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Microbiome of the Eye01:22

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The human eye has a specialized microbiota that reflects its unique anatomical and immunological environment. This low-biomass microbial community predominantly colonizes the conjunctiva and eyelid margins, playing a vital role in ocular surface homeostasis and defense. Despite its proximity to the richly colonized facial skin, the ocular surface maintains a distinct microbial profile due to continuous mechanical and biochemical defense mechanisms.The conjunctival surface hosts fewer microbial...
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Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
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Related Experiment Video

Updated: May 5, 2026

Conjunctival Commensal Isolation and Identification in Mice
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Self-inflicted chronic bacterial keratoconjunctivitis using self semen.

Youngsub Eom1, Young-Ho Kim, Seung-Hyun Kim

  • 1Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea.

Korean Journal of Ophthalmology : KJO
|December 7, 2013
PubMed
Summary

A soldier developed chronic bacterial keratoconjunctivitis from self-inflicted semen exposure. This case highlights the importance of considering self-inflicted conditions in refractory eye infections.

Keywords:
KeratoconjunctivitisMalingeringSelf-inflicted disease

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Area of Science:

  • Ophthalmology
  • Microbiology

Background:

  • Chronic bacterial conjunctivitis can be challenging to treat.
  • Refractory cases require thorough investigation beyond standard etiologies.

Observation:

  • A 20-year-old male presented with persistent bilateral bacterial keratoconjunctivitis unresponsive to antibiotics.
  • Initial treatments included topical and systemic antibiotics based on conjunctival swab cultures.
  • Sperm were unexpectedly detected on Gram staining of conjunctival swabs during re-evaluation.

Findings:

  • The patient's chronic bacterial keratoconjunctivitis was confirmed to be self-inflicted.
  • The causative agent was linked to the patient's own semen exposure to the eyes.
  • This unusual etiology explained the lack of response to conventional treatments.

Implications:

  • Clinicians should consider self-inflicted ocular infections in refractory cases of keratoconjunctivitis.
  • Unconventional etiologies, such as semen exposure, should be investigated when standard treatments fail.
  • Awareness of self-inflicted conditions can lead to accurate diagnosis and appropriate management.