Micro Organisms and Their Correlated Diseases Flashcards Preview

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Flashcards in Micro Organisms and Their Correlated Diseases Deck (16)
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1
Q

Chronic Conjunctivitis

A

Staph Epidermidis

2
Q

Conjunctivitis

A

Neonate Bacterial: Chylmidia trachomatis, N. gonorrhea, S. aureas
Children Bacterial: S. aureus, S. pneumoniae, H. influenza
Adult Bacterial: S. aureus (C. trachomomatis (inclusion body and trachoma)

Neonate Viral: HSV
Adult Viral: Adneovirus (also HSV, Cocksackie, and VZV)

3
Q

Hyperacute Conjunctivitis

A

N. gonorrhoeae

4
Q

Keratoconjunctivitis

A

HSV-1

5
Q

Keratitis

A

Viral - HSV-1

Bacterial - S aureus, S. epi, P, aeruginosa, and B. Cereus

Acanthamoeba

6
Q

Uveitis

A

Iritis - Treponema pallidum, HSV, VZV

Chorioretinitis - Toxoplasma and CMV (HIV positive and neonates) Toxocara canis adn Onchocereca volvulus

7
Q

Endopthalmitis

A

Normal Flora (psuedomonas, staphylococci, or candida) secondary to cataract surgery

8
Q

Acute Otitits Media

A

Bacterial: S. pneumoniae (25-50%) H. influenza non-typable (15-30%), Moraxella catarrhalis (3-20%),

Viral: 5-22% especially RSV and rhinovirus

No pathogen identified: 16-25%

9
Q

Streptococcus pneumoniae

A

Gram positive diplococci that is transmitted by secretions.

Asymptomatic colonization of naso-oropharynx

Resistance due to changes in penicillin binding protein (clavulanate won’t help –> azithromycin)

Capsule - blocks phagocytosis by interfering with the deposition of complement on surface of organism

Choline-binding proteins - bind carbohydrates present on surface of epithelial cells

Neuraminidases - cleave host mucins

Pneumolysin - pore forming toxin is released that disrupts cilia

10
Q

Haemophilus influenzae

A

Small, pleomorphic, gram-negative, coccibacillus, nonmotile, biolfilms, facultative.

Chocolate agar

Nontypeable-nonencapsulated

Many have Beta-lactamases

Increased prevalence due to vaccine coverage of S. pneumo and typable H. inf

11
Q

Moraxella catarrhalis

A

Gram negative aerobic diplococcus, oxidase-positive, nonmotile, chocolate agar (hockey puck test!), pili

95% produce Beta-lactamases

12
Q

Otitis Externa

A

Acute localized - Staph
Acute diffuse - Pseudomonas aeruginosa
Malignant- Pseudomanas aeruginosa
Fungal - Aspergillus and Candida Albicans

13
Q

Toxoplasma

A

Most common parasitic disease. Late term congenital infx = progressive blindness, dx w/ IgM. Treat w. pyrimethamine and sulfadiazine

14
Q

Pseudomonas aeruginosa

A

Gram negative, aerobic rod, flagella

Contact lens wearers at greatest risk, opportunistic infx

Naturally resistant to many antibiotics due to biofilm capability

Produces pyocyanin which inhibit mitochondrial enzymes

15
Q

Acanthomoeba

A

Single cell, eukaryote that causes keratitis

Treat w/ -azoles

16
Q

CMV

A

Virus that is most common in HIV positive and neonates causing vision loss from chorioretinitis.

Brushfire eye exam