Science & Technology Practice Question›› General Science ››
Microbiology
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Antibiotic Resistance in Bacteria
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Question 1
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Which of the following bacteria are known to exhibit high levels of antibiotic resistance?
1. Escherichia coli (E. coli)
2. Staphylococcus aureus
3. Mycobacterium tuberculosis
4. Bacillus thuringiensis
Select the correct answer using the codes below:
(a) 1 and 2 only
(b) 1, 2, and 3 only
(c) 2, 3, and 4 only
(d) 1, 2, 3, and 4
Explanation Escherichia coli (E. coli): Some strains of E. coli, especially those that cause urinary tract infections (UTIs) and gastrointestinal diseases, have developed resistance to multiple antibiotics, including extended-spectrum beta-lactams (ESBLs) and carbapenems.
Staphylococcus aureus: Staphylococcus aureus, particularly Methicillin-resistant Staphylococcus aureus (MRSA), is a well-known bacterium that exhibits high levels of resistance to many antibiotics, including methicillin, and is a major cause of hospital-associated infections.
Mycobacterium tuberculosis: Mycobacterium tuberculosis, the causative agent of tuberculosis (TB), can develop drug resistance to first-line and second-line antibiotics, leading to multidrug-resistant TB (MDR-TB) and extensively drug-resistant TB (XDR-TB).
Bacillus thuringiensis: Bacillus thuringiensis is a bacterium that is widely used as a biopesticide and is not typically associated with antibiotic resistance. It produces proteins toxic to insects, and its main use is in agriculture, not in human infections.
Since Bacillus thuringiensis is not known for high levels of antibiotic resistance.
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