Can I acclimate myself to unpure water?

Say I was going to be in Mexico or the mountains for quite some time and didn’t want to worry about purifying water. Is there a way I could eventually get my body acclimated to the water so that I didn’t get sick from it?

As I understand it, many times the sickness from water is because the bacteria is different than what your body is used to–not necessarily because it’s bad bacteria. So would it be possible to get my body to accept this new bacteria?

I doubt that the water where you live now is 100% pure.

One anecdotal example: my sister lived in Calcutta in India for a couple of years. She didn’t want to face the prospect of having to drink bottled water for the whole period. Soon after her arrival therefore she just started drinking the local water. Yes, she got sick, had diarrhoea etc. But she was fine after about a week and continued to drink the local water thereafter with no problems.

Don’t do it unless you’ve taken medical advice!

I’m not a doctor and this is purely anecdotal, but I used to drink a glass of the local tap water when I went to a third world country, get sick, and get used to it. Then I went to Delhi and stayed with a British diplomat. When I arrived at his house, I told him I was going to do this, and he handed me a health advisory that said, in paraphrase, “There is no acquirable immunity to most serious water-borne diseases”. The same guy, a month after I left, accidentally glugged a mouthful of water in his shower and got giardiasis, dysentery, and something else nasty. He was in hospital for 8 weeks.

It’s my understanding it’s not necessarily as simple as changing brands of gut bugs. There is a whole process involving a pumping up of the immune system and all that. Mr. America drinks from the Ganges, he dies. Ghandi drinks from a North American mountain stream, he quenches his thirst.

The above is open to correction.

It depends entirely what is in the water to make you sick .In many parts of Mexico you are probablly playing Russian roulette because the bugs are genuine water-borne pathogens. As jjimm points out you don’t really acquire immunity to the more serious water-borne diseases like cholera or dysentry. Some people will acquire a level of resistance due to being permanently infceted, but you definitely don’t want that since you are likely to be infective as well, so you pose a continuous risk to others. Other people will remain infected and suffer recurring bouts, others will be cured either naturally or thorugh medicine and then be just as susceptible to subsecuent re-infections.

In “the mountains” you probably could acquire immunity because the bugs are most likely to be normal aquatic microbes that you just haven’t been exposed to before. But that’s a strong generalisation and it depends on how many people have taken a dump usptream of you and exactly what species of animals use the area.

So is that what people in Mexico live with? Most people have a level of resistance but can still infect other people?

Yeah sure, some people will be sub-clinical carriers. Mostly people just get used to it the way that get used to influenza.

Mexico, like most of the developing world, simply suffers from periodic outbreaks of water borne diseases. The water supply becomes contaminated, people get sick and many die, the source of infection goes away and then in a few years time everybody gets sick all over again. People in these parts of the world, and people in the developed world 100 years ago, simply treat water brone diseases the way we treat influenza. It’s inevitable that there will be regular outbreaks and nobody expects that previous infection will render them immune.

So for the same reason that no sane person will risk infleunza infection in the hopes of devloping a resistance no sane person should be trying to develop a tolerance to water borne infections.

Uh, no. Water from a North American mountain stream is quite capable of sickening you, at least some of the time. Even if it is clear, cold, and glacier-fed.

A cite about water-borne disease in British Columbia, Canada:

And one from the Southern Sierra Boy Scout Council: