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Flashcards in Tasos CNS and Eye infections Deck (47)
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What are the symptoms of conjunctivitis?

- Redness of eye
- Watering of eye
- Yellow sticky coating on eyelashes
- Itchiness


What are the most common organisms that causes infective conjunctivitis?

- Staphylococcus aureus
- haemophilus influenzae
- Streptococcus pneumoniae
- Pseudomonas aeruginosa


What are the main modes of conjunctivitis transmission?

- Discharge from the conjunctivae or upper respiratory tract of infected persons (e.g droplets from coughing and sneezing): Primary transmittance
- Contaminated objects
- Infected mothers during vaginal delivery


What occurs in Ophthalmia neonatorum (neonatal jaundice)?

- Contracted during delivery by an infant whose mother is infected with gonorrhoea or chlamydia
- Can cause blindness if not promptly treated
- Usually appears 1 to 2 days post delivery


What is keratitis?

Inflammation or irritation of the cornea
- Characterised by cloudiness
- Infections generally occur after the cornea has been injured, allowing bacteria to enter
- Deeper the infection, more severe its symptoms and complications


What causes keratitis?

Bacterial infections
- Improper care or cleaning of contacts
- contaminated eye make up (usually aggressive infections, characterised by waking up with eyelids stuck together)


What is Acanthamoeba and what does it cause?

Acanthamoeba is a free-living amoeba
Found in bodies of water, soil and air
- Causes Acanthamoeba keratitis


What is Acanthamoeba keratitis and what are the symptoms?

- Infection of the cornea
- Can cause permanent visual impairment or blindness
> Pain
> Redness
> Blurred vision
> Photophobia
> Excessive tearing


What are some risks of infection of Acanthamoeba keratitis?

- Storing and handling lenses improperly
> Disinfecting lenses improperly
> Swimming, showering while wearing contacts
> Contact with contaminated water
> History of cornea trauma


What is Endophthalmitis? What is the most common type?

- Intraocular infection
- Most common type is post-operative endophthalmitis
- This condition is common after cataract surgery (1 in every 1000 patients)
- Around 3 to 12 days post op


Next questions concern periocular diseases (around the eye)

lets go


What is Blepharitis?

Refers to chronic inflammation of the eyelids
- Symptoms are normal eye conditions symptoms (redness, tearing, itching, photophobia etc) plus sandy, gritty sensation


What are the 3 forms of blepharitis?

1) Staphylococcal
2) Seborrheic
3) Meibomian gland dysfunction (MGD)


What occurs in Staphylococcal Blepharitis?

- Edge of eye becomes inflamed
- Ulcers may form because of secondary infection


What occurs in Seborrheic blepharitis?

- Redness of the lids
- Scales and flaking of eyelashes
- Often associated with dandruff of scalp


What occurs in Meibomian gland dysfunction blepharitis?

- Produces lipid like secretions that coat the tear layer to prevent evaporation
- Defects cause tears to evaporate more quickly
----> dryness
- Gland dysfunction due to clogging of oil


What is Canaliculitis?

Imflammation of the canaliculus
- Occurs in adults and causes a secondary conjunctivitis