Assignment: Cryptosporidium can cause diarrhoea in animals and humans, with potentially severe infections in people who are immunocompromised. A source of infection can be contaminated drinking water. Much of the drinking water in the north and the west of the UK is surface water gathered off hills which are grazed by sheep. It has been suggested that a means of managing the risk of Cryptosporidium infection in humans would be to remove sheep from grazing ground where drinking water is collected.
This assignment requires you to look at the evidence in the literature as to whether the strategy of removing sheep from water catchment is likely to assist in managing the risk of human cryptosporidium infections. You are required to write a review of this evidence. The word limit is 1500 words, your document should be referenced and you may find the website www.ebvmlearning.org useful in helping you form your questions to search the literature.
There are 4 principle questions that you will need to address:
1. What is the evidence of Cryptosporidium infection in sheep?
2. Do the same species of Cryptosporidium infect both sheep and humans?
3. Are Cryptosporidium oocysts resistant enough to survive in the environment long enough to contaminate drinking water?
4. Can infections in people be linked to sheep? If so is this a robust link?