Select ALL of the following which are true. Haemolysis: can be classified as eit
ID: 87836 • Letter: S
Question
Select ALL of the following which are true.
Haemolysis:
can be classified as either alpha, beta, or gamma.
can be seen when Haemophilus influenzae is grown on a blood agar plate (BAP).
can occur when enteroviruses are grown on enriched and differential media.
can appear as a greenish zone around bacterial colonies grown on a chocolate agar plate (CAP).
is a virulence factor possessed by Gram-negative bacteria.
can be caused by bacteria growing on simple nutrient media.
can appear as a clear zone around bacterial colonies grown on a blood agar plate (BAP).
can be defined as lysis of red blood cells.
is caused by bacteria that produce a polysaccharide capsule.
can be classified as either alpha, beta, or gamma.
can be seen when Haemophilus influenzae is grown on a blood agar plate (BAP).
can occur when enteroviruses are grown on enriched and differential media.
can appear as a greenish zone around bacterial colonies grown on a chocolate agar plate (CAP).
is a virulence factor possessed by Gram-negative bacteria.
can be caused by bacteria growing on simple nutrient media.
can appear as a clear zone around bacterial colonies grown on a blood agar plate (BAP).
can be defined as lysis of red blood cells.
is caused by bacteria that produce a polysaccharide capsule.
Explanation / Answer
Haemolysis:
A)can be classified as either alpha, beta, or gamma.
B)can be seen when Haemophilus influenzae is grown on a blood agar plate (BAP).
C)can occur when enteroviruses are grown on enriched and differential media.
D)can appear as a greenish zone around bacterial colonies grown on a chocolate agar plate (CAP).
E)is a virulence factor possessed by Gram-negative bacteria.
F)can be caused by bacteria growing on simple nutrient media.
G)can appear as a clear zone around bacterial colonies grown on a blood agar plate (BAP).
H)can be defined as lysis of red blood cells.
I)is caused by bacteria that produce a polysaccharide capsule.
Answer is A C D E G H I
A) There are 3 types of hemolysis called as alpha, beta and gamma.
B) H. haemolyticus is differentiated from H. influenzae when to use of blood agar. H. haemolyticus can cause haemolysis. Haemophilus influenzae need factors X and V and it grows on chocolate agar and not on blood agar
C) Blood agar is a common differential culture medium which is used to identify bacteria that causes haemolysis in blood.
D) When grown on chocolate agar it produce a greenish zone of hemolysis around a chocolate agar.
E) Gram-negative bacteria secrete a variety of virulence factors. The toxin possesses hemolytic activity.
G) Blood agar is shows clear zone around bacterial growth which are RBC hemolyzed completely
H) haemolysis is Lydia of RBS
I) Streptococcus pneumoniae are a hemolytic
. They show beta/complete hemolysis