Appendix+N+Case+History+%233

Appendix N: Case History # 3 Answers Directions : Read the following history and answer the questions, using your text and any available reference books. After you have recorded your answers, discuss the questions with your lab partners or as a lab. A sixyearold patient with streptococcal sore throat takes penicillin for 2 days of a prescribed 10day regimen. Since she begins to feel well, she is allowed to stop taking the penicillin. Three weeks later she awakens with pain and swelling in the right ankle and fever. Upon evaluation by her physician, she is noted to have a heart murmur. She is admitted to the hospital with a presumptive diagnosis of rheumatic fever. 1. The patient had a sore throat that preceded her acute rheumatic fever. What pathogen would probably have been isolated from a throat culture before she was given penicillin? How can an "A" disc help in the identification of this organism? What is contained in the "A" disc? 2. Which type of hemolysis is seen when this organism is streaked on sheep blood agar? 3. How is pharyngitis with this bacterium related to the subsequent development of rheumatic fever? 4. What are some other types of disease caused by this organism? streptococcus pyogenes would have been isolated from a throat culture before she was given penicillin . DISK A contains pacific In. group A beta nemolytic streptococci are sensitive To It Beta nemolysis is seen when this organism is streaked on sheep blood agar . It is caused by erythrogenic toxin , untreated pharyngitis can lead to Rheumatic fever . some other types of diseases are pharyngitis and glomerulonepritys .