Infections of the Pharynx

Question 1

Mostly viral or bacterial?

Answer 1

viral

Question 2

example of a viral infection?

Answer 2

COMMON COLD (RHINOVIRUSES)

Question 3

Most common bacterial causes of infection?

Answer 3

STREPTOCOCCUS PYOGENES,
LANCEFIELD GROUP C AND G STREPTOCOCCI

Question 4

What are the associated complications with corynebacterium diphtheriae infections

Answer 4

respiratory and heart failure

Question 5

How is a bacterial pharyngeal infection diagnosis?

Answer 5

Take a throat swap, direct microscopy not done so cultured!

Question 6

What are the mediums used in the culture?

Answer 6

BLOOD AGAR IN 5% CO2
HOYLES MEDIUM IN 5% CO2

Question 7

What is the gram status and shape of streptococcus pyogenes?

Answer 7

GRAM POSITIVE COCCUS

Question 8

Catalase negative or positive?

Answer 8

CATALASE NEGATIVE

Question 9

Alpha, beta or gamma haemolytic?

Answer 9

BETA HAEMOLYTIC

Question 10

What agglutination can be seen?

Answer 10

AGGLUTINATION WITH ANTIBODIES DIRECTED AGAINST LANCEFIELD GROUP A

Question 11

How is corynebacterium diphtheriae identified?

Answer 11

HOYLES MEDIUM: TELLURITE
INHIBITORY TO MOST RESPIRATORY TRACT FLORA
ORGANISMS METABOLISING TELLURITE PRODUCE BLACK COLONIES

Question 12

In what circumstances can a presumptive positive report be assumed?

Answer 12

CLINICAL SUSPICION OF DIPHTHERIA + BLACK COLONIES ON HOYLES YIELDING GRAM POSITVE RODS