Pneumonia Flashcards
Influenza etiology
Influenza virus: Type A & B
Type A subtypes
- Hemagglutinins H1, H2, H3
2. Neuraminidases N1, N2
Influenza clinical presentation
FACTS: F-Fever A-Aches C-Chills T- Tiredness S-Sudden onset
What is the gold standard diagnostic test for influenza? Why?
Viral Culture
Higher SENSITIVITY
Indications for antiviral treatment
- Illness requiring hospitalization
- Progressive, severe or complicated illness
- High risk complications
What are we worried about in children <19 y.o. on chronic ASA therapy? (high risk group)
Rye syndrome
List Antiviral medication and what strain it covers
Neuraminidase Inhibitors
-Oseltamivir (Tamiflu)
Influenza A/B
What antiviral medication is NOT recommended for use in the US?
Adamantanes
Zanamivir (Relexna) side effects and contraindications
ADE: Bronchospasm
Contraindicated: Respiratory dz
When must you initiate antiviral treatment to see benefit?
24-48 hrs
Relieve sx’s up to 3 days earlier
Less severe sx’s
What is the number one complication of influenza?
Pneumonia
Who should receive the influenza vaccine?
Universal vaccination >6 months
Who is the influenza vaccine contraindicate in?
Previous severe reaction to flu vaccine
How many doses do pediatric patients receive the first time the get the influenza vaccine?
2 doses
What is the most common cause of acute bronchitis?
Viral
What is the only bacterial organism that requires treatment in acute bronchitis?
Bordetella pertussis
What is the most common sx in acute bronchitis?
Cough >5 days
Acute bronchitis PEx
- Wheezing
- Rhonchi that clears with coughing
- Negative for rales and any signs of consolidation
When is a CXR indicated in suspected acute bronchitis?
Fever- R/O pneumonia
What is the most common cause for overly prescribed abx?
Acute bronchitis=60-90%
What is another name for Pertussis?
Whooping cough
What causes Pertussis?
Bordetella pertussis
Bordetella pertussis
MOA
- Releases toxin that damages cilia and causes airways to swell
- Causes classic cough
What population do we see Bordetella pertussis in?
< age 2 y/o
Bordetella pertussis incubation period
7-17 days
How long are you contagious for after onset of cough in pertussis?
2 week s
What are the 3 stages of Pertussis and time periods?
- Catarrhal: 1-2 weeks
- Paroxysmal: begins in 2nd week, last 2-3 mos.
- Convalescent: 1-2 weeks
Catarrhal sx’s
- Malaise
- Rhinorrhea
- Cough
- Cough
- Lacrimation and conjunctival injection
Paroxysmal sx’s
- Fits of numerous, rapid cough followed by “Whooping” sound
- Vomiting following coughing
Convalescent sx’s
Gradual reduction in frequency and severity of cough
Pertussis diagnosis
Nasopharyngeal culture
Pertussis treatment
- Macrolide
2. Bactrim
When should pregnant women receive their Tdap?
27-36 weeks gestation
At what age do adolescents receive their Tdap booster?
11-18 y.o.
What are the complication os pertussis in babies under 1 y/o?
- Hospitalization=50%
- Pneumonia=23%
- Apnea=61%
What is the most common form of transmission of pneumonia?
Aspiration from the oropharynx
What is the most common pneumonia?
Community Acquired Pneumonia
What is the most common bacterial infection of CAP?
S. pneumoniae
List Atypical bacteria in CAP
- Mycoplasma pneumoniae
- Legionella
- Chamydophilia
Viral causes of CAP
Influenza
CAP clinical presentation
- Fever
- Cough
- Dyspnea
- Chest discomfort
- Fatigue, weakness
- Myalgias, arthralgia
CAP physical exam findings
- Fever
- Rales
- Signs of consolidation
- Tachypnea
- Tachycardia
- Low O2 sat
What is another name for Mycoplasma Pneumoniae? What age group does it commonly occur in?
“Walking pneumonia”
Children and adolescents
Legionella presentation
- GI disorders: Watery diarrhea
- From contaminated water sources
What organism has a usual complaint of “sudden onset of a single episode of rigors or chills”
S. pneumoniae
Klebsiella pneumoniae
presentation
- Currant jelly sputum
- Alcoholics, DM, COPD
What is the gold standard diagnostics for CAP?
CXR
What would you expect to see on CBC in pneumonia?
Leukocytosis with left shift
CXR findings
- Lobar- One lobe consolidation
- Interstitial- patchy distribution
- Cavitation
What organism would you use a urine antigen test?
S. pneumonia
Legionella
What does Procalcitonin levels help you determine?
bacterial vs. viral
CURB 65
C-Confusion
U- Urea >7 mol/L (BUN>20)
R-Respiratory Rate >30
B- Blood pressure, SBP<90 OR DBP < or equal to 60
65- Age> or equal 65
CURB 65 score 0-1
Treat outpatient
CURB 65 score 2
Admit
CURB 65 score 3-5
Assess for ICU
Who needs a follow-up CXR following abx treatment?
Smokers
Abx treatment for outpatient and no abx in last 3 months
- Macrolide OR
2. Doxycyline
Abx treatment for outpatient with:
abx in last 3 months
Macrolide resistant S.pneumoniae
- Respiratory Fluoroquinolone OR
2. Beta-Lactam + Macrolide
Abx treatment for Inpatient, Non-ICU
- Respiratory Fluoroquinolone OR
2. Beta-Lactam + Macrolide
Abx treatment for ICU patients
Anti-pneumococcal beta-lactam PLUS:
- azithromycin OR
- respiratory fluoroquinolone
Abx treatment for ICU patients with PCN allergy
respiratory fluoroquinolone + aztreonam
CAP treatment if pseudomonas risk
Antipneumococcal, antipseudomonal beta lactam*
+
ciprofloxacin or levofloxacin (750 mg)
Duration of inpatient treatment
Minimum of 5 days and:
- Afebrile for 48-72 hours
- Supplemental O2 not needed
- Heart rate < 100
- RR < 24
- SBP ≥ 90 mm Hg
List CAP Vaccination Prevention
- Influenza- All
- PPSV23 (Pneumovax)- Adults > 65 y.o.
- PCV13 (Prevnar)- All <2 y.o.
Hospital Acquired Pneumonia (Nosocomial) Definition
- 48 hours or more after admission
- Did NOT appear to be incubating at the time of admission
Ventilator Associated Pneumonia definition
- type of HAP
- Develops more than 48 – 72 hours after endotracheal intubation
Etiology of HAP and VAP
- Aerobic gram-negative bacilli: E.coli, Klebsiella, enterobacter, pseudomonas aeruginosa
- Gram (+): S. aureus, Strept.
HAP and VAP diagnosis
New lung infiltrate + evidence that the infiltrate is of infectious origin:
- New onset of fever
- Purulent sputum
- Leukocytosis
- Decline in oxygenation
Duration of treatment in HAP/VAP
14-21 days
7 days if responding to tx
What organism ALWAYS gets the full 14-21 days of tx?
Pseudomonas aeruginosa
Best treatment of VAP
Prevention!
- Avoidance of acid-blocking meds
- Decontamination of oropharynx
What is a common complication of viral pneumonia?
Secondary bacterial pneumonia= STAPH!
What is the most common opportunistic infection in AIDS pt’s?
Pneumocystis jirovecii (Pneumocystis carinii, ‘PCP’) -Atypical Fungi
Pneumocystis pneumonia treatment
TMP-SMX (Bactrim) x 21 days
+/- corticosteroids based on severity
Prophylaxis Pneumocystis pneumonia Tx for AIDS pt’s
CD4 count < 200
TMP-SMX (bactrim)
Organism that cause Aspiration Pneumonia
- Gram (-)
2. Anaerobic pathogens
Aspiration Pneumonia clinical présentation
Cough with foul smelling purulence
Poor dentition
How do you obtain a culture for Aspiration Pneumonia
- Transthoracic aspiration
- Thoracentesis
- Bronchoscopy
What is a common CXR findings in Aspiration pneumonia?
RLL infiltrate
Aspiration pneumonia abx treatment
Clindamycin or amoxicillin-clavulanate (Augmentin)