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Substances

Sustancias

Organisms

Organismos

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Infectious Diseases

Enfermedades infecciosas

Microorganisms, viruses and parasites that can cause disease.

Pathogens

Patógenos 

Toxic substance of fungal origin, e.g. aflatoxin. [AGROVOC]

Mycotoxins

Invertebrate organisms that live on or in another organism (the host), and benefit at the expense of the other. Traditionally excluded from definition of parasites are pathogenic bacteria; fungi; viruses; and plants; though they may live parasitically. [NALT]
An organism that lives at the expense of another (host) during some portion of its life cycle. Usually a parasite does not kill its host. [AGROVOC]

Parasites

Parásitos 

Pythium spp.

Microscopic infectious agent that can multiply only in living cells of animals, plants, or bacteria, consisting of genetic material, either DNA or RNA, housed inside a capsid.

Pathogens

Narrower Topics

Bacteria

Mycotoxins

Parasites

Phytophthora

Pythium spp.

Viruses

Pathogens

Narrower Topics

Bacteria

Mycotoxins

Parasites

Phytophthora

Pythium spp.

Viruses

Waterborne Pathogens