Lecture 3 - Fever and Cough: Upper Respiratory Tract Infection

Question 1

Streptococcus bacteria?

Answer 1

pyogenus (pharyngitis only, rheumatic fever risk) and pneumoniae (otitis media, pneumonia, sinusitis)

Question 2

Viruses of upper respiratory tract?

Answer 2

rhinoviruses, coronaviruses, respiratory syncytial viruses, influenza - widespread anatomically than bacteria

Question 3

S. Pyogenes pharyngitis signs?

Answer 3

high fever, pain, dysphagia, adenopathy, redness

Question 4

Identifying s. pyogenus?

Answer 4

clear beta haemolysis on petri dish (Group A)

Question 5

Typical course of viral URI?

Answer 5

fever for 2-3 days of onset, cough for 7-10 days, rhinorrhoea that progresses from clear to purulent to clear over 1-2 weeks

Question 6

Viral pharyngitis signs?

Answer 6

diffuse illness: rhinorrhea, hoarse voice, cough, conjunctival signs

Question 7

Haemolysis of blood agar?

Answer 7

partial, green alpha haemolysis = s. pneumoniae, complete clear beta haemolysis = s. pyogenes, no haemolysis = enterococcus faecalis