Diseases of the Eyes, Ears, and Wounds

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Last updated 5:33 PM on 4/8/26
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15 Terms

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Conjunctiva

Produces fluid that protects eye surface

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Cornea

Transparent, dome-shaped outermost layer at the front of the eye that acts as a protective window and the eye's primary focusing lens

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Conjunctivitis (Pink Eye) ~ Bacterial

Infection of the conjunctiva

  • Transmission: Eye secretions

  • Diagnosis: Purulent discharge

  • Prevention: Hygiene

  • Treatment: Antibiotic eye drops

  • Epidemiology: Very transmissible

<p>Infection of the <u>conjunctiva</u></p><ul><li><p>Transmission: Eye secretions</p></li><li><p>Diagnosis: Purulent discharge</p></li><li><p>Prevention: Hygiene</p></li><li><p>Treatment: Antibiotic eye drops</p></li><li><p>Epidemiology: Very transmissible</p></li></ul><p></p>
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Conjunctivitis (Pink Eye) ~ Viral

Infection of the conjunctiva

  • Transmission: Eye secretions

  • Diagnosis: Clear discharge

  • Prevention: Hygiene

  • Treatment: None

  • Epidemiology: Very transmissible

<p>Infection of the <u>conjunctiva</u></p><ul><li><p>Transmission: Eye secretions</p></li><li><p>Diagnosis: Clear discharge</p></li><li><p>Prevention: Hygiene</p></li><li><p>Treatment: None</p></li><li><p>Epidemiology: Very transmissible</p></li></ul><p></p>
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Ophthalmia Neonatorum

Newborn conjunctiva

  • Organism: Chlamydia trachomatis or Neisseria gonorrhoeae

  • Transmission: During vaginal birth

  • Prevention: All newborns treated

  • Treatment: Antibiotic eye drops/ointment

  • Epidemiology: Newborns

<p>Newborn <u>conjunctiva</u></p><ul><li><p>Organism: Chlamydia trachomatis or Neisseria gonorrhoeae</p></li><li><p>Transmission: During vaginal birth</p></li><li><p>Prevention: All newborns treated</p></li><li><p>Treatment: <u>Antibiotic</u> eye drops/ointment</p></li><li><p>Epidemiology: Newborns</p></li></ul><p></p>
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Trachoma

Causes chronic inflammation and scarring of eyelid/conjunctiva

  • Organism: Chlamydia trachomatis

  • Transmission: Eye secretions

  • Prevention: Hygiene

  • Treatment: Antibiotics

  • Epidemiology: Prevalent worldwide

<p>Causes chronic inflammation and scarring of <u>eyelid/conjunctiva</u></p><ul><li><p>Organism: Chlamydia trachomatis</p></li><li><p>Transmission: Eye secretions</p></li><li><p>Prevention: Hygiene</p></li><li><p>Treatment: <u>Antibiotics</u></p></li><li><p>Epidemiology: Prevalent worldwide</p></li></ul><p></p>
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Keratis

Infects cornea

  • Organism: HSV-1 (Herpes Simplex Virus 1)

  • Transmission: Reactivation of latent virus

  • Treatment: Antivirals

  • Epidemiology: Can cause blindness

<p><u>Infects cornea</u></p><ul><li><p>Organism: HSV-1 (Herpes Simplex Virus 1)</p></li><li><p>Transmission: Reactivation of latent virus</p></li><li><p>Treatment: <u>Antivirals</u></p></li><li><p>Epidemiology: Can cause blindness</p></li></ul><p></p>
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Ocular histoplasmosis

Fungus, abnormal blood vessel growth → blindness

  • Organism: Histoplasmosis capsulatum

  • Transmission: Contaminated soil

  • Treatment: Goal is to stop further damage

  • Epidemiology: Central US: causes blindness

<p><u>Fungus, abnormal blood vessel growth → blindness</u></p><ul><li><p>Organism: Histoplasmosis capsulatum</p></li><li><p>Transmission: Contaminated soil</p></li><li><p>Treatment: Goal is to stop further damage</p></li><li><p>Epidemiology: Central US: causes blindness</p></li></ul><p></p>
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Otitis Externa

Swimmer’s Ear

  • Location: Ear canal

  • Symptoms: Red, itchy, discharge

  • Causes: Bacterial, fungal, viral

    • Pseudomonas aeruginosa

    • Aspergillus sp.

<p>Swimmer’s Ear</p><ul><li><p>Location: Ear canal </p></li><li><p>Symptoms: Red, itchy, discharge</p></li><li><p>Causes: Bacterial, fungal, viral</p><ul><li><p>Pseudomonas aeruginosa</p></li><li><p>Aspergillus sp. </p></li></ul></li></ul><p></p>
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Otitis Media

Ear Infection

  • Location: Middle ear and eustachian tubes

  • Symptoms: Pain, discharge, pressure

  • Causes: Streptococcus pneumoniae or Haemophilus influenzae

<p>Ear Infection</p><ul><li><p>Location: Middle ear and eustachian tubes</p></li><li><p>Symptoms: Pain, discharge, pressure</p></li><li><p>Causes: Streptococcus pneumoniae or Haemophilus influenzae</p></li></ul><p></p>
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Otitis Interna

Labyrinthitis

  • Location: Inner ear

  • Symptoms: Vertigo, dizziness

  • Causes: Viral

<p>Labyrinthitis</p><ul><li><p>Location: Inner ear</p></li><li><p>Symptoms: Vertigo, dizziness</p></li><li><p>Causes: Viral</p></li></ul><p></p>
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Burn wounds

  • Organism: Psuedomonas aeruginosa

  • Gram-negative rod

<ul><li><p>Organism: Psuedomonas aeruginosa</p></li><li><p><u>Gram-negative rod</u></p></li></ul><p></p>
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Surgical Site Infections (SSIs)

  • Patient’s normal flora

    • Staphylococcus aureus

    • Escherichia coli

  • Fever, pus, redness at surgery site

<ul><li><p>Patient’s normal flora</p><ul><li><p>Staphylococcus aureus</p></li><li><p>Escherichia coli</p></li></ul></li><li><p>Fever, pus, redness at surgery site</p></li></ul><p></p>
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Gas Gangrene

Strict anaerobe, creates gas

  • Organism: Clostridium perfringens

  • Diagnosis: Gas pockets in deep tissue restrict blood flow → kill tissue

  • Treatment: Debridement; antibiotics

  • Epidemiology: Diabetes, childbirth, wound

<p>Strict anaerobe, creates gas</p><ul><li><p>Organism: Clostridium perfringens</p></li><li><p>Diagnosis: Gas pockets in deep tissue restrict blood flow → kill tissue</p></li><li><p>Treatment: Debridement; <u>antibiotics</u></p></li><li><p>Epidemiology: Diabetes, childbirth, wound</p></li></ul><p></p>
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Gangrene

Tissue death due to lack of blood flow