Which of the following are the reasons for the occurrence of multi-drug resistance in microbial pathogens in India?

1. Genetic predisposition of some people
2. Taking incorrect doses of antibiotics to cure diseases
3. Using antibiotics in livestock farming
4. Multiple chronic diseases in some people

Select the correct answer using the code given below.

The correct option is 2 and 3 only.

Multi-drug resistance (MDR) occurs when microorganisms (such as bacteria, viruses, fungi, and parasites) acquire resistance to antimicrobial medications that were previously effective in treating infections. Let us analyze each of the given statements to understand the underlying causes in India:

1. Genetic predisposition of some people:
This statement is incorrect. Multi-drug resistance is a property acquired or developed by the microbial pathogens themselves, not by human genetics. Human genetic predisposition affects individual susceptibility to certain host diseases or immunity responses, but it does not drive the mutation or spread of drug resistance in microbes.

2. Taking incorrect doses of antibiotics to cure diseases:
This statement is correct. Misuse, self-medication, incomplete courses, and taking inappropriate doses of antibiotics create selective pressure on bacterial populations. Microbes with partial resistance survive low or incorrect doses, multiply, and transfer resistant genes to other microbes, leading to multi-drug resistance.

3. Using antibiotics in livestock farming:
This statement is correct. In agriculture and livestock farming, antibiotics are frequently used as growth promoters and preventive treatments. Resistant bacteria developed in animals can be transmitted to humans through the food chain, direct animal contact, or environmental contamination (soil and water runoff).

4. Multiple chronic diseases in some people:
This statement is incorrect. While having multiple chronic diseases (comorbidities) makes patients more vulnerable to severe infections, the presence of chronic illness itself is not a direct biological mechanism or reason for the emergence of multi-drug resistance in pathogens.

Therefore, statements 2 and 3 accurately represent the causes for the occurrence of multi-drug resistance in microbial pathogens.