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Updated: Jan 8, 2026

Intranasal Immunization and Milk Collection in Studies of Maternal Immunization in New Zealand White Rabbits Oryctolagus cuniculus
Published on: July 31, 2021
Total IgM levels at birth and in early infancy
Infant immunoglobulin M (IgM) levels at birth were comparable globally. However, IgM concentrations significantly increased in the first four months of life for infants in this study.
Area of Science:
- Immunology
- Pediatrics
- Neonatal Health
Background:
- Immunoglobulin M (IgM) is crucial for the early immune response in infants.
- Understanding neonatal and infant immune development is vital for public health in underdeveloped regions.
Purpose of the Study:
- To measure total IgM levels in newborns and young infants from an underdeveloped country.
- To compare these levels with existing data and analyze changes during early infancy.
Main Methods:
- Sera samples were collected from newborns and young infants.
- Total IgM concentrations were quantified using established laboratory methods.
Main Results:
- Mean (SD) IgM levels at birth were 12.4 (2.34) mg/dl, consistent with international reports.
- A notable increase in IgM concentrations was observed within the first four months of life.
Conclusions:
- Neonatal IgM levels are comparable across different geographical settings.
- Infant IgM levels undergo significant development in the first four months post-birth, indicating immune maturation.
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