Possible parasites include parasitic nematodes, copepods, protozoa and helminths.

Examples include bacteria, amoeba and protozoa such as the paramecium.

Pathogens include bacteria, viruses, fungi, and protozoa.

The fermenting organisms include bacteria, fungi, and protozoa.

Human parasites include various protozoa and worms which may infect humans, causing parasitic diseases.

These organisms include earthworms, nematodes, protozoa, fungi, bacteria and different arthropods.

Microbes in the reticulorumen include bacteria, protozoa, fungi, archaea, and viruses.

The air remains and may support an ice ecosystem which includes viruses, bacteria, protozoa, algae and fungi.

Such pathogens include bacteria, viruses, or protozoa and many multicellular parasites.

These atypical organisms include special bacteria, viruses, fungi, and protozoa.