Does keeping hot water in a thermos for 8-10 hours breed bacteria?

Posted by paxmundi @paxmundi, Feb 27, 2025

I recently found out that i also have Mycobacterium Avium and Nocardia farcinica. I now boil my water in my Instant Pot for 11 minutes but then put it in thermoses so I have warm water throughout the day to drin, a big part of my airway clearance regimen. Does having it in a thermos for sometimes eight hours breed bacteria if I am not drinking directly from the thermos? Many thanks for all the guidance here!

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Profile picture for Sue, Volunteer Mentor @sueinmn

First, let's remember that the goal is to minimize exposure to NTM, we will never eliminate it entirely.
My filter canister is below the kitchen floor in the laundry room, in the cold water line, about 3-4 feet from tap itself. The small amount of NTM that could be in the pipes "upstream" of the filter is vastly diluted by the volume of water coming through. If we are gone for a while, we run every tap for 5 minutes, flush every toilet several times to clear the taps per Dr Falkinaham's recommendation.

Dr Falkinham's studies of showers with hot water at 130-135F or above also notes that the amount of NTM exposure from the cold water mixed in is very small.

I cannot speak to the issue of showerhead exposure, but using the above info, I believe that exposure would be small.

Here is my logic - my "rainwater" shower head doesn't produce much mist, the concentration of any NTM is negligible per Dr F, most of the water drains/drips out after use allowing the fixture to dry, so it is an acceptable level of risk to me. If I was a more cautious person, I would possibly soak the head once in a while to eliminate biofilm.

Each of us must choose our own level of risk tolerance. After 5 years with minimal exacerbation and no return of MAC, this is what works in my life.

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@sueinmn
Sue, do you mean your shower is 130 to 135 Or is that the water heater?

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Based on Dr. Falkinham that Sterilized water, prepared by boiling, ultraviolet irradiation or filtration can be stored indefinitely if placed in a sterile bottle or container.

Ling

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Profile picture for kamarla @kamarla

@sueinmn
Sue, do you mean your shower is 130 to 135 Or is that the water heater?

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@kamarla I'm not sure of the temp at the water heater as the dial doesn't show the setting in degrees. But, after running 2-3 minutes to warm the pipes, the hot water at the tap is always 132-135 F. Of course, we turn it down to shower, or it would scald us.

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Profile picture for Sue, Volunteer Mentor @sueinmn

@kamarla I'm not sure of the temp at the water heater as the dial doesn't show the setting in degrees. But, after running 2-3 minutes to warm the pipes, the hot water at the tap is always 132-135 F. Of course, we turn it down to shower, or it would scald us.

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@sueinmn
Sue what do you use to check the water temp at the tap?

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Profile picture for irenea8 @irenea8

@sueinmn
Sue what do you use to check the water temp at the tap?

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@irenea8 A digital thermometer in a cup of water.

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Profile picture for pattyrobertson @pattyrobertson

sue, I have bronchiectasis, asthma and 2 sputum samples with nocardia farcinica(one is nocardia kroppenstededtii farcinica) and a bronchial lavage that had mycobacterium abcensis and nocardia farcinica. my infectious disease doctor is using a wait and see approach because i feel great and my lungs are normal on resp. tests. i'm thinking of going to national jewish in denver to get a second opinion, what would you suggest?

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@pattyrobertson I am not Sue but like you I felt fine at diagnosis (BE/MAC) and my pulmonary function test was normal. I took myself to NJH and they recommended treatment based on the extent of damage on CT, my lack of symptoms and normal PFT notwithstanding. Keep in mind I was told by my local medical team that my disease was “stable” (for almost a year, 4 CTs) but NJH said nope, progressive cavitary disease. So, from my experience I would say 1) your CT has everything to do with the decision to watchful wait and 2) it’s imperative to have a true expert evaluate your CT. For me, that weighs in favor of a second opinion from a designated care center. Myself I found the travel to NJH burdensome and the poor communication with my NJH doctor frustrating so I tried a designated care center closer to home and had a better experience all around. Good luck!

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Profile picture for pattyrobertson @pattyrobertson

sue, I have bronchiectasis, asthma and 2 sputum samples with nocardia farcinica(one is nocardia kroppenstededtii farcinica) and a bronchial lavage that had mycobacterium abcensis and nocardia farcinica. my infectious disease doctor is using a wait and see approach because i feel great and my lungs are normal on resp. tests. i'm thinking of going to national jewish in denver to get a second opinion, what would you suggest?

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@pattyrobertson The reality is that it is a shot in the dark too often trying to find a good pulmonologist in any facility. Considering many factors for a doctor's basic day it is also a shot in the dark finding a doctor/pulmonologist who communicates as you would hope they would, and/or directly to you, verses their chosen nurse who often answers for them. In regard to my messages sent via my chart to my doctors/pulmonologist I have often asked if that is what the doctor actually said.
You may have noticed, and keep in mind what NJH helped bayarea58 understand per her post " Keep in mind I was told by my local medical team that my disease was “stable” (for almost a year, 4 CTs) but NJH said nope, progressive cavitary disease."
I went to NJH and many have as you probably have noticed. For me I was glad I went, however, I also searched for a pulmonologist closer to me. We do not have a center of excellence in OKC. After visiting seven different pulmonologists (Denver, Tyler, TX, Dallas, OKC etc.) since being diagnosed in 2022 and giving each a chance to show me if I was with the right pulmonologist, I am now seeing one here in OKC that another pulmonologist I was seeing suggest I see. I am pleased with this decision so far. The new pulmonologist was the first to suggest and refer me to a 'fantastic' speech therapist that is helping me. He, the new pulmonologist, also is the first pulmonologist that wanted me to visit with the facilities Infectious Disease Doctor. That visit isn't until mid summer.
We have to figure out what is best for us, what we can do in all ways that have to be considered and be sure we make a decision that we won't regret in the long run.
Barbara

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