IMMUNOLOGY

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: -Most pathogens are able to avoid the immune responses of the host, triggering associated illnesses. The pathogen then utilizes the host body’s resources to replicate before exiting and spreading to a new host (like a virus).

Detailed explanation-3: -The agents that cause disease fall into five groups: viruses, bacteria, fungi, protozoa, and helminths (worms). Protozoa and worms are usually grouped together as parasites, and are the subject of the discipline of parasitology, whereas viruses, bacteria, and fungi are the subject of microbiology.

Detailed explanation-4: -The different types of agents, such as bacteria, fungi, algae, viruses, etc. which cause diseases in animals and plants, are known as pathogens. They may cause physiological malfunctioning. Pathogens spread disease by air, water, and through potential vectors, also spread through contact.

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).

Detailed explanation-6: -common cold. flu. meningitis. warts, including genital warts. oral and genital herpes. chickenpox/shingles. measles. viral gastroenteritis, including norovirus and rotavirus. More items •03-Apr-2019