Science
ENVS 446 University of Idaho Protozoa Cryptosporidium and Giardia Questions

ENVS 446

University of Idaho

ENVS

Question Description

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This assignment consists of 8 questions and is worth 100 points.The questions on this individual assignment (see attached document above) require you to analyze materials covered in Lectures 18 and 19. The answers for these questions can be found in the lectures, readings, handouts and/or by some searching on the Internet. Provide as much detail as appropriate

Lectures:

18


19



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ENVS446/546 Drinking Water and Human Health Assignment 7 Due: March 27, 2020 Covers Modules 18 and 19 Note: Analyze and answer the questions below. Save and include your NAME on the assignment and filename when you submit. 1. List and discuss similarities and differences between giardia and cryptosporidium. 2. Assume that you are a healthy individual. Describe what happens to you during the three- week period after you have been infected by cryptosporidium and come down with cryptosporidiosis. 3. What can be done to protect surface water that is used for drinking water from cryptosporidium? Discuss. 4. Many health professionals consider protozoa in drinking water a larger threat to human health than bacteria? Do you agree or disagree? Defend your answer. 5. List treatments that can be used to remove cryptosporidium from drinking water. Which two treatments are most practical? Defend your answer. 6. Even though Cyclospora is a close relative to cryptosporidium, it is much easier to remove from drinking water. Why is this statement true? 7. Health professionals are concerned about the detrimental impacts of viruses and algae on drinking water quality. Why should we be concerned about these two classes of organisms? 8. Describe the cryptosporidium outbreak in the early 1990s in Milwaukee, Wisconsin. Please cover the following items: (1) how many people were impacted?, (2) why did the city’s filtration system not remove this pathogen? (3) what type of person was most adversely impacted by this outbreak?, (4) what introduced this pathogen to the city’s water supply? And (5) what should be done to ensure that this does not happen again in Milwaukee? ...
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Running head: DRINKING WATER AND HUMAN HEALTH ASSIGNMENT

Drinking Water And Human Health Assignment
Student’s Name
Institution Affiliation
Date

2

DRINKING WATER AND HUMAN HEALTH ASSIGNMENT
Protozoa Cryptosporidium & Giardia
1. List and discuss similarities and differences between giardia and cryptosporidium.

Similarities between giardia and cryptosporidium


Both are waterborne diseases and are spread through swallowing of the parasite from
contaminated water and food.



Both oocysts survive in human intestines and also the animals.



Both organisms produce protective cysts which enable the microorganism to survive
on the environment until the host ingests it.



Both can cause diarrhoeal illnesses in the intestines

Differences


Cryptosporidium symptoms on the host appear between one to seven days after
infection, whereas giardia symptoms are felt between 1o days to 25.

2. Assume that you are a healthy individual. Describe what happens to you during the
three- week period after you have been infected by cryptosporidium and come down
with cryptosporidiosis.

After infection of the parasite, the patient develops signs and symptoms in the first week.
Such as watery diarrhoea which follows d...

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