Question

model 2 – six modes of disease transmission

1. model 2 illustrates several methods by which diseases may be transmitted.

a. list the six modes of disease transmission shown in model 2.
b. which of these modes of transmission require a bodily opening, either natural or artificial?

1. an organism that is used by a pathogen to move from one person to another is called a vector.

a. what vector is shown in model 2?
b. with your group, brainstorm a list of other organisms besides the one shown in the diagram that could be vectors for transmitting pathogens.

Explanation:

The problem is about disease transmission modes and vectors, which falls under the subfield of Medicine and Health (Natural Science). For question 8a, we identify the labels in the diagram: Airborne, Foodborne or waterborne, Vector, Contact, Sexual, Bloodborne. For 8b, modes needing bodily openings: Bloodborne (enters via wounds), Sexual (natural openings), Contact (if through openings), Foodborne/waterborne (mouth), Airborne (nose/mouth). For 9a, the vector shown is an insect (like a mosquito or tick, from the arm illustration). For 9b, other vectors: fleas, lice, rodents, etc.

Answer:

8a

• Airborne
• Foodborne or waterborne
• Vector
• Contact
• Sexual
• Bloodborne

8b

Bloodborne, Sexual, Foodborne or waterborne, Airborne (enters through natural openings like mouth/nose), Contact (if through openings like cuts or mucous membranes)

9a

An insect (e.g., mosquito, tick - as shown on the arm)

9b

Fleas, lice, rodents, bats, flies (e.g., tsetse fly), etc.