Micro Organisms and Their Correlated Diseases Flashcards Preview

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

Chronic Conjunctivitis

Staph Epidermidis

2

Conjunctivitis

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

Hyperacute Conjunctivitis

N. gonorrhoeae

4

Keratoconjunctivitis

HSV-1

5

Keratitis

Viral - HSV-1

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

Acanthamoeba

6

Uveitis

Iritis - Treponema pallidum, HSV, VZV

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

7

Endopthalmitis

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

8

Acute Otitits Media

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

Streptococcus pneumoniae

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

Haemophilus influenzae

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

Moraxella catarrhalis

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

95% produce Beta-lactamases

12

Otitis Externa

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

13

Toxoplasma

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

14

Pseudomonas aeruginosa

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

Acanthomoeba

Single cell, eukaryote that causes keratitis

Treat w/ -azoles

16

CMV

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

Brushfire eye exam