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herpesvirus 6; a maculopapular rash appears after the initial high fever with lymphadenopathy.
Strep pyogenes causes tonsilitis and pharyngitis
Haemophilus influenzae type B infection. It is characterised by sudden onset, high fever, continuous stridor and drooling of secretions. Intravenous antibiotics, anaesthetic support are usually indicated.
Caused by Bordetella pertussis infection. Bouts of coughing ending in vomiting, especially at night and after feeding suggest the diagnosis. The characteristic whoop, forced inspiration through a closed glottis may or may not be present. Absolute lymphocytosis is common. Complications include CNS haemorrhages, rectal prolapse and bronchiectasis.
Croup usually occurs in epidemics in autumn or spring. Causative viruses are parainfluenza (types 1,2,or 3), respiratory syncytial viruses and measles virus. Onset is over a few days, stridor is harsh and occurs only when the child is upset. A barking cough, harsh voice and inability to swallow secretions are typical.
Maculopapular rash, jaundice(rarely), hepatosplenomegaly, tonsils, pharyngitis, atypical lymphocytes, mild thrombocytopenia
- Chicken pox 7-21 days
- Whooping cough average 10-14 days (range 6-20)
- Hand, foot and mouth disease 2-3 days
- German measles 14-21 days
- Mumps 12-28 days.