Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-27T23:58:17.988Z Has data issue: false hasContentIssue false
  • English
  • Français

Ancylostoma duodenale and Necator americanus: effect of temperature on egg development and mortality

Published online by Cambridge University Press:  06 April 2009

G. Smith  and
G. A. Schad
G. Smith
Affiliation:
Department of Clinical Studies, University of Pennsylvania School of Veterinary Medicine, New Bolton Center, 382 W. Street Road, Kennett Square, PA 19348, USA
G. A. Schad
Affiliation:
Department of Pathobiology, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA 19104, USA
Get access Rights & Permissions [Opens in a new window]

Summary

The development and mortality of the eggs of Ancylostoma duodenale and Necator americanus in distilled water were monitored over a range of temperatures between 15 and 35°C. Egg demography was examined within the context of a fourparameter mathematical model of development and mortality. Over the range of temperatures studied, egg mortality (μ) was an increasing exponential function of temperature (T) measured in degrees Celsius. A single model adequately described the mortality of both species (ln [μ] = 0·041*T − 6·87). The minimum time (τ) to hatching was consistently less for A. duodenale (ln [1/T] = −(0·79+53·05*[l/T]) than N. americanus (ln [1/T] = −(0·99 + 53·05*[l/T])). The hatching rate [σ when t > τ) was an increasing function of time and temperature in both cases, but the precise functional relationship was species specific.

Keywords

Ancylostoma duodenaleNecator americanusegg developmentmortalitytemperature.
Type
Research Article
Information
Parasitology , Volume 99 , Issue 1 , August 1989 , pp. 127 - 132
Copyright
Copyright © Cambridge University Press 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Berberian, J. F. & Mizelle, J. D. (1957). Developmental studies on Haemonchus contortus Rudolphi (1803). American Midland Naturalist 57, 421–39.Google Scholar
Berman, M. & Weiss, M. F. (1978). SAAM Manual, Version SAAM27, DHEW Publication Number (NIH) 78–180, National Institutes of Health, Bethesda, Md 20014, USA.Google Scholar
Chowdhury, A. B. (1971). Epidemiological factors of helminth infections. In Soil Transmitted Nematodes and Tetramisole, Proceedings of the Symposium held at Vighyan Bhavan, pp. 23–40. New Delhi, April 9–10, 1971. Bombay: Ethnor.Google Scholar
Croll, N. A. (1974). Necator americanus: activity patterns in the egg and the mechanism of hatching. Experimental Parasitology 35, 80–5.Google Scholar
Ito, S. (1930). Quoted in ‘Progress of Medical Parasitology in Japan’. vol. 3, 1966 (ed. Morishita, K., Komiya, Y. & Matsubayashi, H.), Tokyo: Meguro Parasitological Museum.Google Scholar
Katabami, J. (1959). Quoted in ‘Progress of Medical Parasitology in Japan, vol. 3, 1966 (ed. Morishita, K., Komiya, Y. & Matsubayashi, H.). Tokyo: Meguro Parasitological Museum.Google Scholar
Matsusaki, G. (1928). On the hatching of Ancylostoma duodenale, Necator americanus, and Trichostrongylus orientalis. Keio Igaku 8, 267–282. Article reprinted in English in Yokohama Medical Bulletin 13, 17–26, 1962.Google Scholar
Nelder, J. A. & Wedderburn, R. W. M. (1972). Generalized linear models. Journal of the Royal Statistical Society, A 135, 370–84.Google Scholar
Okudo, K., Yajima, F. & Yanagisawa, R. (1958). Quoted in ‘Progress of Medical Parasitology in Japan’, vol. 3, 1966 (ed. Morishita, K., Komiya, Y. & Matsubayashi, Y.). Tokyo: Meguro Parasitological Museum.Google Scholar
Schad, G. A. (1970). Interactions of populations of man and hookworm in rural west Bengal. Johns Hopkins CMRT (1969 1970), 5 23.Google Scholar
Schad, G. A., Nawalinski, T. A. & Kochar, Y. K. (1984). Human ecology and the distribution and abundance of hookworms. In Human Ecology and Infectious Disease, (ed. Croll, N. & Cross, J.), pp. 187–223. New York: Academic Press.Google Scholar
Silverman, P. & Campbell, J. A. (1959). Studies on parasitic worms of sheep in Scotland. Parasitology 49, 23–38.Google Scholar
Smith, G. – Grenfell, B. T. (1984). The influence of water temperature and pH on the survival of Fasciola hepatica miracidia. Parasitology 88, 97–104.CrossRefGoogle ScholarPubMed
Smith, G., Grenfell, B. T. & Anderson, R. M. (1986). Development and survival of the non-infective free living stages of Ostertagia ostertagi. Parasitology 92, 471–82.Google Scholar
Udonsi, J. K. & Atata, G. (1987). Necator americanus: temperature, pH, light and larval development, longevity and desiccation tolerance. Experimental Parasitology 63, 136–42.Google Scholar
Whitlock, H. V. (1957). The recovery and identification of first stage larvae of sheep nematodes. Australian Veterinary Journal 35, 310–16.Google Scholar
Young, R. R., Nicholson, R. M., Tweedie, R. L. & Schuh, H. J. (1980). Quantitative modeling and prediction of development times of the free-living stages of Ostertagia ostertagi under controlled and field conditions. Parasitology 81, 493–505.Google Scholar