Question

A) Explore the CDC website regarding modes of transmission of Giardia. Which of the following scenarios could result in transmission of Giardia? Remember that giardiasis is classified as a waterborne disease.

Select all that apply

1) Oral-anal contact during sex

2) Having a housemate that is infected with Giardia

3) An accidental needle stick during a blood draw from an infected person

4) Cleaning your dog’s crate after he has had diarrhea

5) Getting a bit of river water in your mouth while swimming B) Use the CDC website to examine giardiasis surveillance data. Notice the variety of transmission modes that have been identified. The CDC notes several characteristics that make drinking and recreational water and person-to-person contact ideal modes of transmission. Which of the following contributes to the ease of transmission via these modes? Select all that apply 1) Resistance to antibiotics 2) Low infectious dose 3) Survival in environment outside host 4) Resistance to chlorine treatment

Answer 1

Answer:

A) Explore the CDC website regarding modes of transmission of Giardia. Which of the following scenarios could result in transmission of Giardia? Remember that giardiasis is classified as a waterborne disease.

Select all that apply

1) Oral-anal contact during sex - Correct (oral-anal contact during sex can cause giardiasis)
2) Having a housemate that is infected with Giardia - Correct (infection may spread from contaminated feces)
3) An accidental needle stick during a blood draw from an infected person
4) Cleaning your dog’s crate after he has had diarrhea - Correct (Giardiasis is a zoonotic infection and can be passed from infected dogs to humans)
5) Getting a bit of river water in your mouth while swimming - Correct (Recreational water, or river water can be contaminated by the stool of someone infected with Giardia)

B) Use the CDC website to examine giardiasis surveillance data. Notice the variety of transmission modes that have been identified. The CDC notes several characteristics that make drinking and recreational water and person-to-person contact ideal modes of transmission. Which of the following contributes to the ease of transmission via these modes?

Select all that apply

1) Resistance to antibiotics
2) Low infectious dose - Correct Option (swallowing as few as 10 cysts might cause someone to become ill)
3) Survival in environment outside host - Correct Option (giardia can survive in external environment and cysts can last for several months)
4) Resistance to chlorine treatment - Correct Option (the outer shell of giardia makes it tolerant to chlorine disinfection)