bleach to disinfect giardia

RE: bleach to disinfect giardia

Rick Hayman — Wed, 25 Nov 2015 10:20:56 GMT

Household Bleach is generally supplied at medium strength, that being 50,000ppm. Standard infection control guidelines for the use of chlorine against body spills would be 10,000ppm of availabel chlorine. As such, to deal with haemorrhagic diarrhoea (say infected with Parvovirus) would require a 1:5 (20% dilution)

Thin Bleach through as from discount stores is supplied at 25,000ppm and thick bleach as used in toilets is supplied at 100,000ppm.

Laboratory discard is generally treated using 2,500ppm and general environmental disinfection can be managed at 1,000ppm.

It shoudl be noted that chlorine is less effective when in the presence of high soil conditions.

RE: bleach to disinfect giardia

Rick Hayman — Wed, 25 Nov 2015 10:16:05 GMT

According to work undertaken by Edward L. Jarroll,Alan K. Bingham, and Ernest A. Meyer at Department of Microbiology and Immunology, University of Oregon Health Sciences Center, chlorine was tested to be effective against Giardia Lamblia cysts with a chlorine concentration of 8mg/litre at pH 6 and 7 after contact for 10 minutes.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC243720/

Products such as ANIGENE NaDCC deliver 1000ppm of available chlorine from 1 tablet in 1 litre of water and are generally effectove against other organisms including viruses (see manufacturers information for more data).

RE: bleach to disinfect giardia

Celine — Mon, 23 Nov 2015 09:37:43 GMT

Cheers Sal

RE: bleach to disinfect giardia

Sal the 1st — Sun, 22 Nov 2015 15:40:05 GMT

household bleach varies between 3 and 6%

6% is classed as strong bleach or some of the thicker bleaches

data sheet for domestos thick - isnt as strong as I thought it was unless it has changed? I thought it was closer to 6%

http://www.express-cleaning-supplies.co.uk/custom/upload/Information%20Sheets/1251%20new.pdf

RE: bleach to disinfect giardia

Julie-Anne Wilson — Sun, 22 Nov 2015 15:32:13 GMT

I know, I think they're all different strengths as well.

RE: bleach to disinfect giardia

Celine — Sun, 22 Nov 2015 14:20:14 GMT

Yes it's a nightmare, what concentration is "household bleach" anyway?!

Thanks for your reply

RE: bleach to disinfect giardia

Julie-Anne Wilson — Sun, 22 Nov 2015 13:28:06 GMT

Don't know if it's reliable but this site http://vetmedicine.about.com/od/zoonotic/f/Giardia.htm says 1 part bleach to 10 parts water.

I was trying to find out about Giardia disinfection a couple of weeks ago for a CPL cat we had in but it's really hard to find info on it.