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113 Cards in this Set
- Front
- Back
Most common cause of acute bronchitis
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Viral
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Bacterial causes of acute bronchitis
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S. pneumoniae
H.influenzae C.pneumoniae M.pneumoniae B.pertussis |
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Bacterial agents of chronic bronchitis
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S.pneumoniae
H.influenzae M. catarrhalis |
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_ can exacerbate symptoms of chronic bronchitis
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Viruses
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Necrotizing pneumonia with cavitation and destruction of lung parenchyma
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Lung abscess
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Involves invasion of lung interstitium
Typical of viral pneumonia |
Interstitial pneumonia
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More diffuse patchy consolidation - what type of pneumonia
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Bronchopneumonia
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Involvement of distinct region of lung - type of pneumonia
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Lobar
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This type of pneumonia produced by pyogenic bacteria living in nasopharynx
Which bacteria most commonly caused it? |
Typical
S.pneumoniae |
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Type of pneumonia that is caused by organisms inhaled from environment not apparent on gram stain
Which organism most common? |
Atypical
Mycoplasma pneumoniae |
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Patient presents with dyspnea, pleuritic chest pain, purulent cough, fever and shaking chills, he produces RUSTY SPUTUM - what type of pneumonia
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Typical pneumonia
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Patient presents with pneumonia, has less abrupt onset, cough is unproductive, no pleuritic pain, had flu like symptoms for past 2 weeks - what type of pneumonia
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Atypical pneumonia
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Which organisms usually cause aspiration pneumonia
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ANAEROBIC
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Which type of pneumonia is characterized by foul smell
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Aspiration (anaerobic) pneumonia
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#1 cause of community acquired pneumonia
#2? #3 ? |
STREP PNEUMONIA
Mycoplasma pneumonia Chlamydia pneumonia |
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Which organisms are common causes of pneumonia following influenza
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S pneumonia
S aureus H influenza |
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Nosocomial infections occur _ after hospitalization
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72 hours
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People who are at high risk (ICU, ventillation) usually caused pneumonia by _
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Pseudomonas aeruginosa
Multidrug resistant gram negative rods |
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What type of pneumonia is caused by Strep Pneumonia
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Typical pneumonia
Lobar pneumonia |
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Which patients are at higher risk for Strep Pneumonia caused pneumonia
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SICKLE CELL PATIENTS
Asplenic Alcoholics Poverty Debilitated health |
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Main virulence factor of Strep Pneumonia
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CAPSULE
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_ vaccine recommended for elderly against Strep Pneumonia, against 23 most common serotypes
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Polysaccharide vaccine
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_ vaccine recommended for ages 2 months to 23 months, against 7 serotypes, reduces incidence of invasive pneumococcal disease, pneumonia and otitis media
24-59 months targeted to children at risk |
Conjugate vaccine
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Patient presents with symptoms of rapid onset, she had single episode of rigor, she complains of chills, fever, dyspnea and cough productive of rusty sputum - chest x ray shows lobar pneumonia - which organism responsible
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Streptococcus pneumonia
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Describe stages of pneumonia
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1st stage - lung alveoli fill with fluid
2nd stage - early consolidation, PMN's 3d stage- late consolidation 4th stage- resolution |
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Alpha hemolytic
Optochin sensitive Bile soluble Quellung reaction |
Strep Pneumonia
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What is the treatment of Strep Pneumonia
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DOC was penicillin but now 1/3 resistant
Multiple drug resistance developing Need multi drug therapy |
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Other than pneumonia, S pneumonia causes _
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Acute sinusitis
Otitis media Bacteremia Often follows viral infections |
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Gram negative rod
Oxidase negative Lactose fermenter Causes pneumonia |
Klebsiella Pneumonia
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65 year old male, alcoholic with positive history for pulmonary deficits has pneumonia, x ray shows cavitary necrotic destruction. He produces current jelly sputum
Whats the organism |
Klebsiella Pneumonia
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Nonfermenter
Gram negative rod Oxidase positive |
Pseudomonas Aeruginosa
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Who is at risk for getting pseudomonas pneumonia
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CYSTIC FIBROSIS
Chronic lung disease Neutropenia |
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Microabscess formation and tissue necrosis
Diffuse bilateral bronchopneumonia Organism? |
Pseudomonas family
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Hospitalized patient is found to have bilateral bronchopneumonia often with radioluscencies
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Pseudomonas Aeruginosa
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This organism causes nosocomial infection, normal patients spread it to cystic fibrosis patients, has long pili to bind to mucous of CF patients, CF patients become ill - very serious infection
Organism? |
Burkholderia cepacia
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Third most frequently isolated non-fermenter gram negative rod
Found in contaminated disinfectant solution, respiratory therapy equipment and ice machines Organism? Treatment? |
Stenotrophomonas maltophilia
Treatment - TMP SXT |
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Slender pleomorphic gram negative rod
Stain poorly with grams stain, use silver stain Fastidiuous grow on buffered charcoal yeast agar, require cysteine in media |
Legionella pneumonia
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This organism can tolerate high temperatures, requires hyper chlorination to eradicate, can be a facultative intracellular parasite for Acanthomoeba, Naegleria, acquired from environment
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Legionella pneumonia
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Where is Legionella most commonly found
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WATER DISTRIBUTION SYSTEMS
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Who is at most risk for Legionella
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Elderly alcoholics, smokers
IMMUNOCOMPROMISED Dialysis patients Chronic underlying disease |
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How do you acquire Legionella
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Inhale infectious particles
Binds complement on surface of monocytes and macrophages ENDOCYTOSED Prevents phagolysosomal fusion |
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How do you diagnose Legionella
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Silver stain
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Can cause CAP or nosocomial pneumonia
Causes atypical pneumonia Onset less explosive than pneumococcal pneumonia Sputum production less than pneumococal Organism? |
Legionella
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65 year old male presents with fever, headache, cough was nonproductive initially, now patient has CNS and GI abnormalities - he has change in mental status, also nausea, vomitting and abdominal pain, he also has BRADYCARDIA - what disease
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Legionnaires disease
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Patient has multi lobar pneumonia with micro abscesses in lungs, he also has multi organ disease and more monocytes than PMN's - what disease
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Legionnaries
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How do you make diagnosis for Legionnaries
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Gram stain - moderate number of PMN's
Buffered charcoarl yeast extract for isolation Antigen detection in urine Direct fluorescent antibody |
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2nd most common cause of Legionella pneumonia, weakly acid fast, mostly nosocomial, MAY PRESENT AS ACUTE PE, common in transplant recipients, hematologic malignancies and steroid use
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Legionella micdadei
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Most common cause of walking pneumonia, can also cause pharyngitis, non purulent otitis media and tracheobronchitis
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Mycoplasma pneumonia
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This is the smallest free living bacteria, it LACKS CELL WALL, it requires sterols for growth
Name bacteria and virulence factor |
Mycoplasma pneumonia
P1 adhesin - binds cilia on epithelial cells, cilistatic, results in PERSISTENT COUGH |
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How is mycoplasma pneumonia transmitted
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Inhalation of droplets - spreads within groups/families
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25 year old female presents with ear pain, bullous myringitis and persistent nonproductive "hacking" cough
Which organism? Treatment? |
Mycoplasma pneumonia
Erythromycin, tetracycline, fluoroquinolones |
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Patient presents with pneumonia - culture of bronchial washings shows strict aerobe, however it is not seen on gram stain but can see many PMN's, organism was isolated on special media with sterols, serology positive for cold agglutinins
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Mycoplasma pneumonia
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Obligate intracellular bacterium, cannot generate own ATP, lacks oxidative enzymes - cant see on gram stain, many PMN's
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Chlamydia pneumonia
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This organism causes pneumonia in elderly, debilitated patients, but also found in helathy individuals, transmission through droplets, associated with atherosclerosis, Alzheimers and asthma
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Chlamydia Pneumonia
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Patient presents with mild pneumonia, he has hoarseness and fever, respiratory symptoms followed few days later, he also has severe pharyngitis
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Chlamydia pneumonia
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Treatment of chlamydia pneumonia
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Macrolides
Tetracycline Levofloxacin |
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Organism responsible for parrot fever
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Chlamydophila psittaci
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This organism is shed in aerosoles, feces and feathers of birds, has abrupt onset, humans inhale aerosols, systemic infection develops, mucous plugs may form (can cut down on airway but not fatal)
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Chlamydia psittaci
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Treatment of psittacosis
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Tetracycline and macrolides
Treat the birds with tetracycline too |
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This organism can cause fatal septicemia - droplets are inhaled from infected individual, carried from lungs by macrophages to lymphatic system, within 24 hours causes pulmonary necrosis, septicemia
Disease |
Pulmonary anthrax
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Patient presents with dyspnea, cyanosis, severe pyrexia, he is disoriented, within hours he develops circulatory failure, shock, goes into coma and dies
Disease? |
Anthrax
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Virulence factors of anthrax
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Capsule
Edema toxin Lethal toxin 2 plasmid requirement |
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Military person presents with edema and widened mediastinum on x ray, gram positive rod with spores is isolated
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Bacillus anthracis
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Causative agent of pneumonic plague
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Yersinia pestis
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How is Yersinia pestis transmitted
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Aerosols
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Patient is 45 year old farmer, develops septicemia and pulmonary hemorrhagic necrosis
Disease, organism |
Tularemia - francisella tularensis
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Obligate intracellular parasite, causes Q fever, member of riccketsia family, endemic to Nova Scotia, rare or underreported in US
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Coxiella burnetti
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This bug is a member of riccketsia family but doesnt cause rash
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Coxiella burnettie
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How do you get Q fever
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Cattle, sheep and goats are primary reservoir
Inhale from aerosols of feces or genital secretion of infected domestic animals May reactivate years later - especially during pregnancy |
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34 year old female presents with systemic illness after visit to a farm 20 days ago. She has rigors, fever, headache, myalgia and nonproductive cough, she also has maculopapular rash, she is also diagnosed with hepatitis, x ray shows patchy infiltrate
Diagnosis |
Q fever
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What can occur in chronic Q fever
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ENDOCARDITIS (especially if previous valvular disease, transplant recipients and immunosuppressed)
Children - bone and joint involvement |
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Cell wall of mycobacteria is 60% _
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Lipid (mycolic acid)
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Who is at risk for TB
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Minorities
HIV Homeless Recent immigrants IVDU |
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47 year old male presents with fatigue, weight loss, fever, night sweats and productive cough. He complains of blood stinged sputum and pleuritic chest pain
Diagnosis |
TB
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How is TB spread
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Droplet spread
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Which cells pick up TB
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Macrophages
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How long for immune response to take place after infection with TB
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3 weeks
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What is the evidence for TB infections
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Positive PPD
Ghon complex on x ray |
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Organized collection of epitheloid cells surrounded by lymphocytes and capillaries
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Granuloma
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What is TB test
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Purified protein derivative
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If patient is at no known risk what should be reaction to PPD
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< or equal to 15 mm
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If patient is at intermediate risk what should be reaction to PPD
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< or equal to 10 mm
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If patient is at high risk what should be reaction to PPD
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5 mm
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What can give you false positive TB test
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Infected with atypical mycobacteria
BCG vaccination |
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HIV patients - what should be reaction to PPD
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Less than 5 mm
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Close contact of person with active TB - what should be PPD
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Less than 5 mm
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Patient has chest x ray suggestive of previous inactive TB - what should be PPD
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Less than 5 mm
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HIV negative IV drug user - what should be PPD
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Less than 10
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Immigrant from Asia - what should be PPD
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Less than 10
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Resident of nursing home/correction facility - what should be PPD
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Less than 10
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Locally identified high prevalence group - what should be PPD
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Less than 10
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Immunosuppressive disease (not HIV) - what should be PPD
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Less than 10
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If person on TB drug is non compliant - what do you need to do?
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DOT - direct observation therapy
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What do you need to have before removing patient with TB from isolation room
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3 negative AFB sputum smears prior to removal
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Which bacteria are part of MAC complex
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M. avium
M. paratuberculosis M intracellulare M leprae |
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TB that causes osteomyelitis is called_
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Potts disease
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Positive HIV patient has productive cough, fever, weight loss, GI symptoms, night sweats but no pneumonia. He has disseminated infection with fever and wasting. PE shows enlargement of liver, spleen, intrabdominal and mediastinal lymph nodes. He has history of chronic diarrhea and abdominal pain
Diagnosis? |
MAC complex infection
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What is MAC treatment
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Clarithromycin
Ethambutol Rifabutin |
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This organism is second to MAC, has highest incidence in midwest and southwest, common in miners, welders and sandblasters, looks like TB
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Mycobacterium kansasii
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Gram positive rod with true branching, STRICT AEROBE, weakly acid fast, opportunistic pathogen
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Nocardia
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Who is at risk for nocardia
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Lymphoma
Leukemia Solid tumors Organ tumors Organ transplants AIDS Children with CGD |
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Patient presents with confluent necrotizing bronchopneumonia, CAVITIES ARE PRODUCED. He complains of cough, dyspnea and fever
Organism? |
Nocardia
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Current or recent pneumonia with cavities on x ray - what should you think first
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Nocardia
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Organism was grown on charcoal buffered yeast extract, gram stain shows gram positive rod with branching
Organism? |
Nocardia
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Looks like star on blood agar
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N asteroides
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How do you treat Nocardia infections
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Sulfonamides
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This organism is aerobic actinomycete, it is similar to Nocardia and is an opportunistic pathogen
ASSOCIATED WITH SEVERELY IMMUNOCOMPROMISED PEOPLE ESPECIALLY IF EXPOSED TO HORSES |
Rhodococcus
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Alcohol and smoking inhibit this protective mechanism of upper respiratory tract
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Mucociliary elevator
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2 most common URT infections in adults
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Sinus infections
Chronic sinusitis |
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2 most common URT infections in kids
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Pharyngitis
Acute otitis media |
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ONLY pharyngiits that requires treatment
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Strep pyogenes
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This type of pharyngitis occurs in winter, early spring, in children, has abrupt onset, fever, sore throat with exudate and petechiae on palate
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Streptococcal
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This type of pharyngitis occurs all year long, at all ages, patient has cold like symptoms, absence of fever, mild sore throat
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Viral
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