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Article
March 10, 1917

THE LONGEVITY OF ADULT ASCARIDS OUTSIDE THE BODY OF THE HOST: ITS BEARING ON ANTHELMINTIC TREATMENT

Author Affiliations

Parasitologist, Research Laboratory, Parke, Davis & Co. DETROIT

JAMA. 1917;LXVIII(10):772-773. doi:10.1001/jama.1917.04270030104011
Abstract

Wharton1 has recorded experiments in which he kept the eggs of the common roundworm of man, Ascaris lumbricoides, alive in Kronecker's salt solution (physiologic sodium chlorid solution to which 0.06 gm. of sodium hydroxid per liter is added) for from six to twelve days. While I was in the service of the federal Bureau of Animal Industry, I made some tests to determine the length of time that the common roundworm of the pig, Ascaris suum, could survive outside the body of the host. A number of these worms had been collected and thrown into about a 5 per cent. dilution of liquor formaldehydi and left for a few minutes. They were taken out of the formaldehyd and nine of them placed in Kronecker 's solution and nine placed in physiologic sodium chlorid solution. The height at which the solution stood when made up was marked on the glass

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