Respiratory Tract Infection Flashcards
What conditions affect the upper respiratory tract?
* Common cold – coryza * Sore throat – Pharyngitis * Sinusitis * Epiglottitis
What is the upper RT?
Above the vocal cords
What conditions affect the lower respiratory tract?
* Acute bronchitis * Acute exacerbation of chronic bronchitis * Pneumonia * Influenza
What is coryza?
Common cold - acute viral infection of the nasal passages
What are symptoms of coryza?
* Sore throat * Sometimes a mild fever
How is coryza spread?
Spread by droplets and fomites
What are complications of coryza?
* Sinusitis * Acute bronchitis
How can you avoid over-treating a patient for common cold (mistaking for influenza A, B etc), etc?
Identifying pathogens via viral throat swab (red-topped tube), followed by PCR
What is a red-topped tube used for?
Contains viral material
What are the symptoms/signs of strep throat?
* Exudate * Pus * Sore throat * Dysphagia * Dysphonia
What are symptoms of tonsillitis?
* Swollen tonsils * Erythematous * Dysphagia * Dysphonia
Do you only suffer from tonsillitis once?
No, reccurent
What is a possible treatment for tonsillitis?
Tonsilectomy
What is Quinsy?
A complication of tonsillitis - tonsilar abscess
What is the treatment for Quinsy?
Can be drained (risk of cutting internal carotid artery)
Is tonsillitis as dangerous as Quinsy?
No, Quinsy much more dangerous
What is epiglottitis?
Swelling of epiglottis - can block airway
What is the treatment for epiglottitis?
* Intubation by anaesthetist * Antibiotics
What viruses are responsible for coryza?
* Adenovirus * Rhinovirus * Respiratory Syncytial Virus (RSV)
Is there treatment for coryza (common cold)?
No, self-limiting
What causes acute sinusitis?
Preceded by a common cold
What are symptoms of sinusitis?
* Frontal headache * Retro-oribital pain * Maxilliary sinus pain * Tooth ache * Nasal discharge
What is the treatment for sinusitis?
* Usually self limited * Resolves in 10 days * Some need antibiotics
Why can sinusitis be dangerous?
Lymphatic drainage of face goes to brain, can spread to brain
What is diphtheria?
Life threatening condition due to toxin production
Why is diphtheria not common today?
Eradicated by vaccination
What are characteristics that make diphtheria so dangerous?
* Toxin production * Pseudo membrane can block airways
What causes acute bronchitis?
Preceded by common cold
What are clinical features of acute bronchitis?
* Productive cough * Fever – minority of cases * Normal chest examination * Normal chest X-ray * May have a transient wheeze
What is the treatment for acute bronchitis?
* Usually self limiting in normal people * Antibiotics are NOT indicated for normal people * Can lead to significant morbidity in patients with chronic lung disease