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Module 1: Transmisión de patógenos y parásitos de animales y plantas

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Transmisión de patógenos y parásitos de animales y plantas

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XSIQ
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Biology - Transmission of Pathogens and Parasites in Animals and Plants


Transmission of Pathogens and Parasites in Animals and Plants

This unit of work covers the transmission of pathogens and parasites in
animals and plants and explores: the factors that affect infections,
defence mechanisms of plants and animals, inflammation, fever, the human
lymphatic system, antibodies, allergic reactions and acquired immunity.
Let's begin with the transmission of pathogens and parasites.

* contact - direct and indirect

* droplet infection - pathogens are carried on droplets of mucus

* agents - food, water, air

* animal vectors; for example, mosquitoes, fleas, ticks, lice

* saliva of plant-eating insects; for example, aphids carry microscopic
pathogenic organisms from one plant to another

* insects which drill holes in plants through which to lay their eggs;
for example, some parasitic wasps drill holes which also provide access to
other pathogenic organisms such as fungal spores

* natural openings, e.g. stomata

* pathogens that secrete enzymes, making a hole in the cuticle and
thereby gaining access

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