Related Experiment Video
Updated: Jul 26, 2026

A Neonatal Imaging Model of Gram-Negative Bacterial Sepsis
Published on: August 12, 2020
Effect of stressful environmental factors upon neonatal immune system
1Department of Medicine, Birsa University, Ranchi, India.
Insights
Environmental factors like indoor air pollution and poor hygiene negatively impact newborn immune systems, increasing infection risk. Animal cohabitation showed no significant effect on immunoglobulin levels.
Area of Science:
- Environmental Health
- Immunology
- Neonatal Health
Background:
- Neonatal immune systems are vulnerable to environmental stressors.
- Understanding environmental impacts on neonatal immunity is crucial for public health.
- Previous research has not fully elucidated the effects of specific environmental factors in rural Indian communities.
Purpose of the Study:
- To investigate the impact of indoor air pollution, hygiene, and animal cohabitation on neonatal serum immunoglobulin levels.
- To assess the correlation between these environmental factors and the incidence of gastrointestinal (GIT) and respiratory tract (RT) infections in neonates.
- To determine if adverse environmental conditions affect the developing immune system in newborns.
Main Methods:
- Serum immunoglobulin levels (IgG, IgA, IgM) were analyzed in 67 neonates from rural Indian tribal families.
- Neonates were grouped based on predominant environmental factors: indoor air pollution, hygiene, or animal cohabitation.
- Infection incidence (GIT, RT) was compared between experimental groups and a control group.
Main Results:
- Indoor air pollution and unhygienic conditions significantly depressed serum immunoglobulin levels in neonates.
- No clear correlation was found between animal cohabitation and immunoglobulin levels (except IgM).
- All experimental groups exhibited a higher incidence of GIT and RT infections compared to the control group.
Conclusions:
- Unfavorable environmental conditions, particularly indoor air pollution and poor hygiene, adversely affect neonatal immune systems.
- Neonatal exposure to detrimental environmental factors increases susceptibility to infections.
- Interventions to improve environmental conditions are essential for enhancing neonatal immunity and health outcomes.
Abstract:
To examine the effects of stressful environmental conditions upon the immune system of the newborn (neonates), we analyzed the neonatal serum immunoglobulin levels in a total of 67 neonates from tribal families living in a rural community of eastern India. These cases were grouped into three categories, based upon the predominance of one of the three factors being analyzed, and the reasonable absence of the other two factors. The three factors as determined by the prevailing environmental conditions, which were the basis for forming the three groups, were: 1. indoor air pollution; 2. hygienic conditions, and 3. the cohabitation of domesticated animals in the same household as the infants's families. Presence of indoor air pollution or unhygienic conditions resulted in the disturbance and depression of the levels of serum immunoglobulins of different classes. There was no discernible correlation found between the levels of immunoglobulins of different classes from the neonates (except IgM) and the cohabitation of domesticated animals in the same households. However the incidence of GIT and RT infections was higher in all the three experimental groups, as compared to the control group. These results suggest that unfavorable environmental conditions can adversely affect the immune system at neonatal stages, and can increase their susceptibility to subsequent acute or chronic events.
Related Concept Videos
Hypothalamic-Pituitary Axis
Introduction to Stress and Lifestyle
Physiological Foundation of Stress
Role of the Sympathetic Nervous System
Adrenaline triggers the...
Stress and Mental Health
Individuals with depression often experience challenges in both their personal and professional...
Psychoneuroimmunology: Cardiovascular Disease
A key area of focus in PNI is the relationship between stress and coronary...
Psychoneuroimmunology: Diabetes and Cancer

