Quick Answer: Does Streptococcus Grow On Chocolate Agar?

What Agar does Streptococcus grow on?

The streptococci are usually isolated on Blood agar.

Blood agar is one of the most commonly used media in a clinical lab.

It consists of an enriched agar base (Tryptic Soy agar) to which 5% sheep red blood cells have been added..

What bacteria can grow on chocolate agar?

It is a variant of the blood agar plate, containing red blood cells that have been lysed by slowly heating to 80°C. Chocolate agar is used for growing fastidious respiratory bacteria, such as Haemophilus influenzae and Neisseria meningitidis. In addition, some of these bacteria, most notably H.

Can Streptococcus grow on nutrient agar?

Nutrient agar provides these resources for many types of microbes, from fungi like yeast and mold to common bacteria such as Streptococcus and Staphylococcus. The microbes that can be grown on complex media such as nutrient agar can be described as nonfastidious organisms.

What is the difference between chocolate agar and blood agar?

Chocolate agar is used for the isolation of fastidious organisms, such as Haemophilus influenzae, when incubated at 35-37°C in a 5% CO2 atmosphere. The composition of chocolate agar and the Blood Agar is the same and the only difference is while preparing chocolate agar, the red blood cells are lysed.

What Bacteria grows on MacConkey Agar?

MacConkey agar is selective for Gram-negative organisms and helps to differentiate lactose fermenting gram-negative rods from non-lactose fermenting gram-negative rods. It is primarily used for the detection and isolation of members of family enterobacteriaceae and Pseudomonas spp.

What grows on a MacConkey Agar?

MacConkey Agar (MAC) is a selective and differential medium designed to isolate and differentiate enterics based on their ability to ferment lactose. Bile salts and crystal violet inhibit the growth of Gram positive organisms. … Klebsiella pneumoniae ferments lactose and produces pink colonies on MAC.

Can Streptococcus grow on Macconkey Agar?

Growth of Streptococcus pneumoniae on Macconkey Agar: Possibility of Impossible? Streptococcus pneumoniae (S. … Hence, it does not grow on MacConkey agar (MA) due to the absence of blood as well as due to the presence of high concentration of bile in the medium which is inhibitory to the growth of S.

Does bacteria grow on chocolate?

Moraxella organisms are small, gram-negative bacteria that grow well on blood or chocolate agar.

What bacteria does not grow on blood agar?

Blood agar is an enriched, bacterial growth medium. Fastidious organisms, such as streptococci, do not grow well on ordinary growth media.