Bacterial Infections

Question 1

What is the primary organism that causes Impetigo?

Answer 1

Staphylococcus Aureus

*Streptococcus Pyogenes is another that can cause it

Question 2

Which type of impetigo is more prevalent, frequently found on legs, and is seen in school-aged children?

Answer 2

Non-bullous Impetigo

*treated with topical antibiotics

Question 3

Which type of impetigo is seen more commonly in infants, can lead to meningitis, pneumonia and glomerulonephritis, and have a thin brown crust?

Answer 3

Bullous Impetigo

*Superficial vesicles rapidly enlarge to form larger, flaccid bullae

Question 4

What are three things that can cause Tonsillitis or Pharyngitis?

Answer 4

1-Group A Beta-hemolytic streptococci
2-Influenza virus
3-Epstein-Barr virus

*Majority are caused by a virus

Question 5

What are two sequelae of Streptococcal pharyngitis and tonsillitis?

Answer 5

1-Scarlet fever

2-Rheumatic fever (Rheumatic heart disease, Acute glomerulonephritis)

Question 6

What oral feature of Scarlet fever would you expect to see in the first 2 days?

Answer 6

White Strawberry tongue

Question 7

What oral feature of Scarlet fever would you expect to see in days 4-5?

Answer 7

Red Strawberry tongue

Question 8

A rash in areas of pressure and skin folds is associated with scarlet fever and called what?

Answer 8

Pastia’s lines

Question 9

Pharyngeal tonsillar crypts that are filled with desquamated keratin and foreign material are called what?

Answer 9

• Tonsillar concretions (foul smelling)
• Tonsillolith (calcified)

*usually colonized by Actinomyces

Question 10

Which disease is caused by cornebacterium diphtheria of which humans are the sole reservoir and results in tissue necrosis and cardiac complications?

Answer 10

Diptheria

Question 11

Which disease is caused by treponema pallidum and is primarily a sexually transmitted disease but is also passed mother to fetus?

Answer 11

Syphilis

*3 stages

Question 12

Which stages of syphilis is characterized by painless ulcerations called chancres?

Answer 12

Primary syphilis

*most commonly on anus or external genitals

Question 13

Which stage of syphilis is also known as disseminated syphilis and is always a diffuse, painless, maculopapular, cutaneous, widespread rash?

Answer 13

Secondary syphilis

*4-10 weeks after initial infection

Question 14

Which stage of syphilis may present as cardiac complications, ocular lesions, tongue lesions, gum or other intramural lesions?

Answer 14

Tertiary syphilis

*Gumma is scattered foci of granulomatous inflammation

Question 15

What 3 things make up hutchinson triad?

Answer 15

1-Hutchinsons incisors
2-Ocular interstitial keratitis
3-8th nerve deafness

*associated with congenital syphilis

Question 16

What infectious disease is the most common in the US, is passed sexually and has purulent discharge and dysuria?

Answer 16

Gonorrhea

*caused by neisseria gonnorhea

Question 17

What disease is caused by acid fast bacilli mycobacterium tuberculosis?

Answer 17

Tuberculosis

Question 18

What is it called when TB infects the skin?

Answer 18

Lupus Vulgaris

Question 19

What form of mycobacterial infection is caused by drinking contaminated milk?

Answer 19

Scrofula

Question 20

Granulomas with central areas of necrosis is histologically typical of what?

Answer 20

Tuberculosis

Question 21

Which disease is caused by mycobacterium leprae?

Answer 21

Leprosy

*endemic areas of lousiana and texas

Question 22

What are the two main categories of tuberculosis?

Answer 22

1-Tuberculoid leprosy (paucibacillary-small number of skin lesions)
2-Lepromatous leprosy (multibacillary-loss of hair, collapsed nose)

Question 23

Which polymicrobial disease is rapidly progressive and associated with measles?

Answer 23

Noma

*Frequently begins as NUG and causes zones of necrosis

Question 24

Noma is caused by what two organisms?

Answer 24

1-Fusobacterium necrophorum

2-prevotella intermedia

Question 25

What condition is characterized by external sinus tract with yellow surfer granules?

Answer 25

Actinomycosis caused by Actinomyces israelii

Question 26

Which disease is caused by bartonella henselae?

Answer 26

Car-Scratch disease

*80% in younger than 21

Question 27

What is oculoglandular syndrome of Parinaud?

Answer 27

Primary lesions adjacent to eye that can result in a conjunctival granuloma with preauricular lymphadenopathy

Question 28

What is usually caused by blockage of the ostiomeatal complex?

Answer 28

Sinusitis

Question 29

Calcifications occuring in chronic sinusitis are called?

Answer 29

antroliths

Question 30

How will maxillary sinusitis present in a radiograph?

Answer 30

Sinus is cloudy

Question 31

If a patients tooth pain increases when upright and decreases when supine, it is likely?

Answer 31

Maxillary sinusitis