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Abstract

Ocular microsporidiosis is a significant emerging infectious disease reported in immunocompromised patients and immunocompetent persons throughout the world.

To identify the pathogens responsible for human keratitis, via corneal scrapings.

Thirty-three hospitalized patients with epithelial keratitis were examined using staining and DNA sequencing. DNA was extracted from corneal samples and the small-subunit ribosomal RNA gene was amplified by polymerase chain reaction (PCR) and sequenced.

Twenty-one samples were positive by staining while PCR generated amplicons in 18 cases. Of the 18 sequences, 16 were identical with, or very similar to, those of (99–100 % similarity) and the remaining two sequences were similar to that of unidentified species deposited in the GenBank.

This study has reconfirmed that causes epithelial keratitis in humans and that a newly detected species is also involved in microsporidial keratitis as one of the emerging pathogens in Thailand. Ophthalomologists should be aware of microsporidial keratitis in people from Thailand and those from neighbouring countries.

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/content/journal/jmm/10.1099/jmm.0.001164
2020-02-03
2020-02-28
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