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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Drug which can used in management of streptococcal endocarditis susceptible to penicillin, but patient developing immediate allergy following penicillin administration
assistant
The correct answer is  Ans. is 'b' i.e., Vancomycin * Following table depicts the medical treatment of choice in patients with streptococcal endocarditis:Antibiotic Treatment for infective Endocarditis Caused by Common Organisms"OrganismDrug (Dose, Duration)CommentsStreptococciPe nicill i n - susceptible streptococci, S. gallolyticus* Penicillin G (2-3 mU IV q4h for 4 weeks)--* Ceftriaxone (2 g/d IV as a single dose for 4 weeks)* Vancomycin (15 mg/kg IV q I2h for 4 weeks)* Penicillin G (2-3 mU IV q4h) or ceftriaxone (2 g IV qd) for 2 weeks plus Gentamicin or divided into equal doses q8h for 2 weeks)Can use ceftriaxone in patients with nonimmediate penicillin allergy Use vancomvcin in patients with severe or immediate b-lactam allergyAvoid 2-weeks regimen when risk of aminoglycoside toxicity is increased and in prosthetic valve or complicated endocarditisRelatively penicillin - resistant streptococci* Penicillin G (4 mU IV q4h) or ceftriaxone (2 g IV qd) for 4 weeks plus Gentamicindd ( 3mg/kg qd IV or IM, as a single dosee or divided into equal doses q8h for 2 weeks)* Vancomycin0 as noted above for 4 weeksPenicillin alone at this dose for 6 weeks or with gentamicin during initial 2 weeks preferred for prosthetic valve endocarditis caused by streptococci with penicillin MICs of < 0.1 mg/ mLModerately penicillin -resistant streptococci, nutritionally variant organisms, or Gemella morbillorum* Penicillin G (4-5 mU IV q4h) or ceftriaxone (2g IV qd) for 6 weeks plus Gentamicin (3 mg/kg qd IV or IM as a single dosee or divided into equal doses q8h for 6 weeks)Preferred for prosthetic valve endocarditis caused by streptococci with penicillin MICs fo >0.1 mg/mL * Vancomycinc as noted above for 4 weeks--