Lower Respiratory Tract Infections in Adults Flashcards
Upper respiratory tract infections are infections which occur above what?
Vocal cords
What is the inflammation of the trachea called?
Tracheitis
Which part of the lungs does pneumonia involve?
Parenchyma of the lungs
->alveoli and base units of the lungs
Define acute bronchitis.
Inflammation of the lungs
How long does acute bronchitis last?
Temporary so <3 weeks
What are some of the presenting symptoms of acute bronchitis?
Cough and sputum
What is the difference between acute and chronic bronchitis?
Acute- cough is temporary, <3 weeks
Chronic- often seen in those with COPD, having a cough for three months of the year for at least two years in a row.
What type of infection of acute bronchitis usually?
Viral
Describe the management of acute bronchitis.
Supportive management
->lots of fluids
->paracetamol
List some unusual symptoms which would require the individual to see their GP.
- cough is severe or lasts longer than 3 weeks
- high temperature for more than 3 days
–may be a sign of flu or a more serious condition, like pneumonia - cough up mucus streaked with blood
- underlying heart or lung condition, such as asthma, heart failure or emphysema
- more breathless
- repeated episodes of bronchitis
Name some presenting symptoms of someone with an exacerbation of COPD.
- Change in colour of sputum
- Fevers
- Increased breathlessness
- Wheeze (worse)
- Cough (worse)
Name the three common bacteria which cause COPD exacerbation.
- Streptococcus pneumoniae
- Haemophilus influenzae
- Moraxella catarrhalis
Name some antibiotics which can treat an exacerbation of COPD.
-amoxicillin
- doxycycline
- co-trimoxazole
- clarithromycin
Other than antibiotics, what treatment can be given for an exacerbation of COPD?
Steroids
Nebulisers
Define pneumonnia.
Inflammation of lung parenchyma
How many people with acute bronchitis then go on to develop pneumonia?
1 in 20
What are some of the risk factors for developing pneumonia?
*Smoking, alcohol in excess
* Extremes of age (very young and very old)
* Preceding viral illness
* Pre-existing lung disease
* Chronic illness
* Immunocompromised
* Hospitalisation
* IVDU (IV drug abusers)
Name three types of pneumonia.
Bronchopneumonia
Lobar pneumonia
Interstitial pneumonia
Define bronchopneumonia.
Inflammation of the alveoli
Define lobar pneumonia
Infection in which the air sacs fill with pus and other liquid.
Define interstitial pneumonia.
Rare disorder that affects the tissue that surrounds and separates the tiny air sacs of the lungs.
Describe how bronchopneumonia affects the lung.
Usually affects one lung in patches
Describe how lobar pneumonia affects the lung.
Causes consolidation of an entire lobe of the lung.
Define consolidation.
Solidification due to cellular exudate in alveoli leads to impaired gas exchange
Which preceding viral illness can lead to pneumonia?
Flu
List some of the clinical symptoms of pneumonia.
*Fever, rigors, myalgia
* Cough and sputum
* Chest pain (pleuritic)
* Dyspnoea
* Haemoptysis- rare but red flag
List some of the clinical signs of pneumonia.
- Tachypnoea
- Tachycardia
- Reduced expansion
- Dull percussion
- Bronchial breathing
- Crepitations
- Vocal resonance increase
What is the normal body temp range?
37 degrees +/- 0.6 degree
Define rigors
Shivers
Define myalgia
Muscle pain
What is meant by pleuritic chest pain?
Pain upon deep inspiration
What bacteria can cause brown, rusty looking sputum?
Streptococcus pneumoniae
Define Tachypnoea
Rapid breathing
Define Tachycardia
HR > 90bpm
Define Crepitations
Rattling sounds
What investigations could be done in someone w suspected pneumonia in a community setting?
Nothing really
Chest x-ray sometimes used
What investigations could be done in someone w suspected pneumonia in a hospital setting?
Bloods – serum biochemistry, FBC, CRP
Blood cultures
Chest x-ray
Sputum culture, viral throat swab
Legionella urinary antigen
List some of the differential diagnoses of pneumonia
- TB
- Lung cancer
- Pulmonary embolism
- Pulmonary oedema
- Pulmonary vasculitis
Which bacteria is the most common cause of pneumonia?
Strep Pneumoniae
Name some typical community acquired organisms which cause pneumonia
- Streptococcus pneumoniae
- Haemophilus influenzae
- Mycoplasma pneumoniae
Name some atypical community acquired organisms which cause pneumonia
- Legionella pneumophilia
- Chlamydia pneumoniae
- Chlamydia psittaci
- Coxiella burnetti
- Moraxella catarrhalis
- Viruses
im sorry, write them out a few times
Which bacteria causes pneumonia and brings about extrapulmonary complication?
Mycoplasma pneumoniae
Name some of the symptoms you would get with pneumonia from an atypical community acquired organism
Dry cough
Less sputum
General fatigue
Headache
Muscle aches
Where does Legionella pneumophilia tend to accumulate?
Fresh water
Around air conditioning
Chlamydia pneumoniae is more common in patients with what?
Coronary artery disease
What is Chlamydia psittaci associated with?
Birds
What is Coxiella burnetti associated with?
Farm animals
What is Moraxella catarrhalis associated with?
Can infect people w COPD
Name some viruses which can cause pneumonia.
Influenza, RSV, SARS, varicella
Name some of the bacteria which can cause hospital acquired pneumonia.
- Enterobacteria
- Staphylococcus aureus
- Pseudomonas aerigunosa
- Klebsiella pneumoniae
Which bacteria (causing hospital acquired pneumonia) can cause the patient to produce very green sputum?
Pseudomonas aerigunosa
Pseudomonas aerigunosa usually affects people with what underlying condition?
Lung disease
Which organisms can cause cavitation pneumonia?
- Staphylococcus aureus
- Klebsiella pneumoniae
*TB
What scoring system is used in those with pneumonia?
CURB 65
Discuss CURB 65
C =confusion
U =blood urea >7mmol/l
R = RR> 30bpm
B = systolic BP < 90 mmHg, diastolic blood pressure < 60mmHg
65= aged 65 or above
What does a score 0-1 of CURB 65 tell us?
Low risk - could be treated in community
What does a score 2 of CURB 65 tell us?
Moderate risk - hospital treatment usually required
What does a score 3-5 of CURB 65 tell us?
High risk of death and need for ITU
Why should we be wary in using CURB 65 in young people?
Symptoms may be missed out and they could still have pneumonia-
- Hypoxia
- Multi-lobar consolidation
What is the risk of death % for those who score 0-1 on CURB 65?
<3%
What is the risk of death % for those who score 2 on CURB 65?
9%
What is the risk of death % for those who score 3-5 on CURB 65?
15-40%
Describe the treatment for those with a 0-1 CURB 65 score.
-Amoxicillin
-Clarithromycin or doxycycline if penicillin allergy
-5 days duration
Describe the treatment for those with a 2 CURB 65 score.
-Amoxicillin and clarithromycin (atypical)
-Levofloxacin if penicillin allergy
-5-7 days duration
Describe the treatment for those with a 3-5 CURB 65 score.
-Co-amoxiclav + clarithromycin (atypicals)
-Levofloxacin or co-trimoxazole if penicillin allergy
-7-10 days duration
Name some supportive management options for those with pneumonia.
Oxygen, fluids (IV or oral)
Antipyretics, NSAIDs
Intubation and ventilation
What bacterial infection can influenza lead to?
Staphylococcus aureus secondary infection
Aspiration pneumonia tends to occur in conditions where people cannot swallow properly.
Give some examples of conditions in which aspiration pneumonia will also occur.
Stroke, MS, myasthenia, sedation, oesophageal disease
What treatment would you five for those w aspiration pneumonia and why?
Amoxicillin + metronidazole as likely to be anaerobic infections
Immunocompromised patients with pneumonia are may also develop which organisms?
-Fungi – aspergillus fumigatus, candida…
-` Viruses – CMV, HSV, VZV…
What is MRSA and how can you treat it?
Methicillin-resistant Staphylococcus Aureus
Usually found is hospitals
Vancomycin
List some complications of pneumonia.
- Sepsis
- Acute Kidney Injury
- Adult Respiratory Distress Syndrome
- Parapneumonic effusion
- Empyema
- Lung Abscess
- Disseminated infection
Define empyema.
Pockets of pus (lungs in this case)
What are some signs that somebody could have complications with their pneumonia?
- Swinging fever
- Sweats
- Persistently high WCC / CRP
- Weight loss
-Failure to improve
What investigation would be carried out to diagnose Parapneumonic Effusion / Empyema?
Chest x-ray
Thoracic ultrasound +/- aspirate (needle to draw out fluid)
Describe how we can tell if it is a simple effusion.
pH>7.2
Describe how we can tell if it is a complicated effusion.
pH <7.2
Describe how we can tell if it is a empyema.
Pus
Culture positive
What are some of the treatments/ managements for those with Parapneumonic Effusion / Empyema?
May need drain + prolonged antibiotics
May need surgery
Lung abscesses are more likely to occur with which bacteria?
Staph aureus, pseudomonas, anaerobes
What are some presenting symptoms for those w a lung abscess?
Purulent sputum
Haemoptysis
Which investigations may be carried out in someone w a lung abscess?
CT scan +/- bronchoscopy
What is the treatment for a lung abscess?
Prolonged antibiotics.
How long does recovery from pneumonia take?
Weeks
What recommendations can be made to those with pneumonia?
Stop smoking
If a patient w pneumonia is a smoker and over 50, what should you do?
Repeat chest x-ray after six weeks
What happens in Bronchiectasis?
Dilated distal bronchi which produce a lot of sputum
What are some causes of bronchiectasis?
Usually no cause- idiopathic
Childhood infection
Cystic fibrosis
What are the main symptoms of bronchiectasis?
Chronic productive cough
* Breathlessness
* Recurrent LRTI
* Haemoptysis
In those with bronchiectasis, what might you see upon examination?
*Finger clubbing
* Crepitations (coarse)
* Wheeze
* Obstructive spirometry
Which bacteria may cause an infective exacerbation of bronchiectasis?
o Staph aureus
o Haemophilus influenzae
o Pseudomonas aerigunosa
What treatments can be given to those with an infective exacerbation of bronchiectasis?
o Sputum Cx essential (including AAFB)
o Chest physio
o Mucolytics
o Prolonged antibiotic course 10-14 days
o Vaccinations