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Pathogenesis of corneal lesions in measles
Abstract:
The mechanism of pathogenesis underlying the development of corneal lesions in measles was investigated in 125 children suffering from measles and 66 age- and sex-matched healthy controls. Forty age-matched children with bronchopneumonia were investigated on similar lines to delineate the role played by vitamin A and measles individually in the development of corneal lesions. The results indicate that the pathogenesis of corneal lesions in measles is indeed multifactorial. Vitamin A deficiency alone or measles keratitis per se may not explain the mechanism completely. The immunosuppression induced by the local proliferation of the measles virus in the eye might trigger the invasion of pathogenic microbes which damage the cornea. The structural integrity of the cornea is already compromised by vitamin A deficiency and lesions of measles keratitis.
Insights
Measles can cause corneal lesions through a multifactorial process. Vitamin A deficiency and measles virus infection, along with secondary microbial invasion, contribute to eye damage in children.
Area of Science:
- Ophthalmology
- Infectious Diseases
- Pediatrics
Background:
- Measles is a common childhood illness that can lead to serious complications.
- Corneal lesions are a significant cause of visual impairment in children with measles.
- The exact mechanisms behind measles-induced corneal damage are not fully understood.
Purpose of the Study:
- To investigate the pathogenesis of corneal lesions in children with measles.
- To determine the individual and combined roles of measles virus and vitamin A deficiency in corneal damage.
- To explore the contribution of secondary microbial infections.
Main Methods:
- Case-control study involving 125 children with measles and 66 healthy controls.
- Comparison group of 40 children with bronchopneumonia to isolate the effects of measles and vitamin A.
- Clinical examination and assessment of corneal involvement.
Main Results:
- Corneal lesion development in measles is multifactorial.
- Neither vitamin A deficiency nor measles keratitis alone fully explains the pathogenesis.
- Measles virus-induced immunosuppression in the eye may facilitate microbial invasion.
- Pre-existing vitamin A deficiency and measles keratitis compromise corneal integrity.
Conclusions:
- The pathogenesis of measles-related corneal lesions is complex and involves multiple factors.
- Vitamin A deficiency and measles virus infection interact to increase corneal susceptibility.
- Secondary infections play a crucial role in the progression of corneal damage in measles patients.