Infectious Agents Flashcards

1
Q

What are the 5 main types of infectious agents?

A
Viruses
Bacteria
Fungi
Protozoa
Helminthes
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2
Q

Example of a pathogenic virus and the disease it causes

A

Influenza virus, causes the flu

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3
Q

Example of a pathogenic bacterium and the disease it causes

A

Mycobacterium tuberculosis, causes tuberculosis

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4
Q

Example of a pathogenic fungus and the disease it causes

A

Aspergillus fumigatus, causes aspergillosis

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5
Q

Example of a pathogenic protozoa and the disease it causes

A

Leishmania spp (parasite), causes leishmaniasis (sand fly vector)

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6
Q

Example of a pathogenic Helminth and the disease it causes

A

Schistosoma spp (parasites), causes schistosomiasis

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7
Q

Main distinguishing features and replication method of viruses

A

Obligate parasites, take over host nuclear synthetic machinery, divide by budding out of cell. Can congregate in liver then spontaneously release causing fever spike.

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8
Q

Main distinguishing features and replication method of bacteria

A

Prokaryotes, replicate by binary fission. 3 types: Bacillus (rod) Coccus (round) Spirillus (spiral).

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9
Q

Main distinguishing features and replication method of fungi

A

Single-celled eukaryotes. Spores spread and grow. Systemic infection affects immunocompromised people.

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10
Q

Main distinguishing features and replication method of protozoa

A

Singled celled eukaryotes. May have complex life cycles and multiple hosts, eg malaria with humans and mosquitoes

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11
Q

Main distinguishing features and replication method of Helminthes

A

Multicelled organisms, flatworms, roundworms, and tapeworms. Life cycles outside of host and transmitted by vectors.

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