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CMMC Case - A Diagnostic Dilemma Slideshow

Cohen, J. F., Bertille, N., Cohen, R., & Chalumeau, M. (2016, July 4). Rapid antigen detection test for group A streptococcus in children with pharyngitis. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6457926/.

Gram Staining. Microscopy. (2016, November 3). https://serc.carleton.edu/microbelife/research_methods/microscopy/gramstain.html.

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The patient's symptoms were completely resolved with this course of treatment.

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The patient’s peritonsillar abscess was drained.

The patient was also treated for 10 days with an antibiotic penicillin.

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The picture on the left is of the bacteria under a light microscope, and the picture on the right is of the bacteria in the blood agar plate.

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The microbiologist observing the throat culture in the plates noted β-hemolytic colonies on the blood agar plates after 24 hours incubation.

The microbiologist used a gram stain to observe the culture under a light microscope which revealed gram-positive cocci-shaped bacteria growing in long chains.

This information from the microbiologist allowed the physician to make the diagnosis of Peritonsillar abscess caused by bacterial Group A Streptococcus.

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Upon his first visit, a rapid antigen detection test (RADT) for Group A Streptococcus was ordered.

In addition, a throat swab was collected for a culture and sent out to the lab for examination.

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The patient initially presented with a sore throat, fever, and swollen tonsils.

A rapid antigen detection test for Group A Streptococcus was performed and was negative.

A throat swab was collected, and the patient was sent home.

The patient returned the next day with a worsening sore throat, difficulty swallowing, pus on the tonsils, and his uvula was deviated toward one side of the throat.