Respiratory disease Flashcards
What are the causes of glandular fever/infectious mononucleosis?
1) EBV (90% of cases)
2) CMV
What is the HxPC in glandular fever?
1) Exudative pharyngitis
2) Generalised, tender, lymphadenopathy
3) Lethargy
4) Widespread erythematous macular rash
5) Hepatosplenomegaly
What is the classic triad for Dx of glandular fever?
1) Lymphocytosis
2) >/=10% atypical lymphocytes on peripheral blood film
3) +ve serology for EBV
What investigation may be used to Dx glandular fever?
The monospot test
What are the GI complications of glandular fever?
1) hepatitis; 2) splenomegaly; 3) spleen rupture
What are the CNS complications of glandular fever?
1) aseptic meningitis; 2) encephalitis; 3) GBS
What are the other complications of glandular fever?
POST-VIRAL TENDERNESS; lymphoma; orchitis; myocarditis; pneumonia
What is the causative organism in croup?
Parainfluenza viruses
How is croup managed?
Admit (for moderate/severe) + single dose oral dexamethasone
How is croup managed as an emergency?
High flow oxygen + nebulised adrenaline
What is the HxPC of croup?
- Stridor (laryngeal oedema + secretions)
- Barking cough, worse at night
- Pyrexia
- Coryzal Sx
What type of cough is seen in croup?
Barking cough, worse at night
What is the dose of oral dexamethasone in croup?
0.15mg/kg
What are the causes of stridor in children?
- Croup
- Laryngomalacia
- Epiglossitis
- Foreign body upper airway obstruction
- Anaphylaxis
- Measles
- Diptheria
- Severe LN swelling (as in mono)
- Hypocalcaemia from decreased vit D
- Retropharyngeal abscess
What is the causative organism in whooping cough?
Bordetella pertussis
How long might Sx last in whooping cough?
10-14 WEEKS
What are the 3 phases of whooping cough?
- CATARRHAL PHASE
- PAROXYSMAL PHASE
- CONVALESCENT PHASE
What are the features of the catarrhal phase of whooping cough?
1 week of coryzal Sx
What are the features of the paroxysmal phase of whooping cough?
Paroxysmal/spasmodic cough, followed by an inspiratory ‘whoop’
Lasts 3-6 weeks
How is whooping cough Dx?
Blood film - marked lymphocytosis (>15x10^9)
Nasal swab, culture or PCR (PCR more sensitive)
CXR = patchy atelectasis (as with bronchiolitis)
What are the complications of whooping cough?
- Subconjunctival haemorrhage (from coughing)
- Seizures (from anoxia from coughing)
- Pneumonia
- Bronchiectasis
How is whooping cough managed?
Oral macrolide, e.g. erythromycin, but only decreases Sx if started in the catarrhal phase
Close contacts should receive erythromycin prophylaxis + unvaccinated children should be vaccinated
How long should children stay off school with whooping cough?
May return to school 5 days after commencing antibiotics
What are the causative organisms of bronchiolitis?
- RSV
- Mycoplasma
- Adenovirus
- May be secondary to bacterial infection
What is the organism that most commonly causes bronchiolitis?
RSV - in 75-80%
Who are at increased risk of developing bronchiolitis?
- Premature infants
- Infants with heart/lung abnormalities
- Immunocompromised
What may be given when a child is at increased risk of severe disease to prevent them getting bronchiolitis?
Palvizumab - a monoclonal Ab
What are the CXR findings in bronchiolitis?
Hyperinflation + ‘patchy’ atelectasis + gas trapping
How should bronchiolitis be investigated?
Temperature O2 sats RR HR Cap refill/hydration status Bloods (CXR)
How should bronchiolitis be managed?
Humidified O2 if sats <92%
Supported feeding/NG feeding necessary
Suction for upper airway secretions
What are the causative organisms of pneumonia in newborns?
- Group B strep
2. Gram -ve enterococci
What are the causative organisms of pneumonia in children <5y/o?
1. Viruses most common in <5y/o, usually, RSV Other causes = 2. Strep pneumoniae 3. H. influenzae 4. Bordetella pertussis 5. Chlamydia trachomatis 6. S. aureus
What are the causative organisms of pneumonia in children >5y/o?
Bacterial most common:
- Mycoplasma pneumoniae
- Strep pneumoniae
- Chlamydia pneumoniae
What is the cause of epiglottitis?
Hib
What features should lead you to suspect epiglottis?
- Pyrexia, toxic-looking child
- Child is drooling (because it is painful for them to swallow)
- Inspiratory stridor
- Tripod position (to optimise the airway)