Question

Among the following, the narrow-spectrum antibiotic is:
(A)- Penicillin G
(B)- Ampicillin
(C)- Amoxycillin
(D)- Chloramphenicol

Answer 1

Hint: There are two types of spectrum for antibiotics i.e., broad-spectrum and narrow spectrum. Narrow spectrum antibiotics are those antibiotics that have an effect against only a few pathogens or bacteria.

Complete step by step solution:
All the members like Penicillin G, Penicillin V, etc, have a narrow spectrum and are effective only against diseases caused by various cocci and some gram-positive bacteria. However, some people have an allergy to penicillin. Hence, it is essential to test the sensitivity of the patient by giving a test dose before giving the full dose.
The first antibiotic penicillin was obtained from the mold of Penicillium notatum. It was discovered by Alexander Fleming in 1929. Penicillium notatum is an antibacterial fungus. The microbial strain is extracted from the fungus.
Ampicillin and amoxicillin are very common and these are semi-synthetic modifications of penicillin. Since they are synthetic modification they can be used for a variety of pathogens.
Penicillin has a bacteriostatic effect called Erythromycin. Bacterial infections are treated with erythromycin because it has an effect against bacteria. Penicillin can be used to treat many diseases and is a very effective drug for pneumonia, bronchitis, sore throat, abscesses, and other infectious diseases.
Antibiotics which are broad-spectrum antibiotics, penicillin is a type of antibiotic and it comes under narrow-spectrum antibiotics

Therefore, the correct answer is option (A)- Penicillin G.

Note: Chloramphenicol is an antibiotic that was isolated in 1947, and it is a broad-spectrum antibiotic. Penicillin comes under the group of the bactericidal group in antibiotics.