Abstract
IN 1911, Looss1 noticed first- and second- stage larvæ of Ancylostoma duodenale ingesting the bacteria ‘contaminating’ his cultures. He dismissed bacteria as a regular food source, however, because such larvæ “all show the outward signs of insufficient nutrition”. Later, it was established by McCoy2, and confirmed by Lawrence3, that living bacteria were normally necessary for the nutrition of hookworm larvæ. Lapage4 also reared the third stages of a number of strongyloid worms, including Trichostrongylus retortaeformis, in broth cultures of coliform bacteria. Although McCoy5 made measurements of Ancylostoma caninum larvæ reared in coliform cultures, none of these workers reported any comparisons made between such measurements and those of larvæ grown in ordinary fæcal culture.
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References
Looss, A., Rec. Sch. Med. Cairo, 4 (1911).
McCoy, O. R., Science, N.S., 69 (1929); Amer. J. Hyg., 10 (1929).
Lawrence, J., Aust. J. Exp. Biol. Med. Sci., 26 (1948).
Lapage, G., Nature, 131 (1933); 3rd Rep. Dir. Inst. Anim. Path., Cambridge (1933).
McCoy, O. R., Amer. J. Hyg., 11 (1930).
White, G. F., J. Parasit., 18 (1931).
Ministry of Health, Rep. on Pub. Hlth. and Med. Subjs., 71 (rev.)(1939).
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WILSON, P. Size of Trichostrongyle Infective Larvæ in ‘Monobacterial’ Culture. Nature 174, 520 (1954). https://doi.org/10.1038/174520a0
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DOI: https://doi.org/10.1038/174520a0
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