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Miiiicro Block 8 > Eye Infections > Flashcards

Flashcards in Eye Infections Deck (29)
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1
Q

Differentiate conjunctivitis and keratitis

A

Keratitis: involves corneal lesions

Conjunctivitis: inflammation of conjunctiva

2
Q

Top two eye-related warning signs that prompt immediate action

A

Burning and pain

Loss of vision

3
Q

What are the two most common causes of infectious conjunctivitis?

A

Adenovirus

C. Trachomatis

4
Q

Differentiate viral and bacterial conjunctivitis using the symptoms discussed in class

A

-bacterial more likely to e bilateral

5
Q

What is the conjunctival response forbacteraila conjunctivitis

A

Pupillary or nonspecific mosaic of fibrovascular papilla (cobblestone)

6
Q

What is the conjunctival response for viral conjunctivitis

A

Follicular Avascular lyphmphoidal nodiesl (clear domes)

7
Q

Conj discharge in bacterial conjunctivitis

A

Muculopurulent

8
Q

Conj discharge for viral conjunctivitis

A

Watery or mucoid

9
Q

Conjunctival membrane in bacterial conjunvtivitis

A

Late onset

10
Q

Conjunctival membrane in viral conjunctivitis

A

Early onset

11
Q

Preauricular LAD in bacterial conjunctivitis

A

No

12
Q

Preauricular LAD in viral conjunctivitis

A

Yes

13
Q

Concurrent Ottis media is more common in what type of conjunctivitis

A

Bacterial

14
Q

Explain why al viral infections of the eye aren’t treated equally

A

Viral and bacterial infections need to be treated differently

15
Q

Identify the general body sites infected by chlamydia vs chlamydophila

A

Chlamydia is lungs, genitals, an eyes

Chlamydophilia is lungs

16
Q

What are the chlamydial serotypes responsible for the majority of blindness around the globe?

A

ABC

17
Q

Explain the significance of elementary bodies and reticulate bodies in terms of infectivity and production of inclusion bodies

A

Elementary bodies are too small to be seen on a stain but they are what is infectious

Reticular bodies are groups of elementary bodies contained within the cell and they DO NOT infect, but they are able to be seen on a stain and are diagnostic. This is what produces inclusion bodies

18
Q

Explain how chlamydia causes blindness

A

The upper lid gets inflamed and the scar tissue contracts the lid, causing the eyelashes to scrape the cornea repeatedly

19
Q

What is the leading cause of blindness, worldwide

A

Trachoma

20
Q

Describe the unique presentation of ocular gonorrhea in an adult

A
  • fulminant/hyperacute course
  • may have genitourinary symptoms
  • fountain of pus
  • complications: corneal rupture/perforation, ulcerative keratitis, visual loss, within 24 hours)
21
Q

Potential consequences of not treating gonorrhea in the eye

A

Corneal rupture/perforation
Ulcerative keratitis
Visual loss
Within 24 hours

22
Q

Describe a dendritic keratitis and identify the causative agent

A

Corneal ulcer with dendritic branching under a stain.

-caused by HSV (could be ZVZ if it was pseudodendritic)

23
Q

That is the disease process associated with pseudodendritic keratitis

A

ZVZ

24
Q

Most common source of bacterial keratitis

A

Sta aureus and pseudomonas auruginosa

25
Q

Gram stain description of the two most commonly implicated bacteria

A

Sta aureus
-cat/coag +

Ps. Aeruginosa

  • grow on chocolate agar, Mckonkeys, blood agar
  • non lactose fermenter does not turn purple
  • oxidase +
26
Q

What does acanthamoebal keratitis have in common with bacterial keratitis

A

Emergency

  • pain, redness, tearing, and decreased vision
  • CL history
  • corneal ulcer
27
Q

What is the causative agents of onchocerciasis

A

Onchocerca volvulus-filaria transmitted via blackfly worm dies and releases Wolbachia app and thats what causes blindness, not actually the onchocerca volvulus

28
Q

What is causative agent of loa loa

A
  • deer fly bites human
  • the worm develops in the eye
  • does not cause blindness
29
Q

What is the clinical observation of loa loa

A

Worm in eye
Calabar swelling

Not blindness