{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,2]],"date-time":"2025-11-02T16:28:55Z","timestamp":1762100935265},"reference-count":35,"publisher":"Cambridge University Press (CUP)","issue":"1","license":[{"start":{"date-parts":[[2009,4,6]],"date-time":"2009-04-06T00:00:00Z","timestamp":1238976000000},"content-version":"unspecified","delay-in-days":5393,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Parasitology"],"published-print":{"date-parts":[[1994,7]]},"abstract":"<jats:title>SUMMARY<\/jats:title><jats:p>Laboratory bred DSN hamsters were exposed to varying doses of infective larvae of <jats:italic>Ancylostoma ceylanicum<\/jats:italic> (orally) or <jats:italic>Necator americanus<\/jats:italic> (percutaneously) and were autopsied at times which corresponded to a period immediately before cessation of growth of worms or soon afterwards. A total of 829 (404 male and 425 female) A. <jats:italic>ceylanicum<\/jats:italic> and 1582 (781 male and 801 female) <jats:italic>N. americanus<\/jats:italic> were measured. At worm burdens of fewer than 100, the length of <jats:italic>A. ceylanicum<\/jats:italic> appeared to increase with infection intensity and no evidence was found that growth was retarded under crowded conditions. In an experiment comparing directly low (mean worm burden = 22) and heavy infections (mean worm burden = 180) significant negative associations between both weight and width, and worm burden were detected, but length again increased with worm burden. In contrast, 5 experiments with <jats:italic>N. americanus<\/jats:italic> indicated negative relationships between measures of worm size (length, width, wet and dry weight) and worm burden. It was concluded that <jats:italic>N. americanus<\/jats:italic> is subject to regulation by density-dependent processes within the host while <jats:italic>A. ceylanicum<\/jats:italic> is not sensitive to the same degree.<\/jats:p>","DOI":"10.1017\/s0031182000077829","type":"journal-article","created":{"date-parts":[[2009,6,5]],"date-time":"2009-06-05T13:57:10Z","timestamp":1244210230000},"page":"119-128","source":"Crossref","is-referenced-by-count":5,"title":["Density-dependent regulation of the growth of the hookworms <i>Necator americanus<\/i> and <i>Ancylostoma ceylanicum<\/i>"],"prefix":"10.1017","volume":"109","author":[{"given":"S. M. B.","family":"Norozian-Amiri","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. 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