Microbiology 226
Microbiology 226 Final Exam
Questions and Answers
What is Exanthem - A skin rash that arises from a different site of infection
What is enanthem - A mucus membrane rash that arises from a different site of infection
What bacteria(s) causes Impetigo? - Staphylococcus aureus - most times
Streptococcus pyogenes - sometimes
What are the characteristics of Staphylococcus aureus? - 1. its gram (+)
2. cocci = form grape-like clusters
3. yellow pigmentation
4. coagulase (+)
5. CATALASE (+)
How does the bacteria for impetigo spread? - it is spread through direct contact (either
person or fomite)
What are the symptoms/signs of impetigo? - 1. Isolated pustules on the face, nose, mouth
2. the pustules rupture and crust over
What is the reservoir for impetigo? - the nose and throat of humans (both strep. and
staph.)
How do you treat impetigo? - Topical antibiotics
Microbiology 226
,Microbiology 226
What bacteria(s) cause Toxic Shock syndrome? - 1. Staph. aureus
2. Strep. pyogenes
What are the symptoms of toxic shock? - 1. sunburn like rash (peeling skin)
2. Fever
3. vomiting
4. shock
5. organ failure
How can TSS be contracted? (MOT - mode of transmission) - 1. An unaffected person
can not get it from someone who has TSS
2. It can become pathogenic as it lives in the respiratory tract
3. The bacteria can be contracted via surgical instruments or tampons
** you can't spread TSS only the bacteria that causes it **
What is thr reservoir for the bacteria that causes TSS? - The nasal and throat passageways
How can TSS be treated? - 1. Antibiotics
What disease is also called "school sores"? - impetigo
**it is very common in young children
What pathogen causes necrotizing fasciitus aka "flesh eating bacteria"? - Strep. pyogenes
Microbiology 226
,Microbiology 226
What hemolytic property does the bacteria that causes necrotizing fasciitus have? - it is a
Group A Strep. (GAS)
- Beta hemolytic (complete breakdown)
What kind of impetigo happens in babies. It is characterized by large red blisters all over
the body - Bollous Impetigo
What pathogen causes erisypelas? - Streptococcus pyogenes
How is erisypelas transmitted? - it is an endogenous infection that affects the dermal
layer
What does the rash look like for erisypelas? - Bright red patches with raised margins on
the face to start
What disease does erysipelas usually occur after? - Strept. throat
Is erysipelas associated with a high fever? - yes
What toxin does the bacteria that cause necrotizing fasciitis possess? - Endotoxin A -->
superantigen
What are the characteristics of psuedomonos aeruginosa? - 1. Gram - R
2. Spread in dirt and water
3. oppurtunistic
Microbiology 226
, Microbiology 226
What bacteria causes aka Otitis externa swimmers ear? - psuedomonas aeruginosa
What is the portal for swimmer's ear? - the ear
What are the symptoms of swimmers ear? - it is an external ear infection
What does the papillomavirus cause? - warts
How are warts contracted? - - direct contact
- sexual contact
What is the reservoir for the papillomavirus? - humans
How can you treat warts? - 1. cryotherapy
2. electrodissection
3. burn w/ acids or chemicals
Is the incubation period for the papillomavirus long or short? - long - several weeks
What can genital warts lead to? - cervical cancer
What kind of rash is smallpox (macular or vesicular?)? - it is vesicular
How does smallpox spread? - aerosol
Microbiology 226
Microbiology 226 Final Exam
Questions and Answers
What is Exanthem - A skin rash that arises from a different site of infection
What is enanthem - A mucus membrane rash that arises from a different site of infection
What bacteria(s) causes Impetigo? - Staphylococcus aureus - most times
Streptococcus pyogenes - sometimes
What are the characteristics of Staphylococcus aureus? - 1. its gram (+)
2. cocci = form grape-like clusters
3. yellow pigmentation
4. coagulase (+)
5. CATALASE (+)
How does the bacteria for impetigo spread? - it is spread through direct contact (either
person or fomite)
What are the symptoms/signs of impetigo? - 1. Isolated pustules on the face, nose, mouth
2. the pustules rupture and crust over
What is the reservoir for impetigo? - the nose and throat of humans (both strep. and
staph.)
How do you treat impetigo? - Topical antibiotics
Microbiology 226
,Microbiology 226
What bacteria(s) cause Toxic Shock syndrome? - 1. Staph. aureus
2. Strep. pyogenes
What are the symptoms of toxic shock? - 1. sunburn like rash (peeling skin)
2. Fever
3. vomiting
4. shock
5. organ failure
How can TSS be contracted? (MOT - mode of transmission) - 1. An unaffected person
can not get it from someone who has TSS
2. It can become pathogenic as it lives in the respiratory tract
3. The bacteria can be contracted via surgical instruments or tampons
** you can't spread TSS only the bacteria that causes it **
What is thr reservoir for the bacteria that causes TSS? - The nasal and throat passageways
How can TSS be treated? - 1. Antibiotics
What disease is also called "school sores"? - impetigo
**it is very common in young children
What pathogen causes necrotizing fasciitus aka "flesh eating bacteria"? - Strep. pyogenes
Microbiology 226
,Microbiology 226
What hemolytic property does the bacteria that causes necrotizing fasciitus have? - it is a
Group A Strep. (GAS)
- Beta hemolytic (complete breakdown)
What kind of impetigo happens in babies. It is characterized by large red blisters all over
the body - Bollous Impetigo
What pathogen causes erisypelas? - Streptococcus pyogenes
How is erisypelas transmitted? - it is an endogenous infection that affects the dermal
layer
What does the rash look like for erisypelas? - Bright red patches with raised margins on
the face to start
What disease does erysipelas usually occur after? - Strept. throat
Is erysipelas associated with a high fever? - yes
What toxin does the bacteria that cause necrotizing fasciitis possess? - Endotoxin A -->
superantigen
What are the characteristics of psuedomonos aeruginosa? - 1. Gram - R
2. Spread in dirt and water
3. oppurtunistic
Microbiology 226
, Microbiology 226
What bacteria causes aka Otitis externa swimmers ear? - psuedomonas aeruginosa
What is the portal for swimmer's ear? - the ear
What are the symptoms of swimmers ear? - it is an external ear infection
What does the papillomavirus cause? - warts
How are warts contracted? - - direct contact
- sexual contact
What is the reservoir for the papillomavirus? - humans
How can you treat warts? - 1. cryotherapy
2. electrodissection
3. burn w/ acids or chemicals
Is the incubation period for the papillomavirus long or short? - long - several weeks
What can genital warts lead to? - cervical cancer
What kind of rash is smallpox (macular or vesicular?)? - it is vesicular
How does smallpox spread? - aerosol
Microbiology 226
