Streptomycin, a type of antibiotic, is now less effective in treating TB worldwide.
Which of the following could be a reason for this?
There is an increase in the number of people infected with drug-resistant strains.
The incidence of HIV infection is increasing, activating previously inactive Mycobacterium infections.
Fewer people are living in isolated rural areas and overcrowding occurs in inner cities.
Antibiotics such as streptomycin are not effective as antiviral drugs.
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