Chlamydia trachomatis is the infectious agent in all the following conditions in humans except:

 A microbiologist is reading an anaerobic culture and observes a double zone of hemolysis on an anaerobically incubated sheep blood agar plate. The Gram stain of that organism was a spore-forming, gram-positive bacillus. What organism is this?

Identify the structure A.

Identify the histology shown in the image.

Name the blood cell shown in the image.

What type of blood is shown in the image?

Name the tissue shown in the image.

Identify the structure histology shown in the image.

Enriched media:

When using the isolation streaking technique, the greatest concentration of organisms (if present) will be in which quadrant?