Related Experiment Videos
Infectious oral necrosis (cancrum oris) in Nigerian children: a review
Insights
Cancrum oris (noma) is a devastating disease affecting Nigerian children, often triggered by malnutrition and measles. These factors weaken the immune system, allowing infections to spread rapidly, causing tissue death.
Area of Science:
- Pediatric infectious diseases
- Global health challenges
- Oral and maxillofacial pathology
Background:
- Cancrum oris (noma) is a severe gangrenous orofacial disease prevalent in underprivileged Nigerian children.
- Affected children often face multiple stressors including chronic malnutrition, endemic communicable diseases, and adverse environmental conditions.
- These conditions deplete adaptive resources and lead to physiological maladaptation.
Purpose of the Study:
- To elucidate the multifactorial pathogenesis of cancrum oris (noma) in Nigerian children.
- To identify key predisposing factors and infectious agents involved in noma development.
- To understand the progression from local infection to widespread tissue necrosis.
Main Methods:
- Review of clinical presentations and epidemiological data of noma in Nigerian children.
- Analysis of the interplay between malnutrition, measles infection, and immune status.
- Identification of microbial consortiums implicated in disease progression.
Main Results:
- Measles is the most frequent preceding infection in Nigerian children who develop noma.
- Malnutrition and measles infection lead to acquired immunodeficiency and impaired endocrine balance, facilitating viral spread.
- Anergy, resulting from malnutrition and measles, promotes the overgrowth of anaerobic organisms and synergistic bacterial invasion.
Conclusions:
- The pathogenesis of noma involves a complex interaction between host factors (malnutrition, immunodeficiency) and infectious agents.
- Measles infection acts as a critical trigger in susceptible, malnourished children.
- Rapid progression to extensive necrosis occurs due to depleted host defenses, distinguishing noma from localized infections like necrotizing ulcerative gingivitis.
Abstract:
The devastating orofacial gangrenous disease known as cancrum oris (noma) is still commonly seen in underprivileged Nigerian children. These children are usually victims of such stressors as chronic malnutrition, numerous endemic communicable diseases and severe adverse physical conditions which may lead to depletion of their adaptive resources or produce physiological maladaptation to additional stressors. Measles is the most common infection preceding the development of noma in Nigerian children. Acquired immunodeficiency as well as the impaired endocrine balance of the chronically malnourished permits, for example, widespread infection with the measles virus. Anergy resulting from the combination of malnutrition and measles virus infection promotes selective overgrowth and invasion by an infective consortium consisting of anaerobic organisms and other species capable of elaborating necessary growth factors for the former. Because of the pre-existing depletion of adaptive physiologic resources in the malnourished child, the infection is not readily contained locally as necrotizing ulcerative gingivitis but instead spreads rapidly to the next naturally occurring anatomical barriers. This is then followed by continuing necrosis and possible sequestration as exemplified by noma.