NEET PG DENTAL EXAM

Detailed explanation-1: -A disease is a particular abnormal condition that negatively affects the structure or function of all or part of an organism, and that is not immediately due to any external injury. Diseases are often known to be medical conditions that are associated with specific signs and symptoms.

Detailed explanation-2: -In simple terms a disease can be defined as a disorder of structure or function of an organism that is not a direct result of physical injury. The manifestation of disease is a direct consequence of a disruption of function of a biological system at a molecular and cellular level.

Detailed explanation-3: -A pathogen is a microorganism that causes disease or ilness in multicelluar organisms like plants and animals.

Detailed explanation-4: -While there are many different types of diseases, these four categories encompass the vast majority of known illnesses: infectious, genetic, metabolic, and external.