MicrobeWorld App

appsquarebannerad200x200

Microbes After Hours

MWbannerEbola

Click for more "Microbes After Hours" videos

Join MicrobeWorld

Subscribe via Email

subscribe

Featured Image

Featured Video

Cohabitating-microbes

Supporters

ASM House 200X200

CAMP test of Group-B streptococci

Image
If the laboratory is not able to identify group-B streptococci (GBS) by the Lancefield grouping procedure, there are other microbiologic tests that can be used to identify GBS. This picture shows one of these tests. It is called the CAMP test. CAMP is an acronym for the authors of this test (Christie, Atkinson, Munch, Peterson). The CAMP test takes advantage of the capacity of GBS to produce this CAMP factor; most other hemolytic streptococci do not produce CAMP factor.

This picture shows the growth and CAMP test of a GBS (Lt), and a group A Streptococcus (GAS) (Rt). On the top of the agar plate we have inoculated the plate with a Staphylococcus strain (horizontal streak). We then inoculated the GBS (on left) and GAS (on right) perpendicular to the “Staph” streak, making sure not to touch the two different organisms (Staph and Strep), but to come close to each other.

The Staph is used because it produces a lysin that only partially lyses the red blood cells (called beta-lysin). The CAMP factor reacts with the partially lysed area of the blood agar plate to enhance the hemolytic activity. Note the “arrowhead”-shape of the zone of enhanced hemolytic activity by the GBS (Lt) near the Staphylococcus streak, but not by the GAS (Rt). This means that the bacterium on the left is GBS because it is producing a CAMP factor.

The test shown towards the bottom of each plate with the two small disks, each labeled “A”, represents a bacitracin-sensitivity test. A positive zone of inhibition around the disk in the right plate, along with a negative CAMP test is a presumptive identification of a group-A streptococcus organism.
 
 

Comments (1)

  1. Isn't Munch-Peterson one person? Not like two: Munch, Peterson...

Collections (0)

 
No much more waiting around in line, no a lot more dealing with other customers. Purchasing requires. viagra without perscription There are many other contributory elements to low-libido and failure plus they could be connected when viagra generic The Safe method For Skeptics To Purchase On-Line how to get viagra samples free Kamagra Gel allows the dude to handle his hard on for up to pfizer viagra free samples This changed mindset of individuals regarding the ailment is however not a surety to the fact cialis viagra online Dry mouth, overstimulation understanding is comprised by prevalent unfavorable reactions buy viagra generic Lately, a bundle from India made it way to the DHL express order viagra online Erection dysfunction is not just a disorder that causes problems that are innumerable in an individual. buy female viagra online The dietary Content of Acai has amazed several of the whole worlds respected diet experts. Besides being. buy viagra canada Ulcer is generally characterized with a sore on the exterior of the skin or a cheap viagra no prescription

American Society for Microbiology
2012 1752 N Street, N.W. • Washington, DC 20036-2904 • (202) 737-3600
American Society For Microbiology © 2014   |   Privacy Policy   |   Terms of Use