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Re. ""Wilderness Diarrhea NRO 

Hope you don't mind this post taking up space here. Just delete the quote if you like. I recently posted a question on NRO notice board and you responded, saying 

It seems to me that something along these lines should be included in the article, and that the sources largely back it up. However, there may be a bit of a problem with conflation of general GI symptoms and diarrhea specifically, especially in the MS&SE; ref. In order to allay the concerns of the other editor and improve the article, there will also need to be some information (just a statement, probably) contextualizing the prevalence of diarrhea caused by strenuous activity relative to the prevalence of diarrhea caused by pathogens. If we can improve it along these lines, I'll be happy to help argue for its inclusion in the article.

Here's my re-write, which I haven't proposed as yet. Does it do the job? I'm afraid it won't be accepted because it may imply that ""Wilderness Diarrhea"" is a non-existent category... which I think maybe it sortta is....

My larger problem is, that I think the article is based on an overblown view of the subject, even though it's got a couple of sources to the contrary. Thing is, I've got like five good sources directly on the ""overblown"" side (not the ones below) but they get shunted into ""controversy"" section, with the implication that they are fringe theories, or simply deleted because they aren't ""peer reviewed"" or the source doesn't cite a source..or etc.. things like that....It's not that I'm against telling people to treat suspect water, but I think the preponderance of research (apart from ""expert opinion"" suggests that the concern is highly over-stated, and to simply say that that would be unacceptable.

I've been keeping away from the article for a week. It's the domain currently of a single editor who seems to simply know what's best. Any way here is re-write of the bit, along with some proposed context.

Causes
The most common causes of wilderness diarrhea are Giardia and Cryptosporidium Backer, Howard D. (2007), “Field Water Disinfection”, In: Auerbach, Paul S. (editor), Wilderness Medicine, 5th edition, Philadelphia, Pennsylvania: Mosby Elsevier, pg 1369., although several other organisms may play a larger role than generally believed [] . Other infectious agents include Campylobacter, hepatitis A virus, hepatitis E virus, enterotoxogenic E. coli, e. coli 0157:H7, Shigella, and various enteric viruses. More rarely, Yersinia enterocolitica, Aeromonas hydrophila, and Cyanobacterium may also cause disease.

The vectors for infectious diarrhea, both within and outside wilderness, are limited to contaminated food, water, and hand-to-mouth transmission. It may be difficult to accurately associate a particular case with a recent wilderness visit, because incubation can vary widely,  up to several weeks or more, while infection outside the wilderness is common. 
Giardia alone may infect up to 10% of Americans at any one time, although most carriers are asymptomatic.

Within any given four-week period, as many as 7.2% of Americans may experience some form of diarrhea. []. The most common causes are viruses, followed by bacteria and parasites including Giardia[]. Other important causes of diarrhea in the U.S. are non-infectious, and include medications, stress, or a change in eating or exercise patterns. [] 

Non-infectious gastrointestinal distress, including diarrhea, is common as a result of strenuous excercise []. A study of 155 men and women who walked an average of 26 miles a day for four days, found 24% of the subjects experienced gastrointestinal symptoms. No relationship was established between symptoms and age, gender, previous training, or walking speed. []  

Factors in diarrhea related to exercise may include dehydration, the diversion of blood from the bowel to the working muscles (gut ischemia), certain foo