Infectious and parasitic diseases are caused by pathogenic microorganisms such as bacteria, viruses, fungi, and parasites that invade the human body and disrupt normal physiological functions. These diseases can spread through contaminated food, water, air, vectors like mosquitoes, or direct human contact, leading to a wide range of clinical manifestations. Effective identification through diagnostic techniques and timely treatment is crucial to control their transmission and reduce associated morbidity and mortality.