MEDICAL PHYSIOLOGY

Detailed explanation-1: -What is a pathogen? A pathogen is defined as an organism causing disease to its host, with the severity of the disease symptoms referred to as virulence. Pathogens are taxonomically widely diverse and comprise viruses and bacteria as well as unicellular and multicellular eukaryotes.

Detailed explanation-2: -What are pathogens? Pathogens include viruses, bacteria, fungi, and parasites that invade the body and can cause health issues. Anthrax, HIV, Epstein-Barr virus, and the Zika virus, among many others are examples of pathogens that cause serious diseases.

Detailed explanation-3: -Infectious diseases are caused by pathogens, which include bacteria, fungi, protozoa, worms, viruses, and even infectious proteins called prions. Pathogens of all classes must have mechanisms for entering their host and for evading immediate destruction by the host immune system.

Detailed explanation-4: -Examples of common human diseases caused by viruses include the common cold, influenza, chickenpox, and cold sores. Many serious diseases, such as rabies, Ebola virus disease, AIDS (HIV), avian influenza, and SARS, are caused by viruses, and the current global COVID-19 pandemic has been caused by SARS-CoV-2.

Detailed explanation-5: -Pathogenic organisms. Similar term(s): pathogen. Definition: Organisms, including bacteria, viruses or cysts, capable of causing diseases (typhoid, cholera, dysentery) in a host (such as a person).