Uncinariasis (Hookworm disease) in Porto Rico : a medical and economic problem . ence the quality of labor, as a careful perusal of Cham-berlins cases will demonstrate. Twenty ova to a field (one-third objective, 4 ocular, Leitz), wascommon in our experience, and we have often seen more than this,even to a hundred. Rare is it that the first field does not discloseone. Compare this with Chamberlins conclusion, In many lightinfections the ova are difficult to find, requiring the complete ex-amination of five or six cover-glass preparations. Leichtensterns method of estimating the number of femal
Uncinariasis (Hookworm disease) in Porto Rico : a medical and economic problem . ence the quality of labor, as a careful perusal of Cham-berlins cases will demonstrate. Twenty ova to a field (one-third objective, 4 ocular, Leitz), wascommon in our experience, and we have often seen more than this,even to a hundred. Rare is it that the first field does not discloseone. Compare this with Chamberlins conclusion, In many lightinfections the ova are difficult to find, requiring the complete ex-amination of five or six cover-glass preparations. Leichtensterns method of estimating the number of female para-sites from the number of eggs is to divide the number found in agram of feces by 47. Lutz made a 25 per cent suspension of the feces in water andcounted the eggs in a square centimeter into which the slide wasdivided. This square centimeter held 4 milligrams of the liquid, oran equivalent of 1 milligram of feces. This amount is multipliedby the weight in grams of the daily amount of feces expelled. It issaid that 0,000 ova are the normal output of each female in a 1.
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