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Microbiology 2
Step 1 Review: Legionella, TB and more
40
Biology
Graduate
12/22/2007

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Cards

Term
What is most at risk for Legionella?
Definition
The elderly and immunosuppressed
Term
Patholgenesis of Legionella?
Definition

1.  inhaled

2.  Engulfed by macrophage

3.  Survives and proliferates in phagosome

4.  Infected macrophages secretes chemattractants

Term
Treatment of mycobacterium leprae
Definition

T. Leprosy:

1.  Dapsone + rifampin for 6 months

 

L. Leprosy:

1.  Dapsone + Clofazimine for 2 yrs

Term
Clinical Presentation & diagnosis of Lepromatous leprosy
Definition

Grows on Low Temp areas of skin 

Presents:

1. Inflammation damage at skin, nerves and testes

2.  Sensory loss

3.  Lose nasal bone and septum

 

Diagnosis

1.  Ziehl-Neelsen stain

Term
Clinical Presentation & diagnosis of Tuberculoid leprosy
Definition

Grows on low temperature areas of skin 

1.  Flatten plaques on the face, trunk and limbs

2.  PN invasion

3.  Slow progression & healing

4.  Localizes to superficial nerves leading to thicken nerves 

5.  Non-contagious 

 

Diagnosis:

Biopsy of plaques

Term
What's unqiue about the cell wall of mycobacterium?
Definition
Cell wall has acetylmuramic acid instead of N-glycolylmuramic acid
Term
Treatment of TB
Definition

RIPES:

1.  Rifampin

2.  Isoniazid

3.  Pyrazinadmide

4.  Ethambuol

5.  Streptomycin

Term
Symptoms of Reactivated TB
Definition

Immunosuppressed

1.  Persistent cough, fever, night sweats, loss of weight, tiredness

2.  CXR:  Cavities in the upper lobe (aerophilic)

3.  Can disseminate

Term
How does Primary TB present?
Definition

1.  Can by asymptomatic or fever & maliase

2.  Infiltrates in lower lobes of lung

3.  Ghon complex (Calcified tubercles w/ lymph nodes)

 

Term
Distinguish M. tuberculosis from M. leprae biochemically
Definition
M. Leprae grows at low temperatures
Term
Symptoms of legionella
Definition

1.  Pontiac fever:  Flu like

2.  Legionnaires disease:  microabscesses seen on CXR

Term
Charcteristics of Chlamydia
         
Definition

1.  Gram (-) intracellular bacteria

2.  Infectious elementary body

 

Term
What disease does C. trachomatis (A-C) cause?
Definition

1.  Urethritis

2.  PID 

Term
C. trachmatis (A-C) is the number one cause of what?
Definition
Blindness via corneal scarring
Term
Treatment of C. trachmatis
Definition

1.  Deoxycycline

2.  Azithromycin 

Term
What does C. trachmatis (L1-L3) cause and it's description?
Definition

1.  Lymphogranuloma Venereum

2.  Painless papules that lead to swelling & tenderness of lymph nodes

3.  Can lead to elephantiasis 

Term
How is C. trachomatis (L1-L3) contracted?
Definition
STD
Term
What does C. trachomatis increase the risk of due to PID?
Definition
Ectopic pregnancy
Term
Symptoms of C. trachmatis (L1-L3)
Definition

Women:

1.  Vaginal discharge

2.  RUQ ab. pain

3.  No organism on gram stain 

Term
Chlamydia replicates where?
Definition
Inclusion bodies
Term

From were does  Chlaymdia gets it's energy from?

Definition
Host ATP
Term
What disease does C. psittaci cause?
Definition
Atypical pneumonia
Term
How does one get C. psittaci?
Definition
Inhaling feces from infected birds
Term
What disease can C. pneumoniae cause?
Definition
Atypical pneumonia
Term
What are the symptoms of Atypical pneumonia?
Definition

1.  Nonproductive cough

2.  Fever

3.  Sore throat

4.  CXR is patchy and anatomically confined 

Term
Clincial Presentation of Treponema palldium
Definition
Primary Syphilis:  Painless Chancre
Secondary:  Maculopapular rash on palms & soles
Tiertary:  Gummas "granulomas soft tissue" 
Term
Where does Rickettsia replicate?
Definition
In the cytoplasm
Term
What disease does Rickettsia rickettsii cause? 
What are it's symptoms
Definition

Rocky Mountain spotted fever

1.  Fever, headache

2.  Maculopapular rash first on the plams & soles and then the trunk

 

Term
Where are you more likely to contract Rocky Mountain Spotted Fever?
Definition
U.S. southern appalachian by ticks
Term
What to you treat Rocky mountain spotted fever?
Definition
Tetracycline & Chloramphenicol
think "Ricki TiCki"
Term
What does R. rowazeki cause and it's symptoms
Definition

Epidemic Typhus

1.  Fever, headache, chills, malaise

2.  Rash starting on the trunk spreading out to the palms and soles 

Term
How do you contract Epidemic Typhus?
Definition

Poor living conditions and sanitation

1.  Transmitted by body louse 

Term
What does R. typhi cause?  what are it's symptoms?
Definition

Endoemic Typhus

1.  Fever, headache, maculopapular rash 

Term
What disease does Coxiella burnetti cause?  what are it's symptoms
Definition
Q fever
1.  Fever, incubation, chills, headache
Term
How is Q fever transmitted?
Definition

Cattle

1.  Shed in feces

2.  Survives as a spore

3.  Spore is inhaled 

Term
What organisms are the common causes of Atypical pneumonia?
Definition

Mycoplasm

Legionella

Chlaymdia

Viruses 

 

Term
What's the common cause of pneumonia in adults?
Definition

Mycoplasm

C. pneumoniae

S. pneumoniae 

Term
How is Lyme disease transmitted?
Definition
Borreila burgdorferi is transferred from mice to human via tick
Term
Name the 3 stages of lyme disease?
Definition

Stage 1

Erthema chronicum migrams:  Red surrounding a clear bite mark

 

Stage 2

Disseminated spirochetes proliferate leads to damages to CNS, heart

 

Stage 3

Inflammatory damage to joints, brain 

Term
What's the treatment for lyme diesase?
Definition
Doxycycline and for later stagesc ceftriaxone
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