Distinct early gut microbiota patterns by delivery mode within 100 hours of birth

Palittiya Sintusek1, Pavit Klomkliew2, Suthida Visedthorn2

  • 1Center of Excellence in Thai Pediatric Gastroenterology, Hepatology and Immunology, Division of Gastroenterology, Department of Pediatrics, King Chulalongkorn Memorial Hospital, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand. palittiya.s@chula.ac.th.

Insights

Cesarean section (CS) delivery in neonates is linked to altered gut microbiota composition and reduced beneficial Bifidobacterium colonization within the first 100 hours. Targeted strategies may support CS-infant gut health.

Area of Science:

  • Microbiology
  • Neonatal Health
  • Gut Microbiome Research

Background:

  • Early-life gut microbiome disruptions are linked to health issues.
  • Limited research exists on gut microbiota establishment in the immediate postnatal period.

Purpose of the Study:

  • To characterize the gut microbiota of neonates within the first 100 hours after birth.
  • To investigate the impact of delivery mode on early microbial colonization.

Main Methods:

  • Analysis of stool samples from 140 healthy neonates using 16S rDNA sequencing.
  • Categorization of samples by delivery mode (vaginal delivery vs. cesarean section) and collection time.
  • Assessment of microbiota diversity and composition.

Main Results:

  • Cesarean section (CS) delivery was associated with higher gut microbiota diversity (alpha and beta).
  • A reduction in gut microbiota diversity was observed 48 hours post-birth.
  • CS neonates showed reduced Bifidobacterium colonization and increased skin/environmental taxa compared to vaginal delivery infants.

Conclusions:

  • Delivery mode significantly influences early gut microbial assembly in neonates.
  • CS-delivered infants exhibit distinct gut microbiota profiles, with reduced beneficial bacteria.
  • Targeted interventions are needed to promote healthy gut microbiota in infants born via CS.
Abstract

Related Concept Videos

Development of Human Microbiota01:30

Development of Human Microbiota

The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...
Development of the Oral Microbiota01:28

Development of the Oral Microbiota

The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...
Anatomy of the Intestines01:23

Anatomy of the Intestines

Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the small...
Introduction to the Human Microbiota01:22

Introduction to the Human Microbiota

Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity, and disease...
Microbiota Modulation by Antibiotics01:21

Microbiota Modulation by Antibiotics

Antibiotics have revolutionized modern medicine by saving countless lives from bacterial infections. However, their widespread use has inadvertently harmed the delicate balance of the human gut microbiota. The gut microbiota, a complex community of bacteria, archaea, viruses, and fungi, plays a vital role in regulating metabolism, immune responses, and maintaining intestinal health. Antibiotics, especially broad-spectrum types, disrupt this ecosystem by eradicating both harmful and beneficial...
Microbiota of the Stomach and Small Intestine01:27

Microbiota of the Stomach and Small Intestine

The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...