three important factors that doctors can control: using special feeding tubes (called PICC lines) increased infection risk, vitamin D deficiency made infections more likely, and a simple procedure called delayed cord clamping actually protected babies from infections. These findings suggest hospitals can reduce infections by being more careful with feeding tubes, giving vitamin D early, and using delayed cord clamping.
Key Statistics
A 2026 retrospective cohort study of 170 premature infants born before 32 weeks found that 31% (53 infants) developed hospital-acquired infections, with lung infections being the most common type, accounting for 13.53% of all infections.
In the same 2026 study of 170 premature infants, delayed cord clamping reduced infection risk by 75% (adjusted odds ratio 0.265), while PICC catheterization increased infection risk by 217% (adjusted odds ratio 3.172).
A 2026 analysis of 170 premature infants showed that vitamin D deficiency increased hospital infection risk by 187% (adjusted odds ratio 2.867), and infected babies were 57% more likely to develop chronic lung disease (47.17% vs. 29.91%).
Among 170 premature infants studied in 2026, gram-negative bacteria caused 68% of hospital-acquired infections, with Klebsiella pneumoniae being the most frequently identified pathogen.
The Quick Take
- What they studied: How often premature babies born before 32 weeks catch infections while in the hospital, what causes these infections, and what doctors can do to prevent them.
- Who participated: 170 premature babies born before 32 weeks of pregnancy who stayed in a hospital’s intensive care unit in China between 2022 and 2024.
- Key finding: About 31 out of every 100 premature babies (31%) caught infections in the hospital. Lung infections were the most common type. Babies who had special feeding tubes placed were more likely to get infections, while babies who had delayed cord clamping (waiting to cut the umbilical cord) were less likely to get infections.
- What it means for you: If you have a premature baby, hospitals may be able to reduce infection risk by carefully managing feeding tubes, ensuring your baby gets vitamin D early, and using delayed cord clamping at birth. However, this study was done in one hospital in China, so results may differ in other settings.
The Research Details
Researchers looked back at medical records of 170 premature babies born before 32 weeks who were treated in one hospital’s intensive care unit over three years (2022-2024). They tracked which babies developed infections, what type of infections they had, and what germs caused them. They also looked at different factors in each baby’s care to see which ones made infections more or less likely.
To find the most important factors, the researchers used statistical methods that compared babies who got infections to those who didn’t. They tested many possible risk factors one at a time, then tested the most promising ones together to see which ones truly mattered. They also created a scoring system to predict which babies were at highest risk of infection.
The researchers compared how many babies in each group developed other serious complications like lung disease, eye problems, brain injury, and death.
This type of study is valuable because it looks at real-world situations in hospitals rather than controlled experiments. By studying babies who actually received different types of care, researchers can identify which practices help prevent infections. The study focused specifically on very premature babies (before 32 weeks), who are especially vulnerable, making the findings directly relevant to their care.
This study has several strengths: it included a reasonable number of babies (170), tracked them carefully over three years, and used proper statistical methods to identify which factors truly matter. However, the study was done in only one hospital in China, so results might be different in other countries or hospitals with different practices. The researchers couldn’t randomly assign babies to different treatments (like whether to use feeding tubes), so they can’t prove these factors directly cause infections—only that they’re associated with them.
What the Results Show
Among the 170 premature babies studied, 53 babies (31%) developed infections while in the hospital, with 61 total infection episodes. Lung infections were by far the most common, accounting for about 14% of all infections, followed by ventilator-associated pneumonia (infections in babies on breathing machines). The germs causing infections were mostly gram-negative bacteria, with Klebsiella pneumoniae being the most frequently identified species.
The study identified three factors that independently affected infection risk. Babies who had a special feeding tube called a PICC line placed were about 3 times more likely to develop infections. Babies with vitamin D deficiency were nearly 3 times more likely to get infections. In contrast, babies who had delayed cord clamping (waiting 30-60 seconds after birth before cutting the umbilical cord) were about 75% less likely to develop infections.
The researchers created a prediction model using these three factors that could correctly identify high-risk babies about 76% of the time. When they compared babies who got infections to those who didn’t, they found that infected babies were more likely to develop bronchopulmonary dysplasia (a chronic lung condition), occurring in 47% of infected babies versus 30% of non-infected babies.
The study found no significant differences between infected and non-infected babies in rates of retinopathy of prematurity (an eye condition), brain injury, or death during hospitalization. This suggests that while infections are common in this population and can lead to lung complications, they may not directly cause the most severe outcomes measured in this study.
According to Gram Research analysis, this study confirms what previous research has suggested: premature babies are highly vulnerable to hospital-acquired infections due to their immature immune systems and need for invasive medical procedures. The finding that vitamin D deficiency increases infection risk aligns with growing evidence that vitamin D plays an important role in immune function. The protective effect of delayed cord clamping is consistent with recent research showing this simple practice provides multiple benefits for premature infants. The high percentage of gram-negative bacteria infections matches patterns seen in other neonatal intensive care units worldwide.
This study looked at babies in only one hospital in China, so the results may not apply to hospitals in other countries or regions with different practices and patient populations. The study couldn’t prove that these factors directly cause infections—only that they’re associated with them. Some important information might have been missing from medical records. The study didn’t look at other potential protective factors like hand hygiene practices or antibiotic use policies that might have affected infection rates.
The Bottom Line
Based on this research, hospitals should consider: (1) implementing careful protocols for managing PICC feeding tubes to reduce infection risk (strong evidence), (2) screening premature babies for vitamin D deficiency and providing early supplementation (moderate evidence), and (3) routinely using delayed cord clamping at birth for premature infants (moderate evidence). These are all relatively simple, low-cost interventions that may significantly reduce infections.
Parents of premature babies born before 32 weeks should discuss these findings with their neonatal care team. Healthcare providers in neonatal intensive care units should review their current practices regarding feeding tube management, vitamin D screening, and cord clamping protocols. Hospital administrators and quality improvement teams can use these findings to develop infection prevention programs. This research is less relevant for parents of full-term babies or babies born after 32 weeks, who have lower infection risk.
If hospitals implement these changes, they should see reductions in infection rates within weeks to months as new protocols are adopted. Individual babies may show benefits from delayed cord clamping and vitamin D supplementation immediately, though infection prevention is a long-term benefit. Improvements in lung disease rates (bronchopulmonary dysplasia) might take longer to measure, as this develops over weeks of hospitalization.
Frequently Asked Questions
Why do premature babies get more infections in the hospital?
Premature babies born before 32 weeks have immature immune systems that can’t fight germs as well as full-term babies. They also need invasive procedures like breathing tubes and feeding tubes, which can introduce bacteria. This 2026 study of 170 infants found 31% developed infections during hospitalization.
Can vitamin D help prevent infections in premature babies?
Research suggests vitamin D plays an important role in immune function. This 2026 study found premature babies with vitamin D deficiency were nearly 3 times more likely to develop infections, suggesting early vitamin D screening and supplementation may help prevent infections.
What is delayed cord clamping and does it help premature babies?
Delayed cord clamping means waiting 30-60 seconds after birth before cutting the umbilical cord, allowing more blood to transfer to the baby. This 2026 study found it reduced infection risk by 75% in premature infants born before 32 weeks.
Are feeding tubes dangerous for premature babies?
Feeding tubes (PICC lines) are necessary for premature babies but do increase infection risk. This 2026 study found they tripled infection risk. Hospitals can minimize danger through careful insertion and maintenance protocols and regular monitoring for signs of infection.
What infections are most common in premature babies in the hospital?
Lung infections (pneumonia) are most common, occurring in about 14% of premature babies in this 2026 study of 170 infants. Gram-negative bacteria, particularly Klebsiella pneumoniae, caused 68% of infections, suggesting these are the primary targets for prevention efforts.
Want to Apply This Research?
- Track daily vitamin D supplementation doses and dates, PICC line insertion and removal dates, and any signs of infection (fever, feeding intolerance, increased respiratory support). Monitor vitamin D blood levels at recommended intervals.
- Parents can work with their care team to ensure: (1) vitamin D screening happens early and supplementation begins if needed, (2) they understand the importance of delayed cord clamping and confirm it was performed at birth, and (3) they ask about PICC line care protocols and infection prevention measures being used.
- Create a timeline tracking vitamin D levels, PICC line status, and infection episodes. Set reminders for vitamin D supplementation if prescribed. Document any infections that develop and their treatment. Share this information with your healthcare team at each visit to identify patterns and adjust care as needed.
This research describes patterns observed in one hospital and cannot prove direct cause-and-effect relationships. Results may vary in different hospitals and countries. This information is for educational purposes and should not replace professional medical advice. Parents of premature infants should discuss these findings with their neonatal care team to determine what interventions are appropriate for their individual baby. Always follow your healthcare provider’s recommendations for your child’s care.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.