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VBS 2032 -Exam 4 Review.
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VBS 2032 -Exam 4 Review.Learning Guide: Infectious Diseases of the Eyes
and Ears 4-19-19
Study Questions
1. Name some protective mechanisms of the eye.
-enclosure within bony orbits
-sclera covering
-eyelashes, blinking
-lacrimal gland secretions (IgA, lysozyme)
-normal microbiota is sparse (thinly spread)
2. What is the name and causative agents for infection of the conjunctiva? For infection
of the eyelids, for infection of the cornea?
Conjunctiva
inflammation of the conjunctiva (conjunctivitis)
-pain, inflammation, exudates
-strep pneumoniae, Haem influenza, chlamydia, gonorrhea
-adenovirus, herpes simplex, varicella zoster
Eyelids(blepheritis)
inflammation of the margins of the eyelids
-irritation, redness, burning, itching
-staph aureus
-Herpes simplex
-phthirius pubis (lice)
Cornea(keratitis)
inflammation of the
cornea
-pain, decrease in vision, discharge from eye
-S. aureus, S. pneumoniae, psuedomonas aeroguinosa
,VBS 2032 -Exam 4 Review.
-herpes simplex
-fungus: fusarium solani, aspergillus, acremonium, curvalaria
-parasites: acanthamoeba
3. What are the lacrimal
glands? Secrete tears
4. What is the causative agent of trachoma?
Chlamydia Trachomatis
5. How is trachoma spread?
direct person-to-person contact, shared clothes and towels, and eye-seeking
flies
6. What factors contribute to development of trachoma?
exposed human waste
unclean hands, contaminated
towels women, children 1-9
Poverty
Infection of type of
Chlamydia Flies infect
eyes
Unclean hands, towels
7. Where do the bacteria that cause periorbital and orbital cellulitis come from?
infection of the tissues surrounding the eye
bacteria from sinuses
-S. aureus
-Streptococci
-Haemophilus influenza
, VBS 2032 -Exam 4 Review.
8. What are the parts of the ear?
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