The first antibiotic to be utilized was **penicillin**. Discovered by Alexander Fleming in 1928, penicillin marked a significant advancement in medicine as it was the first true antibiotic that could effectively treat bacterial infections. Its widespread use began during World War II, saving countless lives by treating infections that were previously often fatal.

Other options listed, such as sulfonamides and salvarsan, refer to early antimicrobial agents but they are not antibiotics in the strictest sense. Sulfonamides, discovered in the 1930s, were the first synthetic antimicrobial drugs, while salvarsan was developed in 1910 as a treatment for syphilis but is considered an arsenic compound rather than a true antibiotic. Quinine and vancomycin are also important, but they were not the first antibiotics utilized. Therefore, penicillin holds the title for being the first widely used antibiotic in medical history.

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The first antibiotic to be utilized was **penicillin**. Discovered by Alexander Fleming in 1928, penicillin marked a significant advancement in medicine as it was the first true antibiotic that could effectively treat bacterial infections. Its widespread use began during World War II, saving countless lives by treating infections that were previously often fatal.

Other options listed, such as sulfonamides and salvarsan, refer to early antimicrobial agents but they are not antibiotics in the strictest sense. Sulfonamides, discovered in the 1930s, were the first synthetic antimicrobial drugs, while salvarsan was developed in 1910 as a treatment for syphilis but is considered an arsenic compound rather than a true antibiotic. Quinine and vancomycin are also important, but they were not the first antibiotics utilized. Therefore, penicillin holds the title for being the first widely used antibiotic in medical history.

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The first antibiotic to be utilized was **penicillin**. Discovered by Alexander Fleming in 1928, penicillin marked a significant advancement in medicine as it was the first true antibiotic that could effectively treat bacterial infections. Its widespread use began during World War II, saving countless lives by treating infections that were previously often fatal.

Other options listed, such as sulfonamides and salvarsan, refer to early antimicrobial agents but they are not antibiotics in the strictest sense. Sulfonamides, discovered in the 1930s, were the first synthetic antimicrobial drugs, while salvarsan was developed in 1910 as a treatment for syphilis but is considered an arsenic compound rather than a true antibiotic. Quinine and vancomycin are also important, but they were not the first antibiotics utilized. Therefore, penicillin holds the title for being the first widely used antibiotic in medical history.

The first antibiotic to be utilized wasGroup of answer choicessulfonamides.quinine.vancomycin.penicillin.salvarsan.

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The first antibiotic to be utilized was

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