MCQ IN MEDICINE

Detailed explanation-1: -The human body contains billions of bacteria which can be both beneficial and harmful. Some of the harmful bacteria, known as pathogens, are germs that can cause damage and disease via interaction with a host.

Detailed explanation-2: -Obligate pathogens are found among bacteria, including the agents of tuberculosis and syphilis, as well as protozoans (such as those causing malaria) and macroparasites. Some obligate pathogens require multiple different hosts to fulfil their life cycle.

Detailed explanation-3: -A pathogen brings disease to its host. Another name for a pathogen is an infectious agent, as they cause infections. As with any organism, pathogens prioritize survival and reproduction. The human body’s immune system acts as a defense against pathogens.

Detailed explanation-4: -A pathogen is an organism that causes disease. Your body is naturally full of microbes. However, these microbes only cause a problem if your immune system is weakened or if they manage to enter a normally sterile part of your body. Pathogens are different and can cause disease upon entering the body.