Explain why methicillin resistant staphlococcus aureus (mrsa) is more prevalent now than it was only 30 years ago. a. antibiotics cause mutations in staphlococcus aureus that lead to an increase in the number of methicillin-resistant strains. b. methicillin resistance causes an infection to spread more rapidly. c. frequent and inappropriate use of methicillin-type antibiotics has provided selective pressure that has resulted in an increase in the proportion of methicillin-resistant strains of staphlococcus aureus. d. diseases like aids have made people more vulnerable to infections from staphlococcus aureus.

The correct answer is option C which is frequent and inappropriate use of methicillin-type antibiotics has provided selective pressure that has resulted in an increase in the proportion of methicillin-resistant strains of Staphylococcus aureus.

In today's world,the major issue related to the antibiotic resistance.

Antibiotic resistance is the inability of an antibiotic to kill the targeted organisms.

The continues and non prescribed use of antibiotics leads to antibiotics resistance.

As the population of bacteria nonresistance to antibiotics would be killed by continues use. The resistant strain will rapidly replicate to acquire the habitat.

Hence the correct statement about antibiotic resistance is C.

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