A 34-year-old woman comes to the clinic because of left ...

Serological Groups A, B, C, and D. These are antigens A, B, C and D. Group A : Strep pyogenes –which is responsible for 25% of upper respiratory infections. Group B: Strep agalactiae –frequently found in milk (mastitis in cows) & 3rd trimester women vaginal cultures. Group C: we don’t need to know any specific examples ................
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