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Microsporidial keratitis: need for increased awareness
Savitri Sharma1, Sujata Das, Joveeta Joseph
1L.V. Prasad Eye Institute, Bhubaneswar, Orissa, India. savitri@lvpei.org
Abstract:
Since the devastation of the European silk worm industry in the 19th century, microsporidia have been recognized as important organisms. An enormous literature is available on their biology, phylogeny, classification, disease profile, diagnosis, and treatment; however, it is only recently that ophthalmologists have begun to take note of these organisms. The last two decades have seen several publications related to ocular microsporidiosis, in particular those forms affecting the cornea. Both immunocompetent and immunocompromised patients are at risk of developing corneal infections that may range from self limiting mild keratoconjunctivitis to severe stromal keratitis recalcitrant to medical treatment. Exposure to soil, muddy water, and minor trauma are possible risk factors. Although reliable prevalence data are lacking, recent studies indicate a high prevalence of microsporidial keratoconjunctivitis in the rainy season, especially in India and other countries with similar climates. For instance, a high prevalence has been documented in Singapore. We bring together the information available on ocular microsporidiosis.
Insights
Microsporidia cause serious eye infections, particularly in the cornea, affecting both healthy and immunocompromised individuals. These infections are common in rainy seasons, especially in tropical climates.
Area of Science:
- Microbiology
- Ophthalmology
- Infectious Diseases
Background:
- Microsporidia are significant pathogens, historically impacting the European silkworm industry.
- Recent decades show increased attention to ocular microsporidiosis, especially corneal infections.
- Ocular microsporidial infections affect both immunocompetent and immunocompromised patients.
Purpose of the Study:
- To review and synthesize current knowledge on ocular microsporidiosis.
- To highlight the increasing incidence and clinical significance of microsporidial eye infections.
- To consolidate information on diagnosis, treatment, and risk factors for ocular microsporidiosis.
Main Methods:
- Literature review of publications on ocular microsporidiosis.
- Analysis of clinical presentations, from mild keratoconjunctivitis to severe keratitis.
- Examination of epidemiological data and risk factors, including environmental exposures.
Main Results:
- Ocular microsporidiosis can manifest as mild to severe corneal disease.
- Risk factors include exposure to soil, water, and minor eye trauma.
- High prevalence observed during rainy seasons, particularly in India and Singapore.
Conclusions:
- Ocular microsporidiosis is an emerging concern in ophthalmology.
- Prompt diagnosis and treatment are crucial for managing these infections.
- Further research is needed to establish accurate prevalence data and refine treatment strategies.
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