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worms in tequila

Steve G. Kayes kayes at SUNGCG.USOUTHAL.EDU
Mon Jun 12 10:24:11 EST 1995

As one who has worked extensively with Toxocara canis, the ascarid of 
dogs, I have had ample experience working with the eggs.  When I have 
removed the eggs from the reproductive tissues, I wash them for 30 min in 
1 N NaOH.  Then following a rinse in tap water, they are allowed to 
embryonate in 0.1 N H2SO4 for 30 days at room temp.  Some people use 
formalin in lieu of the acid.  Either way, the egg shell is resistant to 
the passage of the active ingredients and the cultures remain pure 
because nothing else grows in the solution.  The eggs are then washed in 
tap  water prior to using them for infecting lab animals.  BTW, betadyne, 
a "tamed" iodine solution works extremely well at penetrating the egg and 
killing the larvae within.


On 12 Jun 1995 daj at mailserver.nhm.ac.uk wrote:

> During my undergarad days I was told that Ascaris eggs survived 
> pickling in formalin. Never put it to the critical test though.
> David A. Johnston
> Research Fellow,
> Dept of Zoology, The Natural History Museum, Cromwell Road,
> South Kensington, London SW7 5BD. England
> (tel 071 9389297, fax 071 9388754, email daj at nhm.ac.uk)

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